Specifications: SDA40X20B is an AirTAC double-acting cylinder with a 40 mm bore, 20 mm stroke, no magnetic option in the standard suffix position, and male-threaded rod end.
Product Catalog
Download Airtac Product Catalog (PDF)
Download 2022 cylinder installation and weight tables (PDF)
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Model Code Explained
Code
Meaning for This Model
SDA
double-acting cylinder
40
40 mm bore
X20
20 mm nominal stroke
Blank magnetic position
No magnetic piston selected by the standard order-code position
B
male-threaded rod end
Blank mounting suffix
No optional mounting bracket selected
Blank pipe-thread suffix
Metric connection at the small bores; PT is the standard pipe-thread option where a pipe port is used
Technical Specifications
Parameter
Details
Action
double-acting cylinder
Working medium
Air filtered through a 40 μm filter or finer
Operating pressure
0.15–1 MPa
Proof pressure
1.5 MPa; a proof-test rating, not the continuous operating limit
Ambient and fluid temperature
−20 to 70 °C
Piston speed
30–500 mm/s
Stroke tolerance
+1.0 / 0 mm up to 100 mm stroke; +1.5 / 0 mm above 100 mm
Cushioning
Bumper
Air connection
PT 1/8
Product Features
The body/rear-cover and piston/rod connections use a compact riveted construction.
The rolled and hard-anodized bore provides wear resistance.
The compact double-lip piston seal retains lubricant; switch grooves run around the body.
Dimensions for This Bore and Configuration
Dimensions are in millimeters unless a thread, angle or tolerance is stated. Letter labels follow the 148–153 printed-page drawings in the 2022 Chinese catalog. A base letter value is not automatically an overall length; use its stated stroke relationship.
Parameter
Details
A
33 mm
AC
26 mm
AB
7 mm
B
52 mm
BA
58.5 mm
D
16 mm
DA
4 mm
E
M8 × 1.25
EA
12 mm
H
14 mm
J
10.5 mm
JA
6.5 mm
K
M8 × 1.25
KA
20 mm
KB
40 mm
M
28 mm
MA
3 mm
P
PT1/8
PA
9.5 mm
PB
7.5 mm
T
Not listed for this size
Through-hole diameter
6.7 mm
Male rod AB
35 mm
Male rod D
16 mm
Male rod DA
32 mm
Male rod E
M14 × 1.5
Male rod EA
25 mm
Male rod EB
28 mm
Male rod F
19 mm
Male rod FA
8 mm
Male rod H
14 mm
Male rod M
28 mm
Male rod MA
3 mm
Stroke-dependent Drawing Relationships
Parameter
Details
A outline
A + stroke
AC outline
AC + stroke
Stroke used in the order code
20 mm
Construction and Materials
Parameter
Details
1 Rear cover
Aluminum alloy
2 Bumper
NBR
3 Piston
Aluminum alloy
4 Piston seal
NBR
5 Piston rod
Hard-chrome-plated S45C steel
6 Body
Aluminum alloy
7 Front cover
Aluminum alloy
8 O-ring
NBR
9 C-ring
Spring steel
10 Rod seal
NBR
11 Hex nut
Carbon steel
12 Bushing
Wear-resistant material
Item numbers identify the catalog sectional drawing. They are component references, not spare-part order codes or package quantities.
Matching Accessories and Mounting
Parameter
Details
Cylinder mounting
Use the mounting holes and dimensions shown for this body and action type. No unrelated compact-cylinder bracket is established as interchangeable by this chapter.
Magnetic switch condition
This code does not select a magnetic piston. A magnetic switch cannot provide piston-position sensing on a non-magnetic cylinder.
Accessory codes are listed for selection. Optional brackets, rod joints and switches are separate items unless the selected code or the stated pin note expressly identifies them. Component item numbers do not specify purchase quantities.
Stroke and Option Selection
Parameter
Details
Standard strokes for this bore/action
5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 100, 110, 120, 130 mm
Intermediate strokes
The catalog allows a nonstandard intermediate stroke with the outer dimensions of the next larger standard stroke; this does not extend the maximum allowable stroke.
Magnetic selection
Select the magnetic option before ordering a position switch; electrical type, cable and connector are selected separately.
Selection, Installation and Operation
Select bore from the required thrust and available pressure; then check stroke, load direction, mounting, cushioning and sensing. The general catalog load-factor references are at most 0.7 for static/slow work and at most 0.5 for 50–500 mm/s motion. They do not replace the load and guide checks for this cylinder.
Keep the piston rod and load aligned. Support lateral or eccentric loads with an appropriate guide; avoid applying bending force or tightening torque through the rod or guide.
Use clean filtered air. Prevent freezing, water, dust and corrosive substances from entering the cylinder. The cylinder is prelubricated; if lubrication is introduced, use additive-free ISO VG32 oil and continue that lubrication.
Start with the speed controller restricted, then open it gradually. Choose the circuit and flow-control direction for the action and load; a double-acting meter-out circuit is a general reference, not a guarantee of equal speed or precise stopping.
Isolate the air and electrical supplies and release trapped pressure before maintenance. Check the mounting and retained parts before repressurizing. A C-ring must be fully seated before operation.
Circuit Selection Reference at 500 mm/s
Parameter
Details
Reference bore
40 mm
Effective flow area at the reference speed
3.3 mm²
Tube outside / inside diameter
8 / 5 mm
Example speed controller
PTL01
Example silencer
BSL01
Example solenoid valves
5V11006 / 5V12006
Example air-piloted valves
4A11006 / 4A12006
The general 2022 selection table gives these circuit examples for this bore at a theoretical 500 mm/s reference speed. They are not included accessories, a guaranteed achieved speed, or a statement that every example screws directly into this cylinder. Match the actual port thread, action, tubing, valve capacity and operating conditions.
Optional air connections, tubing and controls
For the 8 mm OD tubing in the circuit reference in this description, select either a straight fitting or an A-type speed controller at each cylinder port. Match the separate valve ends as listed, keep the two chamber lines separate, and order options separately.
PC801: PT1/8 male × 8 mm tube ODStraight connection at the cylinder port; no speed adjustment; also connects the selected valve A/B work ports and, if the pneumatic scheme uses the same tube OD, the separate 4A pilot ports
PTL801A: PT1/8 male × 8 mm tube OD; A-typeCylinder-port meter-out speed control instead of the straight fitting
US98A080050100MBU: polyester polyurethane; 8 mm OD × 5 mm ID; blue, 100 m rollOptional straight tubing example; cut to the required installed length
UE95A080050100MBU: polyether polyurethane; 8 mm OD × 5 mm ID; blue, 100 m rollOptional straight tubing example; cut to the required installed length
5V11006A050, 5V11006A200, 5V12006A050, 5V12006A200: PT1/8 female main ports; PT1/8 female exhaust ports; terminal-cable version220 V AC solenoid direction control for extension and retraction
5V11006B050, 5V11006B200, 5V12006B050, 5V12006B200: PT1/8 female main ports; PT1/8 female exhaust ports; terminal-cable version24 V DC solenoid direction control for extension and retraction
5V11006C050, 5V11006C200, 5V12006C050, 5V12006C200: PT1/8 female main ports; PT1/8 female exhaust ports; terminal-cable version110 V AC solenoid direction control for extension and retraction
5V11006E050, 5V11006E200, 5V12006E050, 5V12006E200: PT1/8 female main ports; PT1/8 female exhaust ports; terminal-cable version24 V AC solenoid direction control for extension and retraction
5V11006F050, 5V11006F200, 5V12006F050, 5V12006F200: PT1/8 female main ports; PT1/8 female exhaust ports; terminal-cable version12 V DC solenoid direction control for extension and retraction
The A-type controller restricts flow from the cylinder port to the tube; reverse flow is free. Recommended cap-rotation torque is 0.08 N·m, not thread-tightening torque. Seal tapered PT connections correctly.
The listed gray fittings and controllers accept soft nylon or polyurethane tubing and are rated for 0–1 MPa and −20 to +70°C. Check tube insertion, wrench clearance and every connected part’s limits.
Choose the valve voltage and control action for your circuit. The 5V110 codes are single-solenoid spring-return valves; 5V120 codes are double-solenoid valves with memory. The final 050 or 200 selects a 0.5 m or 2 m terminal cable as part of the complete valve configuration. AC versions use 2.0 VA with +15%/−10% voltage tolerance; DC versions use 1.6 W with ±10% tolerance. These terminal-cable valves have dust protection; they are not DIN-plug versions.
The existing 4A11006 and 4A12006 pneumatic alternatives need one or two external pilot signals respectively through separate PT1/8 pilot ports. The listed pilot connection assumes 8 mm OD pilot tubing; match both ends of the pilot line and the actual control signal. Seal the tapered PT pilot threads with suitable thread sealant. Use only the chosen electrical or pneumatic control scheme.
With either listed valve family, the working circuit is limited to 0.15–0.8 MPa and −20 to +70°C, subject to any lower component limit. These choices do not guarantee a particular cylinder speed; verify flow, pressure loss and the load.
Use the existing BSL01 reference at the selected PT1/8 valve exhaust ports R/S. Keep exhaust paths open; do not fit silencers to the cylinder working ports. Silencer limits are 0–1 MPa and −20 to +70°C.
The blue 100 m tube codes are purchasable packaging examples, not the required installed tube length. US98A is polyester polyurethane (−20 to +70°C); UE95A is polyether polyurethane (−40 to +70°C). Both listed standard sizes are rated to 1 MPa at 23°C; apply temperature derating and the lowest limit of the whole circuit. Avoid solvents, corrosive media and prolonged direct sunlight.
Minimum bend radii for the listed US98A/UE95A tube are 20/17 mm. Check the actual route and tube length before ordering.Weight Reference
Catalog reference weight: 315 g. Calculated from the catalog base weight and stroke increment for this bore/configuration; it is a reference, not a measured weight.
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
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