Airtac SAI series: standard cylinder - SAI125AX856SCAT

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

Description

Specifications: SAI125AX856SCAT — SAI series double-acting single-rod cylinder; 125 mm bore × 856 mm stroke; SUS420J2 rod (A); magnet fitted (S); single rear clevis (CA); TPU seals; NPT1/2 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
125 125 mm bore
A SUS420J2 stainless steel
X Separator before stroke
856 856 mm stroke
S Magnet fitted; sensor separately selected
CA Single rear clevis
No seal suffix TPU seal option
T NPT1/2 working ports

Technical Specifications

Parameter Value
Model SAI125AX856SCAT
Action Double acting, single rod
Bore 125 mm
Stroke 856 mm; Special stroke; confirm order and delivery conditions
Piston rod material SUS420J2 stainless steel
Magnetic piston With magnet; sensors separately selected
Mounting selection Single rear clevis
Seal option TPU
Working ports NPT1/2; 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 30–500 mm/s
Stroke tolerance +1.5 / -0 mm
Cushioning Adjustable pneumatic cushion; 40 mm nominal cushion reference
Rod diameter / end thread 32 mm / M27×2.0
Cylinder reference weight 18196.7 g; catalog calculation, not measured shipping weight

Reference weight = 5656.3 + 14.65 × 856 g, decimal grams, from the matching 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 40 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 1135 mm = 279 + 856
Body face span: AC + stroke 1016 mm = 160 + 856
Derived bare retracted length: A + stroke + NA 1139 mm = 279 + 856 + 4
Derived bare extended length: A + 2 × stroke + NA 1995 mm = 279 + 2 × 856 + 4
Body cross-section 140 × 140 mm
Base drawing symbols A=279 mm before adding the actual stroke;AB=119;AC=160 mm before adding the actual stroke;AD=46;AE=46;B=140;D=32;DA=74;E=M27×2.0;EA=54;F=41;FA=13.5;M=60;MA=45;H=27;K=M12;KA=22;KB=110;N=60;NA=4;P=NPT1/2;PA=23;PB=14

Selected Mounting Dimensions

Accessory / drawing symbols Dimension (mm) / thread
CA — Single rear clevis; F-SE125CA A + stroke=1135 = 279 + 856;C + stroke=1016 = 160 + 856;S=134;T=110;DC=50;DD=24;DE=25;DJ=33;DQ=69.7

Mounting and Rod-End Accessories

Mounting option Part code and material
LB — Axial foot mounting F-SI125LB; Ductile cast iron
FA — Front flange mounting F-SI125FA; Ductile cast iron
CA — Single rear clevis F-SE125CA; Ductile cast iron
CB — Double rear clevis F-SE125CB; Ductile cast iron
CR — Single clevis connection F-SI125CR; Ductile cast iron
TC — Intermediate trunnion mounting F-SAI125TC; Ductile cast iron
FTC — Front-cover trunnion mounting F-SI125FTC; Ductile cast iron
TCM1 — Trunnion support type 1 F-SI125TCM1; Ductile cast iron
TCM2 — Trunnion support type 2 F-SI125TCM2; Aluminium alloy
FB — Rear flange mounting F-SI125FA; Ductile cast iron

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: 10–12 N·m; static holding-force reference: 12000 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-M27X200I NC=30;ND=110;NE=139;NF=51;NG=45;NH=M27×2;NM=30;Reference weight=1201 g
Y clevis joint — F-M27X200Y NA=54;NC=30;ND=110;NP=55;NQ=139;NM=30;NH=M27×2;PA=64.2;PB=54.8;Reference weight=1473 g
Floating joint — F-M27X200F MA=136.5;MB=40;MC=14.5;MD=52.5;ME=59.5;MF=40;MG=13.5;MH=27;MI_MJ=M27×2;MK=5°;Reference weight=1470 g
Spherical rod-end joint — F-M27X200U PA=25;PB=70;PC=30;PD=51;PE=110;PF=145;PG=M27×2;PH=15°;PI=50;PJ=41;PK=37;Reference weight=1210 g

M27×2.0 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 12272 mm²; catalog rounded single-rod area
Extension at 0.5 MPa 6136 N theoretical
Retraction effective area 11468 mm²; catalog rounded single-rod area
Retraction at 0.5 MPa 5734 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 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 Sensors and Connection Leads

Magnetic S: E-profile DMSE electronic/CMSE reed sensors fit the barrel groove directly; no tie-rod holder. Select position/circuit. Sensors and mating leads are separate; S specifies no quantity.

Sensor / separate lead Complete ordering choices
DMSE two-wire standard: DMSE-020,DMSE-030,DMSE-050,DMSE-100,DMSE-M08,DMSE-M08010,DMSE-M08020,DMSE-M08030,DMSE-M12,DMSE-M12010,DMSE-M12020,DMSE-M12030; W: DMSE-020-W,DMSE-030-W,DMSE-050-W,DMSE-100-W; A05: A05-DMSE-020,A05-DMSE-030,A05-DMSE-050,A05-DMSE-100; A06: A06-DMSE-020,A06-DMSE-030,A06-DMSE-050,A06-DMSE-100
DMSE NPN three-wire standard: DMSE-N020,DMSE-N030,DMSE-N050,DMSE-N100,DMSE-NM08,DMSE-NM08010,DMSE-NM08020,DMSE-NM08030,DMSE-NM12,DMSE-NM12010,DMSE-NM12020,DMSE-NM12030; W: DMSE-N020-W,DMSE-N030-W,DMSE-N050-W,DMSE-N100-W
DMSE PNP three-wire standard: DMSE-P020,DMSE-P030,DMSE-P050,DMSE-P100,DMSE-PM08,DMSE-PM08010,DMSE-PM08020,DMSE-PM08030,DMSE-PM12,DMSE-PM12010,DMSE-PM12020,DMSE-PM12030; W: DMSE-P020-W,DMSE-P030-W,DMSE-P050-W,DMSE-P100-W
CMSE two-wire reed standard: CMSE-020,CMSE-030,CMSE-050,CMSE-100,CMSE-M08,CMSE-M08010,CMSE-M08020,CMSE-M08030,CMSE-M12,CMSE-M12010,CMSE-M12020,CMSE-M12030; H: CMSE-020-H,CMSE-030-H,CMSE-050-H,CMSE-100-H,CMSE-M08-H,CMSE-M08010-H,CMSE-M08020-H,CMSE-M08030-H,CMSE-M12-H,CMSE-M12010-H,CMSE-M12020-H,CMSE-M12030-H; A05: A05-CMSE-020,A05-CMSE-030,A05-CMSE-050,A05-CMSE-100
M8 female lead, 2 wires 2 m: F-ECM08B020; 3 m: F-ECM08B030; 5 m: F-ECM08B050; 10 m: F-ECM08B100
M8 female lead, 3 wires 2 m: F-ECM08C020; 3 m: F-ECM08C030; 5 m: F-ECM08C050; 10 m: F-ECM08C100
M12 female lead, 2 wires 2 m: F-ECM12B020; 3 m: F-ECM12B030; 5 m: F-ECM12B050; 10 m: F-ECM12B100
M12 female lead, 3 wires 2 m: F-ECM12C020; 3 m: F-ECM12C030; 5 m: F-ECM12C050; 10 m: F-ECM12C100
Electrical / physical reference Limits and conditions
DMSE two-wire 10–28 V DC; 2.5–100 mA load; ≤2.8 W; internal current ≤3 mA; residual voltage ≤3.5 V; leakage ≤0.06 mA.
DMSE NPN/PNP three-wire 5–30 V DC; switching ≤30 V and ≤200 mA, capacity ≤6 W; internal current ≤5 mA; residual voltage ≤0.7 V; leakage ≤0.01 mA.
CMSE reed two-wire 5–240 V AC/DC; meet both ≤100 mA and ≤10 W. Standard residual voltage ≤2.5 V at DC 100 mA; H has no indicator or residual voltage shown. No internal/leakage current or protection circuit shown.
Frequency, shock and temperature DMSE ≤1000 Hz with reverse-polarity/surge protection; CMSE ≤200 Hz. Both: 50 G shock reference. Standard −10–70 °C; CMSE-H −10–125 °C. Sensor H does not raise the cylinder, cable or connector rating.
E-profile body dimensions DMSE length 25, height 4.7 mm; CMSE length 26.8, height 5.3 mm. Both: cross-section width 6.3, upper width 5.2 mm.

Direct leads: 020/030/050/100 = 2/3/5/10 m. M08/M12: M8/M12 male, 0.5 m lead; M08010/020/030 and M12010/020/030: 1/2/3 m. Lead length is unrelated to stroke. Blank: two-wire; N/P: NPN/PNP.

DMSE standard/A05: IP64; W/A06: IP68. All CMSE: IP64. A05: flex-resistant robot cable; A06: oil-/flex-resistant. A05/A06: two-wire direct leads only, 19 mm minimum bend radius. No W quick-connector, A05/A06-W, CMSE-W, CMSE-A06 or A05-CMSE-H option is listed.

Match M8/M12 female leads: B two-wire/C three-wire. Pins: two-wire 1 brown (+), 4 blue (−), 3 unused; three-wire 1 brown (+), 3 blue (−), 4 black output. Direct leads need no quick cable. Cable temperature/IP/voltage ratings unspecified; sensor-body ratings do not rate the whole assembly.

Three-wire NPN: load between positive/black output; PNP: black output/negative. Check residual voltage/leakage for PLC inputs and series/parallel circuits. Simultaneous series sensing lights LEDs together; PLC compatibility is not universal.

Insert E-profile sensor in the matching groove, screw clear of the bottom face; position near the switching-range middle, then tighten. Recommended torque 0.15–0.20 N·m; maximum 0.25 N·m.

Connect correct load/supply before energizing; never place two-wire sensors across supply without load. Insulate leads; separate from high-voltage/power wiring. Prevent repeated strain, impact and strong magnetic interference.

Periodically check fixing, cables and indication. Waterproof does not guarantee prolonged immersion; protect from oil, chemicals, weld spatter, rapid temperature cycling and dense magnetic material.

H cylinder seals and CMS sensor H are separate options. SAI general range: −20 to 70 °C; full H-cylinder range is unestablished. Apply actual cylinder/sensor/cable/connector limits together.

Connection and Tube-Side Options

Separately selected component Complete ordering codes; tube dimensions as labelled
NPC straight 3/8 in OD: NPC3/8-1/2; 1/2 in OD: NPC1/2-1/2
NPL elbow 3/8 in OD: NPL3/8-1/2; 1/2 in OD: NPL1/2-1/2
NPLL extended elbow — discontinued reference 3/8 in OD: NPLL3/8-1/2; 1/2 in OD: NPLL1/2-1/2
NPEB branch tee 3/8 in OD: NPEB3/8-1/2; 1/2 in OD: NPEB1/2-1/2
NPED run tee 3/8 in OD: NPED3/8-1/2; 1/2 in OD: NPED1/2-1/2
NPYB Y fitting 3/8 in OD: NPYB3/8-1/2; 1/2 in OD: NPYB1/2-1/2
NPH banjo elbow — discontinued reference 3/8 in OD: NPH3/8-1/2; 1/2 in OD: NPH1/2-1/2
NPHF female-branch banjo — discontinued reference 3/8 in OD: NPHF3/8-1/2; 1/2 in OD: NPHF1/2-1/2
NPHW twin banjo — discontinued reference 3/8 in OD: NPHW3/8-1/2; 1/2 in OD: NPHW1/2-1/2
NPZB cross fitting — discontinued reference 3/8 in OD: NPZB3/8-1/2; 1/2 in OD: NPZB1/2-1/2
NBPC metal straight — discontinued reference 3/8 in OD: NBPC3/8-1/2; 1/2 in OD: NBPC1/2-1/2
NBKC compression fitting — discontinued reference 3/8 × 1/4 in OD × ID: NBKC3/8-1/4-1/2; 1/2 × 1/3 in OD × ID: NBKC1/2-1/3-1/2
NBB male–male adapter — discontinued reference male NPT1/4 ↔ male NPT1/2: NBB1/4-1/2; male NPT3/8 ↔ male NPT1/2: NBB3/8-1/2; male NPT1/2 ↔ male NPT1/2: NBB1/2-1/2
NBD male–female adapter — discontinued reference female NPT1/8 ↔ male NPT1/2: NBD1/8-1/2; female NPT1/4 ↔ male NPT1/2: NBD1/4-1/2; female NPT3/8 ↔ male NPT1/2: NBD3/8-1/2
NBZ unused auxiliary plug NBZ1/2
NBSL valve-exhaust silencer NBSL1/2
NBSLM miniature valve-exhaust silencer NBSLM1/2
NBESL adjustable valve-exhaust silencer — discontinued reference NBESL1/2
NPTL push-lock flow control 5/16 in OD: NPTL5/16-1/2A,NPTL5/16-1/2B; 3/8 in OD: NPTL3/8-1/2A,NPTL3/8-1/2B; 1/2 in OD: NPTL1/2-1/2A,NPTL1/2-1/2B
NPSS universal flow control — discontinued reference 1/2 in OD: NPSS1/2-1/2A,NPSS1/2-1/2B
NPSA tube-to-tube flow control 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 NPT1/2: ASC30015T
GAFR upstream filter/regulator female NPT1/2: GAFR30015ST,GAFR40015ST

Separate options; not an included kit or stock promise. Connect both SAI125 working ports with NPT1/2 fittings/correct seals; check insertion depth, tool/rotation clearance, flow and tube loads. PT/G/NPT are not interchangeable. The M27×2.0 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 NPT1/2; 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. The printed 1/3 in compression ID is literal; do not round it to a metric tube. 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 1/2-port variants: limit: 0.32 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.

ASC30015T: separate two-female-NPT1/2-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.

GAFR30015ST,GAFR40015ST: separate upstream NPT1/2 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.

A 16 × 11 mm reference tube needs separately specified 16 mm endpoint fittings and controls; the listed inch sockets do not form that connection.

Separate Valve, Tube and Sizing Selection

No bore-specific valve/tube or speed-flow example is established here for this bore. Select separately from actual flow, pressure, temperature, thread, tube OD/ID, load and exhaust conditions; a smaller-bore example is not a validated substitute.

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

Product form

Specifications: SAI125AX856SCAT — SAI series double-acting single-rod cylinder; 125 mm bore × 856 mm stroke; SUS420J2 rod (A); magnet fitted... Read more

SKU: SAI125AX856SCAT

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    Description

    Specifications: SAI125AX856SCAT — SAI series double-acting single-rod cylinder; 125 mm bore × 856 mm stroke; SUS420J2 rod (A); magnet fitted (S); single rear clevis (CA); TPU seals; NPT1/2 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
    125 125 mm bore
    A SUS420J2 stainless steel
    X Separator before stroke
    856 856 mm stroke
    S Magnet fitted; sensor separately selected
    CA Single rear clevis
    No seal suffix TPU seal option
    T NPT1/2 working ports

    Technical Specifications

    Parameter Value
    Model SAI125AX856SCAT
    Action Double acting, single rod
    Bore 125 mm
    Stroke 856 mm; Special stroke; confirm order and delivery conditions
    Piston rod material SUS420J2 stainless steel
    Magnetic piston With magnet; sensors separately selected
    Mounting selection Single rear clevis
    Seal option TPU
    Working ports NPT1/2; 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 30–500 mm/s
    Stroke tolerance +1.5 / -0 mm
    Cushioning Adjustable pneumatic cushion; 40 mm nominal cushion reference
    Rod diameter / end thread 32 mm / M27×2.0
    Cylinder reference weight 18196.7 g; catalog calculation, not measured shipping weight

    Reference weight = 5656.3 + 14.65 × 856 g, decimal grams, from the matching 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 40 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 1135 mm = 279 + 856
    Body face span: AC + stroke 1016 mm = 160 + 856
    Derived bare retracted length: A + stroke + NA 1139 mm = 279 + 856 + 4
    Derived bare extended length: A + 2 × stroke + NA 1995 mm = 279 + 2 × 856 + 4
    Body cross-section 140 × 140 mm
    Base drawing symbols A=279 mm before adding the actual stroke;AB=119;AC=160 mm before adding the actual stroke;AD=46;AE=46;B=140;D=32;DA=74;E=M27×2.0;EA=54;F=41;FA=13.5;M=60;MA=45;H=27;K=M12;KA=22;KB=110;N=60;NA=4;P=NPT1/2;PA=23;PB=14

    Selected Mounting Dimensions

    Accessory / drawing symbols Dimension (mm) / thread
    CA — Single rear clevis; F-SE125CA A + stroke=1135 = 279 + 856;C + stroke=1016 = 160 + 856;S=134;T=110;DC=50;DD=24;DE=25;DJ=33;DQ=69.7

    Mounting and Rod-End Accessories

    Mounting option Part code and material
    LB — Axial foot mounting F-SI125LB; Ductile cast iron
    FA — Front flange mounting F-SI125FA; Ductile cast iron
    CA — Single rear clevis F-SE125CA; Ductile cast iron
    CB — Double rear clevis F-SE125CB; Ductile cast iron
    CR — Single clevis connection F-SI125CR; Ductile cast iron
    TC — Intermediate trunnion mounting F-SAI125TC; Ductile cast iron
    FTC — Front-cover trunnion mounting F-SI125FTC; Ductile cast iron
    TCM1 — Trunnion support type 1 F-SI125TCM1; Ductile cast iron
    TCM2 — Trunnion support type 2 F-SI125TCM2; Aluminium alloy
    FB — Rear flange mounting F-SI125FA; Ductile cast iron

    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: 10–12 N·m; static holding-force reference: 12000 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-M27X200I NC=30;ND=110;NE=139;NF=51;NG=45;NH=M27×2;NM=30;Reference weight=1201 g
    Y clevis joint — F-M27X200Y NA=54;NC=30;ND=110;NP=55;NQ=139;NM=30;NH=M27×2;PA=64.2;PB=54.8;Reference weight=1473 g
    Floating joint — F-M27X200F MA=136.5;MB=40;MC=14.5;MD=52.5;ME=59.5;MF=40;MG=13.5;MH=27;MI_MJ=M27×2;MK=5°;Reference weight=1470 g
    Spherical rod-end joint — F-M27X200U PA=25;PB=70;PC=30;PD=51;PE=110;PF=145;PG=M27×2;PH=15°;PI=50;PJ=41;PK=37;Reference weight=1210 g

    M27×2.0 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 12272 mm²; catalog rounded single-rod area
    Extension at 0.5 MPa 6136 N theoretical
    Retraction effective area 11468 mm²; catalog rounded single-rod area
    Retraction at 0.5 MPa 5734 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 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 Sensors and Connection Leads

    Magnetic S: E-profile DMSE electronic/CMSE reed sensors fit the barrel groove directly; no tie-rod holder. Select position/circuit. Sensors and mating leads are separate; S specifies no quantity.

    Sensor / separate lead Complete ordering choices
    DMSE two-wire standard: DMSE-020,DMSE-030,DMSE-050,DMSE-100,DMSE-M08,DMSE-M08010,DMSE-M08020,DMSE-M08030,DMSE-M12,DMSE-M12010,DMSE-M12020,DMSE-M12030; W: DMSE-020-W,DMSE-030-W,DMSE-050-W,DMSE-100-W; A05: A05-DMSE-020,A05-DMSE-030,A05-DMSE-050,A05-DMSE-100; A06: A06-DMSE-020,A06-DMSE-030,A06-DMSE-050,A06-DMSE-100
    DMSE NPN three-wire standard: DMSE-N020,DMSE-N030,DMSE-N050,DMSE-N100,DMSE-NM08,DMSE-NM08010,DMSE-NM08020,DMSE-NM08030,DMSE-NM12,DMSE-NM12010,DMSE-NM12020,DMSE-NM12030; W: DMSE-N020-W,DMSE-N030-W,DMSE-N050-W,DMSE-N100-W
    DMSE PNP three-wire standard: DMSE-P020,DMSE-P030,DMSE-P050,DMSE-P100,DMSE-PM08,DMSE-PM08010,DMSE-PM08020,DMSE-PM08030,DMSE-PM12,DMSE-PM12010,DMSE-PM12020,DMSE-PM12030; W: DMSE-P020-W,DMSE-P030-W,DMSE-P050-W,DMSE-P100-W
    CMSE two-wire reed standard: CMSE-020,CMSE-030,CMSE-050,CMSE-100,CMSE-M08,CMSE-M08010,CMSE-M08020,CMSE-M08030,CMSE-M12,CMSE-M12010,CMSE-M12020,CMSE-M12030; H: CMSE-020-H,CMSE-030-H,CMSE-050-H,CMSE-100-H,CMSE-M08-H,CMSE-M08010-H,CMSE-M08020-H,CMSE-M08030-H,CMSE-M12-H,CMSE-M12010-H,CMSE-M12020-H,CMSE-M12030-H; A05: A05-CMSE-020,A05-CMSE-030,A05-CMSE-050,A05-CMSE-100
    M8 female lead, 2 wires 2 m: F-ECM08B020; 3 m: F-ECM08B030; 5 m: F-ECM08B050; 10 m: F-ECM08B100
    M8 female lead, 3 wires 2 m: F-ECM08C020; 3 m: F-ECM08C030; 5 m: F-ECM08C050; 10 m: F-ECM08C100
    M12 female lead, 2 wires 2 m: F-ECM12B020; 3 m: F-ECM12B030; 5 m: F-ECM12B050; 10 m: F-ECM12B100
    M12 female lead, 3 wires 2 m: F-ECM12C020; 3 m: F-ECM12C030; 5 m: F-ECM12C050; 10 m: F-ECM12C100
    Electrical / physical reference Limits and conditions
    DMSE two-wire 10–28 V DC; 2.5–100 mA load; ≤2.8 W; internal current ≤3 mA; residual voltage ≤3.5 V; leakage ≤0.06 mA.
    DMSE NPN/PNP three-wire 5–30 V DC; switching ≤30 V and ≤200 mA, capacity ≤6 W; internal current ≤5 mA; residual voltage ≤0.7 V; leakage ≤0.01 mA.
    CMSE reed two-wire 5–240 V AC/DC; meet both ≤100 mA and ≤10 W. Standard residual voltage ≤2.5 V at DC 100 mA; H has no indicator or residual voltage shown. No internal/leakage current or protection circuit shown.
    Frequency, shock and temperature DMSE ≤1000 Hz with reverse-polarity/surge protection; CMSE ≤200 Hz. Both: 50 G shock reference. Standard −10–70 °C; CMSE-H −10–125 °C. Sensor H does not raise the cylinder, cable or connector rating.
    E-profile body dimensions DMSE length 25, height 4.7 mm; CMSE length 26.8, height 5.3 mm. Both: cross-section width 6.3, upper width 5.2 mm.

    Direct leads: 020/030/050/100 = 2/3/5/10 m. M08/M12: M8/M12 male, 0.5 m lead; M08010/020/030 and M12010/020/030: 1/2/3 m. Lead length is unrelated to stroke. Blank: two-wire; N/P: NPN/PNP.

    DMSE standard/A05: IP64; W/A06: IP68. All CMSE: IP64. A05: flex-resistant robot cable; A06: oil-/flex-resistant. A05/A06: two-wire direct leads only, 19 mm minimum bend radius. No W quick-connector, A05/A06-W, CMSE-W, CMSE-A06 or A05-CMSE-H option is listed.

    Match M8/M12 female leads: B two-wire/C three-wire. Pins: two-wire 1 brown (+), 4 blue (−), 3 unused; three-wire 1 brown (+), 3 blue (−), 4 black output. Direct leads need no quick cable. Cable temperature/IP/voltage ratings unspecified; sensor-body ratings do not rate the whole assembly.

    Three-wire NPN: load between positive/black output; PNP: black output/negative. Check residual voltage/leakage for PLC inputs and series/parallel circuits. Simultaneous series sensing lights LEDs together; PLC compatibility is not universal.

    Insert E-profile sensor in the matching groove, screw clear of the bottom face; position near the switching-range middle, then tighten. Recommended torque 0.15–0.20 N·m; maximum 0.25 N·m.

    Connect correct load/supply before energizing; never place two-wire sensors across supply without load. Insulate leads; separate from high-voltage/power wiring. Prevent repeated strain, impact and strong magnetic interference.

    Periodically check fixing, cables and indication. Waterproof does not guarantee prolonged immersion; protect from oil, chemicals, weld spatter, rapid temperature cycling and dense magnetic material.

    H cylinder seals and CMS sensor H are separate options. SAI general range: −20 to 70 °C; full H-cylinder range is unestablished. Apply actual cylinder/sensor/cable/connector limits together.

    Connection and Tube-Side Options

    Separately selected component Complete ordering codes; tube dimensions as labelled
    NPC straight 3/8 in OD: NPC3/8-1/2; 1/2 in OD: NPC1/2-1/2
    NPL elbow 3/8 in OD: NPL3/8-1/2; 1/2 in OD: NPL1/2-1/2
    NPLL extended elbow — discontinued reference 3/8 in OD: NPLL3/8-1/2; 1/2 in OD: NPLL1/2-1/2
    NPEB branch tee 3/8 in OD: NPEB3/8-1/2; 1/2 in OD: NPEB1/2-1/2
    NPED run tee 3/8 in OD: NPED3/8-1/2; 1/2 in OD: NPED1/2-1/2
    NPYB Y fitting 3/8 in OD: NPYB3/8-1/2; 1/2 in OD: NPYB1/2-1/2
    NPH banjo elbow — discontinued reference 3/8 in OD: NPH3/8-1/2; 1/2 in OD: NPH1/2-1/2
    NPHF female-branch banjo — discontinued reference 3/8 in OD: NPHF3/8-1/2; 1/2 in OD: NPHF1/2-1/2
    NPHW twin banjo — discontinued reference 3/8 in OD: NPHW3/8-1/2; 1/2 in OD: NPHW1/2-1/2
    NPZB cross fitting — discontinued reference 3/8 in OD: NPZB3/8-1/2; 1/2 in OD: NPZB1/2-1/2
    NBPC metal straight — discontinued reference 3/8 in OD: NBPC3/8-1/2; 1/2 in OD: NBPC1/2-1/2
    NBKC compression fitting — discontinued reference 3/8 × 1/4 in OD × ID: NBKC3/8-1/4-1/2; 1/2 × 1/3 in OD × ID: NBKC1/2-1/3-1/2
    NBB male–male adapter — discontinued reference male NPT1/4 ↔ male NPT1/2: NBB1/4-1/2; male NPT3/8 ↔ male NPT1/2: NBB3/8-1/2; male NPT1/2 ↔ male NPT1/2: NBB1/2-1/2
    NBD male–female adapter — discontinued reference female NPT1/8 ↔ male NPT1/2: NBD1/8-1/2; female NPT1/4 ↔ male NPT1/2: NBD1/4-1/2; female NPT3/8 ↔ male NPT1/2: NBD3/8-1/2
    NBZ unused auxiliary plug NBZ1/2
    NBSL valve-exhaust silencer NBSL1/2
    NBSLM miniature valve-exhaust silencer NBSLM1/2
    NBESL adjustable valve-exhaust silencer — discontinued reference NBESL1/2
    NPTL push-lock flow control 5/16 in OD: NPTL5/16-1/2A,NPTL5/16-1/2B; 3/8 in OD: NPTL3/8-1/2A,NPTL3/8-1/2B; 1/2 in OD: NPTL1/2-1/2A,NPTL1/2-1/2B
    NPSS universal flow control — discontinued reference 1/2 in OD: NPSS1/2-1/2A,NPSS1/2-1/2B
    NPSA tube-to-tube flow control 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 NPT1/2: ASC30015T
    GAFR upstream filter/regulator female NPT1/2: GAFR30015ST,GAFR40015ST

    Separate options; not an included kit or stock promise. Connect both SAI125 working ports with NPT1/2 fittings/correct seals; check insertion depth, tool/rotation clearance, flow and tube loads. PT/G/NPT are not interchangeable. The M27×2.0 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 NPT1/2; 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. The printed 1/3 in compression ID is literal; do not round it to a metric tube. 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 1/2-port variants: limit: 0.32 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.

    ASC30015T: separate two-female-NPT1/2-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.

    GAFR30015ST,GAFR40015ST: separate upstream NPT1/2 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.

    A 16 × 11 mm reference tube needs separately specified 16 mm endpoint fittings and controls; the listed inch sockets do not form that connection.

    Separate Valve, Tube and Sizing Selection

    No bore-specific valve/tube or speed-flow example is established here for this bore. Select separately from actual flow, pressure, temperature, thread, tube OD/ID, load and exhaust conditions; a smaller-bore example is not a validated substitute.

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

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