Airtac SAI series: standard cylinder - SAI63X502FAT

Photos are for reference only. Not all models have pictures.

Description

Specifications: SAI63X502FAT — SAI series double-acting single-rod cylinder; 63 mm bore × 502 mm stroke; medium-carbon-steel rod; non-magnetic piston; front flange mounting (FA); TPU seals; NPT3/8 ports (T).

Product Catalog

Download Airtac Product Catalog (PDF)

For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.

SI to SAI replacement guide

Model Code Explained

Code Meaning
SAI Standard double-acting single-rod cylinder
63 63 mm bore
No rod-material code Medium-carbon steel
X Separator before stroke
502 502 mm stroke
No magnet suffix Without built-in magnet
FA Front flange mounting
No seal suffix TPU seal option
T NPT3/8 working ports

Technical Specifications

Parameter Value
Model SAI63X502FAT
Action Double acting, single rod
Bore 63 mm
Stroke 502 mm; Special stroke; confirm order and delivery conditions
Piston rod material Medium-carbon steel
Magnetic piston Without magnet
Mounting selection Front flange mounting
Seal option TPU
Working ports NPT3/8; two working air ports
Working medium Air filtered to 40 µm or finer
Operating pressure 0.15–1 MPa (1.5–10 bar; approximately 22–145 psi)
Proof pressure 1.5 MPa (15 bar); not continuous operating pressure
Temperature -20 to 70 °C; apply the complete system limits
Piston speed 30–800 mm/s
Stroke tolerance +1.5 / -0 mm
Cushioning Adjustable pneumatic cushion; 30 mm nominal cushion reference
Rod diameter / end thread 20 mm / M16×1.5
Cylinder reference weight 4251.28 g; catalog calculation, not measured shipping weight

Reference weight = 1495.3 + 5.49 × 502 g, decimal grams, from the matching non-magnetic SAI single-rod base. A/B rod and H/N seal mass differences are unquantified: not certified variant mass. Excludes brackets, rod joints, sensors and packaging; actual weight prevails.

The 30 mm nominal cushion distance does not guarantee usable deceleration length for shorter strokes. Verify actual load/speed performance.

Features and Operation

ISO15552 standard cylinder, formerly ISO6431.

Compact special-shaped bidirectional piston sealing structure with oil storage.

Corrosion-resistant profiled aluminium tube; no tie rods; external sensor grooves.

Stable adjustable pneumatic cushioning.

Multiple cylinder variants and mounting accessories available.

External and Mounting Dimensions

A+stroke ends at rear-cover face; overall formulas add rear boss NA once. Bare body excludes accessories, sensors, joints and packaging. Magnetic/nonmagnetic dimensions match. Drawing-specific symbols are not extra overall dimensions. Numbers are mm; threads are explicit. For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.

Basic dimension / drawing symbol Dimension (mm) / thread
Illustrated A + stroke to rear-cover face 692 mm = 190 + 502
Body face span: AC + stroke 623 mm = 121 + 502
Derived bare retracted length: A + stroke + NA 696 mm = 190 + 502 + 4
Derived bare extended length: A + 2 × stroke + NA 1198 mm = 190 + 2 × 502 + 4
Body cross-section 75 × 75 mm
Base drawing symbols A=190 mm before adding the actual stroke;AB=69;AC=121 mm before adding the actual stroke;AD=33;AE=33;B=75;D=20;DA=42;E=M16×1.5;EA=32;F=23;FA=8;M=45;MA=27;H=17;K=M8;KA=17;KB=56.5;N=45;NA=4;P=NPT3/8;PA=16.5;PB=7.5

Selected Mounting Dimensions

Accessory / drawing symbols Dimension (mm) / thread
FA — Front flange mounting; F-SI63FA A + stroke=692 = 190 + 502;C + stroke=623 = 121 + 502;BA=45.5;BB=12;BC=75;BD=50;BE=118;BF=100;BP=9;T=56.5

Mounting and Rod-End Accessories

Mounting option Part code and material
LB — Axial foot mounting F-SI63LB; Low-carbon steel
FA — Front flange mounting F-SI63FA; Aluminium alloy
CA — Single rear clevis F-SE63CA; Ductile cast iron
CB — Double rear clevis F-SE63CB; Ductile cast iron
CR — Single clevis connection F-SI63CR; Ductile cast iron
TC — Intermediate trunnion mounting F-SAI63TC; Ductile cast iron
FTC — Front-cover trunnion mounting F-SI63FTC; Ductile cast iron
TCM1 — Trunnion support type 1 F-SI63TCM1; Ductile cast iron
TCM2 — Trunnion support type 2 F-SI63TCM2; Aluminium alloy
FB — Rear flange mounting F-SI63FA; Aluminium alloy

FA/FB share a flange plate at different positions. CR requires CB. TC/FTC need the listed TCM1/TCM2: support size numbers may differ from bore. Confirm package and fasteners.

TC is adjustable and separately orderable for this bore. Drawing-reference support centers: position for actual load.

TC locking torque: 4–6 N·m; static holding-force reference: 3000 N, not cylinder thrust or payload. Above this, specify factory nonstandard fixed TC. Place bracket on barrel ledges and position it. Pre-tighten; check bracket and barrel sloping faces contact. 50–125: tighten 8 black screws through pre-, intermediate and final tightening, then tighten 8 white screws.

Drawing holes: LB 4 AP; FA/FB 4 BP; CR 4 K through-holes and 4 L counterbores; TCM1 4 E; TCM2 4 L through-holes and 4 K counterbores. CA DQ/CB CP tolerance: ±0.1 mm. Hole counts do not specify supplied fastener quantities.

Rod-End Joint Dimensions

Joint / drawing symbol Dimension (mm) / thread / angle
I joint — F-M16X150I NC=16;ND=64;NE=82;NF=32;NG=23;NH=M16×1.5;NM=16;Reference weight=312 g
Y clevis joint — F-M16X150Y NA=32;NC=16;ND=64;NP=32;NQ=80;NM=16;NH=M16×1.5;PA=39;PB=32.8;Reference weight=367.5 g
Floating joint — F-M16X150F MA=90;MB=27;MC=10;MD=41;ME=44.5;MF=19;MG=8;MH=17;MI_MJ=M16×1.5;MK=7°;Reference weight=543 g
Spherical rod-end joint — F-M16X150U PA=15;PB=40;PC=16;PD=28;PE=64;PF=84;PG=M16×1.5;PH=15°;PI=27;PJ=22;PK=21;Reference weight=204 g

M16×1.5 rod joints use the carbon-steel catalog category; subparts/finishes are unspecified. Select joints/guides for load. Joint mass is excluded from cylinder weight. Y drawing: no separate pin-kit code or guaranteed kit count.

Force and Application

Parameter Value
Extension effective area 3117 mm²; catalog rounded single-rod area
Extension at 0.5 MPa 1558.5 N theoretical
Retraction effective area 2803 mm²; catalog rounded single-rod area
Retraction at 0.5 MPa 1401.5 N theoretical

Theoretical axial force = effective area (mm²) × pressure (MPa), before friction/losses. Rod area reduces retraction area. Not safe working loads or guaranteed payloads.

Installation and Maintenance

Qualified personnel only. Before maintenance: secure loads, guard motion, isolate power/air and release residual pressure. Prevent unexpected restart motion; design for power/air loss.

Use clean, dry air filtered ≤40 µm; remove water, degraded oil and debris. Protect from dust, corrosion, coolant, weld spatter, vibration, heat and freezing; assess unusually dry air. Strong magnetic fields affect sensing.

Start unloaded; increase load gradually. Align rod/load; guide against side load, bending, impact and torque. Check long-stroke buckling, sag, support and air use. Rod joints do not replace guides.

Load-ratio guidance: ≤0.7 static/low speed; ≤0.5 at 50–500 mm/s; ≤0.3 above 500 mm/s. Not structural safety factors or payload guarantees; obey cylinder pressure/speed limits.

Fit flow controls at both ports; double action normally uses meter-out. Start closed; open gradually. Set cushions for load/speed without forcing screws. Heavy/fast loads may need an external absorber or deceleration circuit.

Compressibility/leakage defeat assumed precise prolonged closed-center stops or automatic multi-cylinder synchronization. Swing links need CA/CB/TC pivots, not rigid LB mounts forced through arcs. Match flange direction/support height to load.

Normally no added oil is needed. Once introduced, continuously use additive-free ISO-VG32 turbine oil. Oil-mist guide: ≤25 mg/m³; 0.5–5 drops per 1000 L. Size lubricator for flow; avoid excess/incompatible oil.

Clean pipes; keep sealant off leading threads. Start required tape 1.5–2 threads back. Verify tube pressure/temperature, OD/ID and bend radius. Hot spatter may require metal/flame-resistant tubing.

Protect sliding surfaces; periodically operate stored cylinders and prevent corrosion. Use the lowest cylinder/fitting/valve/tube/sensor/cable limit; temperature options do not raise other ratings.

Internal Components — SAI Catalog Reference

Item Material reference
1. Nut Carbon steel / stainless steel
2. Piston rod S45C hard-chrome-plated ground bar / stainless steel
3. Front-cover O-ring TPU
4. Front cover Aluminium alloy
5. Bushing Wear-resistant material
6. Cushion O-ring TPU
7. Barrel Aluminium alloy
8. Piston-rod O-ring NBR
9. Piston Aluminium alloy
10. Piston O-ring NBR
11. Wear ring Wear-resistant material
12. Magnet Not fitted in this non-magnetic cylinder. Catalog magnetic-version reference: Plastic type for bores100 and below; rubber type for other bores
13. Hexagon socket bolt Carbon steel
14. Cushion seal TPU
15. Rear cover Aluminium alloy
16. Support screw cap Carbon steel / stainless steel

SAI structure reference, not an option material certificate. Ordered rod/seal choices prevail: A/B is not an all-stainless cylinder; a seal option does not replace every elastomer.

Series Ordering Options

Parameter Value
Rod material choices Blank: Medium-carbon steel; A: SUS420J2 stainless steel; B: SUS304 stainless steel
Seal choices Blank: TPU; H: Fluororubber; N: NBR
Magnet choice Blank: no magnet; S: magnet fitted, sensors separately selected
Thread choices PT, G or NPT as specified by the actual order; do not mix thread standards
Catalog standard strokes 25, 50, 75, 80, 100, 125, 150, 160, 175, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000 mm
Maximum / allowable stroke 1500 / 1800 mm; separate catalog limits, not a list of all standard strokes
Stroke tolerance bands 0–250 mm: +1 / -0 mm; 251–1000 mm: +1.5 / -0 mm; 1001–1500 mm: +2 / -0 mm; above 1500 mm not specified

Series alternatives are not simultaneous features. Confirm special strokes/unlisted combinations. Retain the full model; separately select mounts, joints, sensors and circuit parts.

Magnetic Sensing

This model has no built-in magnet. DMSE and CMSE magnetic sensors are not applicable to this piston as ordered; adding a sensor does not add a magnet. A separately confirmed magnetic cylinder configuration is required for magnetic detection.

Connection and Tube-Side Options

Separately selected component Complete ordering codes; tube dimensions as labelled
NPC straight 1/4 in OD: NPC1/4-3/8; 5/16 in OD: NPC5/16-3/8; 3/8 in OD: NPC3/8-3/8; 1/2 in OD: NPC1/2-3/8
NPL elbow 1/4 in OD: NPL1/4-3/8; 5/16 in OD: NPL5/16-3/8; 3/8 in OD: NPL3/8-3/8; 1/2 in OD: NPL1/2-3/8
NPLL extended elbow — discontinued reference 1/4 in OD: NPLL1/4-3/8; 5/16 in OD: NPLL5/16-3/8; 3/8 in OD: NPLL3/8-3/8; 1/2 in OD: NPLL1/2-3/8
NPEB branch tee 1/4 in OD: NPEB1/4-3/8; 5/16 in OD: NPEB5/16-3/8; 3/8 in OD: NPEB3/8-3/8; 1/2 in OD: NPEB1/2-3/8
NPED run tee 1/4 in OD: NPED1/4-3/8; 5/16 in OD: NPED5/16-3/8; 3/8 in OD: NPED3/8-3/8; 1/2 in OD: NPED1/2-3/8
NPYB Y fitting 1/4 in OD: NPYB1/4-3/8; 5/16 in OD: NPYB5/16-3/8; 3/8 in OD: NPYB3/8-3/8; 1/2 in OD: NPYB1/2-3/8
NPH banjo elbow — discontinued reference 1/4 in OD: NPH1/4-3/8; 5/16 in OD: NPH5/16-3/8; 3/8 in OD: NPH3/8-3/8; 1/2 in OD: NPH1/2-3/8
NPHF female-branch banjo — discontinued reference 1/4 in OD: NPHF1/4-3/8; 5/16 in OD: NPHF5/16-3/8; 3/8 in OD: NPHF3/8-3/8; 1/2 in OD: NPHF1/2-3/8
NPHW twin banjo — discontinued reference 1/4 in OD: NPHW1/4-3/8; 5/16 in OD: NPHW5/16-3/8; 3/8 in OD: NPHW3/8-3/8; 1/2 in OD: NPHW1/2-3/8
NPZB cross fitting — discontinued reference 1/4 in OD: NPZB1/4-3/8; 5/16 in OD: NPZB5/16-3/8; 3/8 in OD: NPZB3/8-3/8; 1/2 in OD: NPZB1/2-3/8
NBPC metal straight — discontinued reference 1/4 in OD: NBPC1/4-3/8; 5/16 in OD: NBPC5/16-3/8; 3/8 in OD: NBPC3/8-3/8; 1/2 in OD: NBPC1/2-3/8
NPKD reducing distributor — discontinued reference main 3/8 / branch 5/16 in OD: NPKD3/8-5/16-3/8
NBKC compression fitting — discontinued reference 1/4 × 5/32 in OD × ID: NBKC1/4-5/32-3/8; 5/16 × 1/5 in OD × ID: NBKC5/16-1/5-3/8; 3/8 × 1/4 in OD × ID: NBKC3/8-1/4-3/8; 1/2 × 1/3 in OD × ID: NBKC1/2-1/3-3/8
NBB male–male adapter — discontinued reference other end male NPT1/8: NBB1/8-3/8; other end male NPT1/4: NBB1/4-3/8; other end male NPT3/8: NBB3/8-3/8; other end male NPT1/2: NBB3/8-1/2
NBD male–female adapter — discontinued reference other end female NPT1/8: NBD1/8-3/8; other end female NPT1/4: NBD1/4-3/8
NBZ unused auxiliary plug NBZ3/8
NBSL valve-exhaust silencer NBSL3/8
NBSLM miniature valve-exhaust silencer NBSLM3/8
NBESL adjustable valve-exhaust silencer — discontinued reference NBESL3/8
NPTL push-lock flow control 1/4 in OD: NPTL1/4-3/8A,NPTL1/4-3/8B; 5/16 in OD: NPTL5/16-3/8A,NPTL5/16-3/8B; 3/8 in OD: NPTL3/8-3/8A,NPTL3/8-3/8B; 1/2 in OD: NPTL1/2-3/8A,NPTL1/2-3/8B
NPSS universal flow control — discontinued reference 3/8 in OD: NPSS3/8-3/8A,NPSS3/8-3/8B; 1/2 in OD: NPSS1/2-3/8A,NPSS1/2-3/8B
NPSA tube-to-tube flow control 1/4 in OD: NPSA1/4; 5/16 in OD: NPSA5/16; 3/8 in OD: NPSA3/8; 1/2 in OD: NPSA1/2
ASC separate inline flow control two female NPT3/8: ASC30010T
GAFR upstream filter/regulator female NPT3/8: GAFR30010ST,GAFR40010ST

Separate options; not an included kit or stock promise. Connect both SAI63 working ports with NPT3/8 fittings/correct seals; check insertion depth, tool/rotation clearance, flow and tube loads. PT/G/NPT are not interchangeable. The M16×1.5 rod thread is not an air port.

Discontinued families are historical references; confirm remaining availability or approved replacements before ordering.

Use suitable soft nylon/PU; match exact OD and compression-fitting ID. Inch tube sizes are exact: 1/4 = 6.35, 5/16 = 7.9375, 3/8 = 9.525 and 1/2 = 12.7 mm; do not substitute nominal metric sizes. NPHF has male RA/extra female RB of NPT3/8; connect or permissibly seal RB, not a tube socket. Tees/Y/cross/distributors must not bridge chambers or unrelated controls.

Standard push-in fittings, direct/threadless controls and listed silencers: 0–1 MPa, −20–70 °C. NBPC: 0–1 MPa, 0–150 °C; SAI pressure path 0.15–1 MPa. NBKC/NBB/NBD/NBZ: 0–1 MPa, 0–150 °C; SAI pressure path 0.15–1 MPa. General cylinder −20–70 °C with 0–150 °C parts gives 0–70 °C or narrower. Apply lower valve/tube/sensor limits; component vacuum data do not rate a vacuum cylinder. NBPC does not share the metric BPC 0.9 MPa limit.

Install threads using the body hex, not locking nut; fully insert tube before tightening. NBB/NBD are same-standard adapters: BB male–male, BD male–female; table labels the other end. Match gender/size/flow; no cross-thread conversion. NBZ closes permitted unused auxiliary ports only, never active cylinder ports.

Cylinder-end A controls thread→tube exhaust (meter-out), with free reverse supply; B controls tube→cylinder supply (meter-in). A is usual for double action; B needs a designed meter-in circuit. Start closed/open slowly. Closed leakage is allowed: not safety shutoffs. NPTL caps on 3/8-port variants: limit: 0.24 N·m, not pipe-thread torque. Do not force caps/end stops. NPSA is an inch tube-to-tube control without A/B suffixes; match both ODs/check-throttle symbol.

Listed silencers serve separate valve exhaust: match thread/flow/backpressure. Not cylinder-port fittings, inlet filters or shutoffs. NBESL adjustment changes backpressure.

ASC30010T: separate two-female-NPT3/8-port inline control; needs male fittings. Follow P/A/check-throttle symbol. 0.05–0.95 MPa, −20–70 °C and 40 µm-or-finer filtered air; SAI pressure path 0.15–0.95 MPa before lower limits. Rated flow is not guaranteed cylinder speed.

GAFR30010ST,GAFR40010ST: separate upstream NPT3/8 filter/regulator: 40 µm, PC bowl, differential/manual drain, bracket/round gauge, no reverse-flow valve. Inlet ≤1 MPa, setting 0.15–0.9 MPa, −5–70 °C non-freezing. Respect IN/OUT, flow/pressure loss, condensate, bowl environment and downstream limits. Not cylinder-mounted or a vacuum regulator.

Match separate inch tubing and both endpoints. Metric coils, PSA/GPSA and PPA are not specified for inch sockets. Match coil length and tube pressure/temperature to the circuit.

Separate Directional-Valve and Tube Examples

4A PT: single control 4A21008, 4A31008, 4A31010; double control 4A22008, 4A32008, 4A32010. 4A G: single control 4A21008G, 4A31008G, 4A31010G; double control 4A22008G, 4A32008G, 4A32010G. 4V PT: single control 4V21008B, 4V31008B, 4V31010B; double control 4V22008B, 4V32008B, 4V32010B. 4V G: single control 4V21008BG, 4V31008BG, 4V31010BG; double control 4V22008BG, 4V32008BG, 4V32010BG. 5V PT: single control 5V21008B050, 5V31008B050, 5V31010B050; double control 5V22008B050, 5V32008B050, 5V32010B050. All listed B versions use DC24V. 4V has DIN entry and internal pilot; 5V has 0.5 m leads (050) and internal pilot. 4A has single/double pneumatic control, external pilot supply and no coil. 4A configurations 20008/30008/30010: single control has one PT1/8 pilot port, double has two; confirm pilot threads on G versions.

20008 (G: 4A/4V; PT: 4A/4V/5V): P 1/4, A/B 1/4, R/S 1/8; 30008 (G: 4A/4V; PT: 4A/4V/5V): P/A/B/R/S 1/4; 30010 (G: 4A/4V; PT: 4A/4V/5V): P 3/8, A/B 3/8, R/S 1/4. Ports use the assigned PT/G thread; select endpoints independently. Separate piped valve examples, not direct cylinder fittings or included parts. Operating range: 0.15–0.8 MPa, −20 to 70 °C, 40 µm filtration. Verify flow/load, pilot supply/exhaust backpressure; apply lower component limits.

UN54D flame-resistant tubing: 1 MPa at 23 °C, -20 to 70 °C; UN54D080050100MBU: 8 × 5 mm, min. bend radius 18 mm; UN54D100065100MBU: 10 × 6.5 mm, min. bend radius 20 mm. US98A tubing: 1 MPa at 23 °C, -20 to 70 °C; US98A160110100MBU: 16 × 11 mm, min. bend radius 80 mm; burst reference 3 MPa at 23 °C is not working pressure; reference mass 10.03 kg/100 m. All are blue 100 m coils; derate pressure above 23 °C. UN54D flame-resistant does not mean fireproof. Match exact OD, ID, tube compatibility and bend radius; PA6/PA12 sizes 8 × 5 and 10 × 6.5 mm are not established here.

M5 and 4M NAMUR have separate valve interfaces, not direct SAI mounts. No unverified direct adapter or complete kit is specified.

Listed PT/G valves are separate references, not NPT variants. Metric tubes do not fit listed inch sockets; select a separately verified complete inch-tube path.

The 16 × 11 mm tube is documented; a complete 16 mm fitting/control path is unestablished. Do not substitute smaller fittings or invent tube codes.

Circuit-Sizing Reference

Theoretical reference speed Flow-area and tube reference
300 mm/s 4.9 mm² effective flow area; 8 × 5 mm tube OD × ID
400 mm/s 6.5 mm² effective flow area; 8 × 5 mm tube OD × ID
500 mm/s 8.1 mm² effective flow area; 10 × 6.5 mm tube OD × ID
600 mm/s 9.7 mm² effective flow area; 10 × 6.5 mm tube OD × ID
700 mm/s 11.4 mm² effective flow area; 10 × 6.5 mm tube OD × ID
800 mm/s 13 mm² effective flow area; 16 × 11 mm tube OD × ID

Generic bore references, not measured SAI speeds. Flow area is not piston area or rated valve flow. Pressure/tube length/load are unspecified; the 0.5 MPa force example does not apply. Obey the 30–800 mm/s cylinder limit, actual valve/fitting/tube flow, cushions and exhaust backpressure. Similar nominal sizes do not make metric tubes fit inch sockets.

Use the catalog above for dimensions, mounting drawings and symbol positions. Before installation, check full configuration, space and separately selected accessories.

Product form

Specifications: SAI63X502FAT — SAI series double-acting single-rod cylinder; 63 mm bore × 502 mm stroke; medium-carbon-steel rod; non-magnetic piston; front... Read more

SKU: SAI63X502FAT

$339.40 Incl. VAT

    Guaranteed secure & safe checkout.

    Ach Direct DebitAmazon American Express Apple Pay BizumDiners ClubDiscoverGoogle Pay Mastercard MB WAY PayPalSatispayShop Pay USDC Visa

    Bank transfer also available. Payment options may vary by location and device.

    Shipping, returns & order help

    Free shipping on orders US$30+ under 2 kg

    Import duties & taxes included on all orders

    Download: 3D model selection.
    Shipping & delivery times

    In-stock items: processed and shipped within 1–3 business days. Custom-made items: G/NPT threads and non-standard specifications require 7–15 business days of factory production before shipping.

    Standard international delivery typically takes 7–13 business days after dispatch, depending on customs clearance and the local delivery network. Processing or production time is additional. Next-day and overnight delivery are not available.

    Most products ship from our manufacturing centers in Asia, then transfer to a local carrier after customs clearance.

    Read our shipping policy
    Shipping costs & import taxes

    Free shipping: orders of US$30 or more weighing under 2 kg. Import duties and taxes are included on all orders.

    If an overweight shipping surcharge applies after packing, we pause shipment and email you the amount for approval before dispatch. This is a transport charge, not an import tax. If you do not reply within 7 days, the order is canceled and fully refunded.

    Shipping charges and tax details
    Model selection & custom orders

    Please check the full model number, dimensions, thread type, stroke and voltage where applicable before ordering. If you are unsure, email airtacs@airtacs.com with the model number and required specifications.

    Custom-made products, including G/NPT thread specifications and custom-built parts, are non-returnable and non-refundable under our refund policy.

    Read the refund policy before ordering
    Tracking & delivery support

    Use the tracking link in your shipping confirmation email. For YunExpress shipments, enter your YT tracking number at Yuntrack to view the journey and local delivery details.

    Provide a complete physical delivery address and reachable contact details. P.O. boxes and virtual mail-forwarding addresses are not accepted.

    If delivery fails, contact the local carrier and email airtacs@airtacs.com with your order and tracking numbers. For failures caused by an incorrect/incomplete address or an unreachable recipient, return to the local warehouse typically takes 7–30 business days. Redelivery requires an additional shipping fee; cancellation after failed delivery is subject to deductions for original shipping and carrier return fees.

    Delivery issue policy
    Returns & product issues

    Eligible returns are accepted within 7 days of delivery. Items must be unused, uninstalled and in their original factory packaging. Contact airtacs@airtacs.com for a Return Authorization (RA) number before returning anything.

    Ordered the wrong model or changed your mind? You pay return shipping, original shipping is non-refundable, and a 50% restocking fee is deducted from the actual price paid for the returned product.

    Defective, damaged or incorrect item? We provide a replacement and cover return shipping; no restocking fee applies. Custom-made items are excluded from standard returns. These terms are subject to applicable law and do not limit your statutory rights.

    Read the full refund policy
    Bank transfers & invoices

    Bank transfer: Select bank transfer at checkout and submit your order. The bank account details and payment instructions will then be displayed.

    Invoices: Invoices are available only after an order is placed. We are a US-based company and provide a standard commercial invoice, not an EU VAT tax invoice. If your company requires an EU VAT invoice, please confirm your requirements with us before ordering.

    For payment or invoice questions, email airtacs@airtacs.com with your order number.

    Description

    Specifications: SAI63X502FAT — SAI series double-acting single-rod cylinder; 63 mm bore × 502 mm stroke; medium-carbon-steel rod; non-magnetic piston; front flange mounting (FA); TPU seals; NPT3/8 ports (T).

    Product Catalog

    Download Airtac Product Catalog (PDF)

    For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.

    SI to SAI replacement guide

    Model Code Explained

    Code Meaning
    SAI Standard double-acting single-rod cylinder
    63 63 mm bore
    No rod-material code Medium-carbon steel
    X Separator before stroke
    502 502 mm stroke
    No magnet suffix Without built-in magnet
    FA Front flange mounting
    No seal suffix TPU seal option
    T NPT3/8 working ports

    Technical Specifications

    Parameter Value
    Model SAI63X502FAT
    Action Double acting, single rod
    Bore 63 mm
    Stroke 502 mm; Special stroke; confirm order and delivery conditions
    Piston rod material Medium-carbon steel
    Magnetic piston Without magnet
    Mounting selection Front flange mounting
    Seal option TPU
    Working ports NPT3/8; two working air ports
    Working medium Air filtered to 40 µm or finer
    Operating pressure 0.15–1 MPa (1.5–10 bar; approximately 22–145 psi)
    Proof pressure 1.5 MPa (15 bar); not continuous operating pressure
    Temperature -20 to 70 °C; apply the complete system limits
    Piston speed 30–800 mm/s
    Stroke tolerance +1.5 / -0 mm
    Cushioning Adjustable pneumatic cushion; 30 mm nominal cushion reference
    Rod diameter / end thread 20 mm / M16×1.5
    Cylinder reference weight 4251.28 g; catalog calculation, not measured shipping weight

    Reference weight = 1495.3 + 5.49 × 502 g, decimal grams, from the matching non-magnetic SAI single-rod base. A/B rod and H/N seal mass differences are unquantified: not certified variant mass. Excludes brackets, rod joints, sensors and packaging; actual weight prevails.

    The 30 mm nominal cushion distance does not guarantee usable deceleration length for shorter strokes. Verify actual load/speed performance.

    Features and Operation

    ISO15552 standard cylinder, formerly ISO6431.

    Compact special-shaped bidirectional piston sealing structure with oil storage.

    Corrosion-resistant profiled aluminium tube; no tie rods; external sensor grooves.

    Stable adjustable pneumatic cushioning.

    Multiple cylinder variants and mounting accessories available.

    External and Mounting Dimensions

    A+stroke ends at rear-cover face; overall formulas add rear boss NA once. Bare body excludes accessories, sensors, joints and packaging. Magnetic/nonmagnetic dimensions match. Drawing-specific symbols are not extra overall dimensions. Numbers are mm; threads are explicit. For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.

    Basic dimension / drawing symbol Dimension (mm) / thread
    Illustrated A + stroke to rear-cover face 692 mm = 190 + 502
    Body face span: AC + stroke 623 mm = 121 + 502
    Derived bare retracted length: A + stroke + NA 696 mm = 190 + 502 + 4
    Derived bare extended length: A + 2 × stroke + NA 1198 mm = 190 + 2 × 502 + 4
    Body cross-section 75 × 75 mm
    Base drawing symbols A=190 mm before adding the actual stroke;AB=69;AC=121 mm before adding the actual stroke;AD=33;AE=33;B=75;D=20;DA=42;E=M16×1.5;EA=32;F=23;FA=8;M=45;MA=27;H=17;K=M8;KA=17;KB=56.5;N=45;NA=4;P=NPT3/8;PA=16.5;PB=7.5

    Selected Mounting Dimensions

    Accessory / drawing symbols Dimension (mm) / thread
    FA — Front flange mounting; F-SI63FA A + stroke=692 = 190 + 502;C + stroke=623 = 121 + 502;BA=45.5;BB=12;BC=75;BD=50;BE=118;BF=100;BP=9;T=56.5

    Mounting and Rod-End Accessories

    Mounting option Part code and material
    LB — Axial foot mounting F-SI63LB; Low-carbon steel
    FA — Front flange mounting F-SI63FA; Aluminium alloy
    CA — Single rear clevis F-SE63CA; Ductile cast iron
    CB — Double rear clevis F-SE63CB; Ductile cast iron
    CR — Single clevis connection F-SI63CR; Ductile cast iron
    TC — Intermediate trunnion mounting F-SAI63TC; Ductile cast iron
    FTC — Front-cover trunnion mounting F-SI63FTC; Ductile cast iron
    TCM1 — Trunnion support type 1 F-SI63TCM1; Ductile cast iron
    TCM2 — Trunnion support type 2 F-SI63TCM2; Aluminium alloy
    FB — Rear flange mounting F-SI63FA; Aluminium alloy

    FA/FB share a flange plate at different positions. CR requires CB. TC/FTC need the listed TCM1/TCM2: support size numbers may differ from bore. Confirm package and fasteners.

    TC is adjustable and separately orderable for this bore. Drawing-reference support centers: position for actual load.

    TC locking torque: 4–6 N·m; static holding-force reference: 3000 N, not cylinder thrust or payload. Above this, specify factory nonstandard fixed TC. Place bracket on barrel ledges and position it. Pre-tighten; check bracket and barrel sloping faces contact. 50–125: tighten 8 black screws through pre-, intermediate and final tightening, then tighten 8 white screws.

    Drawing holes: LB 4 AP; FA/FB 4 BP; CR 4 K through-holes and 4 L counterbores; TCM1 4 E; TCM2 4 L through-holes and 4 K counterbores. CA DQ/CB CP tolerance: ±0.1 mm. Hole counts do not specify supplied fastener quantities.

    Rod-End Joint Dimensions

    Joint / drawing symbol Dimension (mm) / thread / angle
    I joint — F-M16X150I NC=16;ND=64;NE=82;NF=32;NG=23;NH=M16×1.5;NM=16;Reference weight=312 g
    Y clevis joint — F-M16X150Y NA=32;NC=16;ND=64;NP=32;NQ=80;NM=16;NH=M16×1.5;PA=39;PB=32.8;Reference weight=367.5 g
    Floating joint — F-M16X150F MA=90;MB=27;MC=10;MD=41;ME=44.5;MF=19;MG=8;MH=17;MI_MJ=M16×1.5;MK=7°;Reference weight=543 g
    Spherical rod-end joint — F-M16X150U PA=15;PB=40;PC=16;PD=28;PE=64;PF=84;PG=M16×1.5;PH=15°;PI=27;PJ=22;PK=21;Reference weight=204 g

    M16×1.5 rod joints use the carbon-steel catalog category; subparts/finishes are unspecified. Select joints/guides for load. Joint mass is excluded from cylinder weight. Y drawing: no separate pin-kit code or guaranteed kit count.

    Force and Application

    Parameter Value
    Extension effective area 3117 mm²; catalog rounded single-rod area
    Extension at 0.5 MPa 1558.5 N theoretical
    Retraction effective area 2803 mm²; catalog rounded single-rod area
    Retraction at 0.5 MPa 1401.5 N theoretical

    Theoretical axial force = effective area (mm²) × pressure (MPa), before friction/losses. Rod area reduces retraction area. Not safe working loads or guaranteed payloads.

    Installation and Maintenance

    Qualified personnel only. Before maintenance: secure loads, guard motion, isolate power/air and release residual pressure. Prevent unexpected restart motion; design for power/air loss.

    Use clean, dry air filtered ≤40 µm; remove water, degraded oil and debris. Protect from dust, corrosion, coolant, weld spatter, vibration, heat and freezing; assess unusually dry air. Strong magnetic fields affect sensing.

    Start unloaded; increase load gradually. Align rod/load; guide against side load, bending, impact and torque. Check long-stroke buckling, sag, support and air use. Rod joints do not replace guides.

    Load-ratio guidance: ≤0.7 static/low speed; ≤0.5 at 50–500 mm/s; ≤0.3 above 500 mm/s. Not structural safety factors or payload guarantees; obey cylinder pressure/speed limits.

    Fit flow controls at both ports; double action normally uses meter-out. Start closed; open gradually. Set cushions for load/speed without forcing screws. Heavy/fast loads may need an external absorber or deceleration circuit.

    Compressibility/leakage defeat assumed precise prolonged closed-center stops or automatic multi-cylinder synchronization. Swing links need CA/CB/TC pivots, not rigid LB mounts forced through arcs. Match flange direction/support height to load.

    Normally no added oil is needed. Once introduced, continuously use additive-free ISO-VG32 turbine oil. Oil-mist guide: ≤25 mg/m³; 0.5–5 drops per 1000 L. Size lubricator for flow; avoid excess/incompatible oil.

    Clean pipes; keep sealant off leading threads. Start required tape 1.5–2 threads back. Verify tube pressure/temperature, OD/ID and bend radius. Hot spatter may require metal/flame-resistant tubing.

    Protect sliding surfaces; periodically operate stored cylinders and prevent corrosion. Use the lowest cylinder/fitting/valve/tube/sensor/cable limit; temperature options do not raise other ratings.

    Internal Components — SAI Catalog Reference

    Item Material reference
    1. Nut Carbon steel / stainless steel
    2. Piston rod S45C hard-chrome-plated ground bar / stainless steel
    3. Front-cover O-ring TPU
    4. Front cover Aluminium alloy
    5. Bushing Wear-resistant material
    6. Cushion O-ring TPU
    7. Barrel Aluminium alloy
    8. Piston-rod O-ring NBR
    9. Piston Aluminium alloy
    10. Piston O-ring NBR
    11. Wear ring Wear-resistant material
    12. Magnet Not fitted in this non-magnetic cylinder. Catalog magnetic-version reference: Plastic type for bores100 and below; rubber type for other bores
    13. Hexagon socket bolt Carbon steel
    14. Cushion seal TPU
    15. Rear cover Aluminium alloy
    16. Support screw cap Carbon steel / stainless steel

    SAI structure reference, not an option material certificate. Ordered rod/seal choices prevail: A/B is not an all-stainless cylinder; a seal option does not replace every elastomer.

    Series Ordering Options

    Parameter Value
    Rod material choices Blank: Medium-carbon steel; A: SUS420J2 stainless steel; B: SUS304 stainless steel
    Seal choices Blank: TPU; H: Fluororubber; N: NBR
    Magnet choice Blank: no magnet; S: magnet fitted, sensors separately selected
    Thread choices PT, G or NPT as specified by the actual order; do not mix thread standards
    Catalog standard strokes 25, 50, 75, 80, 100, 125, 150, 160, 175, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000 mm
    Maximum / allowable stroke 1500 / 1800 mm; separate catalog limits, not a list of all standard strokes
    Stroke tolerance bands 0–250 mm: +1 / -0 mm; 251–1000 mm: +1.5 / -0 mm; 1001–1500 mm: +2 / -0 mm; above 1500 mm not specified

    Series alternatives are not simultaneous features. Confirm special strokes/unlisted combinations. Retain the full model; separately select mounts, joints, sensors and circuit parts.

    Magnetic Sensing

    This model has no built-in magnet. DMSE and CMSE magnetic sensors are not applicable to this piston as ordered; adding a sensor does not add a magnet. A separately confirmed magnetic cylinder configuration is required for magnetic detection.

    Connection and Tube-Side Options

    Separately selected component Complete ordering codes; tube dimensions as labelled
    NPC straight 1/4 in OD: NPC1/4-3/8; 5/16 in OD: NPC5/16-3/8; 3/8 in OD: NPC3/8-3/8; 1/2 in OD: NPC1/2-3/8
    NPL elbow 1/4 in OD: NPL1/4-3/8; 5/16 in OD: NPL5/16-3/8; 3/8 in OD: NPL3/8-3/8; 1/2 in OD: NPL1/2-3/8
    NPLL extended elbow — discontinued reference 1/4 in OD: NPLL1/4-3/8; 5/16 in OD: NPLL5/16-3/8; 3/8 in OD: NPLL3/8-3/8; 1/2 in OD: NPLL1/2-3/8
    NPEB branch tee 1/4 in OD: NPEB1/4-3/8; 5/16 in OD: NPEB5/16-3/8; 3/8 in OD: NPEB3/8-3/8; 1/2 in OD: NPEB1/2-3/8
    NPED run tee 1/4 in OD: NPED1/4-3/8; 5/16 in OD: NPED5/16-3/8; 3/8 in OD: NPED3/8-3/8; 1/2 in OD: NPED1/2-3/8
    NPYB Y fitting 1/4 in OD: NPYB1/4-3/8; 5/16 in OD: NPYB5/16-3/8; 3/8 in OD: NPYB3/8-3/8; 1/2 in OD: NPYB1/2-3/8
    NPH banjo elbow — discontinued reference 1/4 in OD: NPH1/4-3/8; 5/16 in OD: NPH5/16-3/8; 3/8 in OD: NPH3/8-3/8; 1/2 in OD: NPH1/2-3/8
    NPHF female-branch banjo — discontinued reference 1/4 in OD: NPHF1/4-3/8; 5/16 in OD: NPHF5/16-3/8; 3/8 in OD: NPHF3/8-3/8; 1/2 in OD: NPHF1/2-3/8
    NPHW twin banjo — discontinued reference 1/4 in OD: NPHW1/4-3/8; 5/16 in OD: NPHW5/16-3/8; 3/8 in OD: NPHW3/8-3/8; 1/2 in OD: NPHW1/2-3/8
    NPZB cross fitting — discontinued reference 1/4 in OD: NPZB1/4-3/8; 5/16 in OD: NPZB5/16-3/8; 3/8 in OD: NPZB3/8-3/8; 1/2 in OD: NPZB1/2-3/8
    NBPC metal straight — discontinued reference 1/4 in OD: NBPC1/4-3/8; 5/16 in OD: NBPC5/16-3/8; 3/8 in OD: NBPC3/8-3/8; 1/2 in OD: NBPC1/2-3/8
    NPKD reducing distributor — discontinued reference main 3/8 / branch 5/16 in OD: NPKD3/8-5/16-3/8
    NBKC compression fitting — discontinued reference 1/4 × 5/32 in OD × ID: NBKC1/4-5/32-3/8; 5/16 × 1/5 in OD × ID: NBKC5/16-1/5-3/8; 3/8 × 1/4 in OD × ID: NBKC3/8-1/4-3/8; 1/2 × 1/3 in OD × ID: NBKC1/2-1/3-3/8
    NBB male–male adapter — discontinued reference other end male NPT1/8: NBB1/8-3/8; other end male NPT1/4: NBB1/4-3/8; other end male NPT3/8: NBB3/8-3/8; other end male NPT1/2: NBB3/8-1/2
    NBD male–female adapter — discontinued reference other end female NPT1/8: NBD1/8-3/8; other end female NPT1/4: NBD1/4-3/8
    NBZ unused auxiliary plug NBZ3/8
    NBSL valve-exhaust silencer NBSL3/8
    NBSLM miniature valve-exhaust silencer NBSLM3/8
    NBESL adjustable valve-exhaust silencer — discontinued reference NBESL3/8
    NPTL push-lock flow control 1/4 in OD: NPTL1/4-3/8A,NPTL1/4-3/8B; 5/16 in OD: NPTL5/16-3/8A,NPTL5/16-3/8B; 3/8 in OD: NPTL3/8-3/8A,NPTL3/8-3/8B; 1/2 in OD: NPTL1/2-3/8A,NPTL1/2-3/8B
    NPSS universal flow control — discontinued reference 3/8 in OD: NPSS3/8-3/8A,NPSS3/8-3/8B; 1/2 in OD: NPSS1/2-3/8A,NPSS1/2-3/8B
    NPSA tube-to-tube flow control 1/4 in OD: NPSA1/4; 5/16 in OD: NPSA5/16; 3/8 in OD: NPSA3/8; 1/2 in OD: NPSA1/2
    ASC separate inline flow control two female NPT3/8: ASC30010T
    GAFR upstream filter/regulator female NPT3/8: GAFR30010ST,GAFR40010ST

    Separate options; not an included kit or stock promise. Connect both SAI63 working ports with NPT3/8 fittings/correct seals; check insertion depth, tool/rotation clearance, flow and tube loads. PT/G/NPT are not interchangeable. The M16×1.5 rod thread is not an air port.

    Discontinued families are historical references; confirm remaining availability or approved replacements before ordering.

    Use suitable soft nylon/PU; match exact OD and compression-fitting ID. Inch tube sizes are exact: 1/4 = 6.35, 5/16 = 7.9375, 3/8 = 9.525 and 1/2 = 12.7 mm; do not substitute nominal metric sizes. NPHF has male RA/extra female RB of NPT3/8; connect or permissibly seal RB, not a tube socket. Tees/Y/cross/distributors must not bridge chambers or unrelated controls.

    Standard push-in fittings, direct/threadless controls and listed silencers: 0–1 MPa, −20–70 °C. NBPC: 0–1 MPa, 0–150 °C; SAI pressure path 0.15–1 MPa. NBKC/NBB/NBD/NBZ: 0–1 MPa, 0–150 °C; SAI pressure path 0.15–1 MPa. General cylinder −20–70 °C with 0–150 °C parts gives 0–70 °C or narrower. Apply lower valve/tube/sensor limits; component vacuum data do not rate a vacuum cylinder. NBPC does not share the metric BPC 0.9 MPa limit.

    Install threads using the body hex, not locking nut; fully insert tube before tightening. NBB/NBD are same-standard adapters: BB male–male, BD male–female; table labels the other end. Match gender/size/flow; no cross-thread conversion. NBZ closes permitted unused auxiliary ports only, never active cylinder ports.

    Cylinder-end A controls thread→tube exhaust (meter-out), with free reverse supply; B controls tube→cylinder supply (meter-in). A is usual for double action; B needs a designed meter-in circuit. Start closed/open slowly. Closed leakage is allowed: not safety shutoffs. NPTL caps on 3/8-port variants: limit: 0.24 N·m, not pipe-thread torque. Do not force caps/end stops. NPSA is an inch tube-to-tube control without A/B suffixes; match both ODs/check-throttle symbol.

    Listed silencers serve separate valve exhaust: match thread/flow/backpressure. Not cylinder-port fittings, inlet filters or shutoffs. NBESL adjustment changes backpressure.

    ASC30010T: separate two-female-NPT3/8-port inline control; needs male fittings. Follow P/A/check-throttle symbol. 0.05–0.95 MPa, −20–70 °C and 40 µm-or-finer filtered air; SAI pressure path 0.15–0.95 MPa before lower limits. Rated flow is not guaranteed cylinder speed.

    GAFR30010ST,GAFR40010ST: separate upstream NPT3/8 filter/regulator: 40 µm, PC bowl, differential/manual drain, bracket/round gauge, no reverse-flow valve. Inlet ≤1 MPa, setting 0.15–0.9 MPa, −5–70 °C non-freezing. Respect IN/OUT, flow/pressure loss, condensate, bowl environment and downstream limits. Not cylinder-mounted or a vacuum regulator.

    Match separate inch tubing and both endpoints. Metric coils, PSA/GPSA and PPA are not specified for inch sockets. Match coil length and tube pressure/temperature to the circuit.

    Separate Directional-Valve and Tube Examples

    4A PT: single control 4A21008, 4A31008, 4A31010; double control 4A22008, 4A32008, 4A32010. 4A G: single control 4A21008G, 4A31008G, 4A31010G; double control 4A22008G, 4A32008G, 4A32010G. 4V PT: single control 4V21008B, 4V31008B, 4V31010B; double control 4V22008B, 4V32008B, 4V32010B. 4V G: single control 4V21008BG, 4V31008BG, 4V31010BG; double control 4V22008BG, 4V32008BG, 4V32010BG. 5V PT: single control 5V21008B050, 5V31008B050, 5V31010B050; double control 5V22008B050, 5V32008B050, 5V32010B050. All listed B versions use DC24V. 4V has DIN entry and internal pilot; 5V has 0.5 m leads (050) and internal pilot. 4A has single/double pneumatic control, external pilot supply and no coil. 4A configurations 20008/30008/30010: single control has one PT1/8 pilot port, double has two; confirm pilot threads on G versions.

    20008 (G: 4A/4V; PT: 4A/4V/5V): P 1/4, A/B 1/4, R/S 1/8; 30008 (G: 4A/4V; PT: 4A/4V/5V): P/A/B/R/S 1/4; 30010 (G: 4A/4V; PT: 4A/4V/5V): P 3/8, A/B 3/8, R/S 1/4. Ports use the assigned PT/G thread; select endpoints independently. Separate piped valve examples, not direct cylinder fittings or included parts. Operating range: 0.15–0.8 MPa, −20 to 70 °C, 40 µm filtration. Verify flow/load, pilot supply/exhaust backpressure; apply lower component limits.

    UN54D flame-resistant tubing: 1 MPa at 23 °C, -20 to 70 °C; UN54D080050100MBU: 8 × 5 mm, min. bend radius 18 mm; UN54D100065100MBU: 10 × 6.5 mm, min. bend radius 20 mm. US98A tubing: 1 MPa at 23 °C, -20 to 70 °C; US98A160110100MBU: 16 × 11 mm, min. bend radius 80 mm; burst reference 3 MPa at 23 °C is not working pressure; reference mass 10.03 kg/100 m. All are blue 100 m coils; derate pressure above 23 °C. UN54D flame-resistant does not mean fireproof. Match exact OD, ID, tube compatibility and bend radius; PA6/PA12 sizes 8 × 5 and 10 × 6.5 mm are not established here.

    M5 and 4M NAMUR have separate valve interfaces, not direct SAI mounts. No unverified direct adapter or complete kit is specified.

    Listed PT/G valves are separate references, not NPT variants. Metric tubes do not fit listed inch sockets; select a separately verified complete inch-tube path.

    The 16 × 11 mm tube is documented; a complete 16 mm fitting/control path is unestablished. Do not substitute smaller fittings or invent tube codes.

    Circuit-Sizing Reference

    Theoretical reference speed Flow-area and tube reference
    300 mm/s 4.9 mm² effective flow area; 8 × 5 mm tube OD × ID
    400 mm/s 6.5 mm² effective flow area; 8 × 5 mm tube OD × ID
    500 mm/s 8.1 mm² effective flow area; 10 × 6.5 mm tube OD × ID
    600 mm/s 9.7 mm² effective flow area; 10 × 6.5 mm tube OD × ID
    700 mm/s 11.4 mm² effective flow area; 10 × 6.5 mm tube OD × ID
    800 mm/s 13 mm² effective flow area; 16 × 11 mm tube OD × ID

    Generic bore references, not measured SAI speeds. Flow area is not piston area or rated valve flow. Pressure/tube length/load are unspecified; the 0.5 MPa force example does not apply. Obey the 30–800 mm/s cylinder limit, actual valve/fitting/tube flow, cushions and exhaust backpressure. Similar nominal sizes do not make metric tubes fit inch sockets.

    Use the catalog above for dimensions, mounting drawings and symbol positions. Before installation, check full configuration, space and separately selected accessories.

    Recently viewed products

      Footer image

      © 2026 Airtac, Powered by Shopify

      • US (USD $) US (USD $)
      • Ach Direct Debit
      • Amazon
      • American Express
      • Apple Pay
      • Bizum
      • Diners Club
      • Discover
      • Google Pay
      • Mastercard
      • MB WAY
      • PayPal
      • Satispay
      • Shop Pay
      • USDC
      • Visa