The AirTAC AirTAC SDA40X20B Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 20mm stroke, PT1/8 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
The AirTAC SDA40X20B is a double-acting single-rod compact cylinder engineered to deliver 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. Its short riveted body significantly reduces axial mounting depth, making it ideal for machinery where a traditional round-body unit would occupy too much space. This specific SKU includes a male M14x1.5 piston rod thread for robust mechanical coupling to your load.
The bore features a hard-anodized inner wall and a two-way piston seal operating at speeds from 30-500 mm/s. Instead of an adjustable air cushion, the piston strikes a fixed NBR bumper at each end to decelerate the stroke. Note that this configuration omits the piston magnet, so it cannot host AirTAC reed or electronic switches.
| Model | AirTAC SDA40X20B Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Double acting |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 male (B) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Fixed NBR bumper (both ends) |
| Max standard stroke | Up to 120 mm |
Specifications follow the official AirTAC SDA compact-cylinder datasheet. Confirm against the product label before installation. Port thread: PT (standard). Rod: female thread (blank) / male thread (B).
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SDA | Compact (thin) double-acting cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| B | Male-thread piston rod (omit = female-thread rod). |
Thread: PT standard. Related SDA-family variants: SSA (single-acting push), STA (single-acting pull), SDAD (double rod), SDAJ (adjustable stroke), SDAT (duplex), SDAW (duplex-end).
Provides precise lateral pressure on conveyor lines, utilizing the short 20 mm stroke and 628.3 N force to align circuit boards without overwhelming delicate components.
Drives compact mechanical arms to tuck packaging flaps on high-speed lines, where the reduced axial length prevents interference with neighboring tooling.
Pushes dowel pins into aluminum extrusions using the male M14x1.5 threaded rod end to secure custom pressing fixtures under 527.8 N of retract pull force.
When sizing this unit, evaluate your force requirements carefully. Stepping down to the SDA32 yields 402.1 N of push at 0.5 MPa, while stepping up to the SDA50 provides 981.7 N. For the SDA40X20B, the theoretical safe working load is approximately 377 N (60% of the 0.5 MPa figure), translating to a vertical lift capacity of about 32 kg with a 2:1 safety margin. Keep in mind that a standard double-acting cylinder drifts if air pressure is lost or the valve is centered; the fixed bumper only decelerates near stroke end and acts as neither a lock nor a brake. For suspended loads, integrate an external rod lock or pilot-operated check valve. Confirm your ordering essentials: 40 mm bore, 20 mm stroke, PT1/8 port, male M14x1.5 rod thread, and no sensor magnet.
Quick checklist
At 0.5 MPa, the push force is 628.3 N and the pull force is 527.8 N. At 0.7 MPa, push is 879.6 N and pull is 738.9 N. The theoretical maximum push is 128 kgf at 1.0 MPa. Operating pressure ranges from 0.15-1.0 MPa, with a proof pressure of 1.5 MPa, and the speed range is 30-500 mm/s.
No, this specific SKU lacks the internal piston magnet, so it cannot trigger reed or electronic switches. You would need the SDA40X20BS variant for position sensing. Additionally, end-of-stroke deceleration relies on a fixed NBR bumper rather than an adjustable air cushion.
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