The AirTAC AirTAC SDA40X20SBH 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 SDA40X20SBH is a double-acting single-rod compact cylinder engineered with a 40 mm bore and 20 mm stroke. Its riveted assembly minimizes axial mounting depth, delivering a space-saving footprint where conventional round-body units fail to fit. Equipped with a fluororubber (FKM) seal, this variant provides heightened resistance to elevated thermal and oily conditions compared to standard NBR components.
This specific configuration yields 628.3 N of extend force at 0.5 MPa, supported by a 16 mm piston rod. The integrated -S piston magnet interfaces directly with AirTAC reed or electronic switches via the body grooves for precise position detection. Because this model includes the -B option, the rod end features a male M14x1.5 thread, offering a robust mechanical coupling for your tooling.
| Model | AirTAC SDA40X20SBH 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).
Secures aluminum housings during machining operations, utilizing the 628.3 N extend force to maintain rigid part placement against cutting forces.
Drives mechanical arms to tuck corrugated box flaps prior to sealing, where the short 20 mm stroke and FKM seals withstand dusty, high-cycle environments.
Pushes formed sheet metal components out of a die using the male M14x1.5 threaded rod end, benefiting from the 527.8 N retract force for reliable extraction.
When sizing this 40 mm bore unit, consider stepping down to the SDA32, which provides 402.1 N of push at 0.5 MPa, or moving up to the SDA50 for 981.7 N at the same pressure. The 628.3 N output at 0.5 MPa translates to a safe working load around 377 N, or a vertical lift capacity of roughly 32 kg with a 2:1 safety margin. To finalize your order, confirm the 40 mm bore, 20 mm stroke, PT1/8 port, built-in magnet (S), and male M14x1.5 rod thread (B).
Keep in mind that a standard compact cylinder cannot hold a load if air pressure drops or the valve is centered; the piston will drift. The fixed NBR bumper only decelerates the stroke near its end and does not function as a locking brake. If your application demands fail-safe load holding, you must incorporate an external rod lock or a pilot-operated check valve.
Quick checklist
This 40 mm bore double-acting cylinder generates 628.3 N push and 527.8 N pull at 0.5 MPa. At 0.7 MPa, it yields 879.6 N push and 738.9 N pull. The theoretical maximum push is 128 kgf at 1.0 MPa, with an operating pressure range of 0.15-1.0 MPa and a proof pressure of 1.5 MPa.
It relies on a fixed NBR bumper at each end to decelerate the piston, which is not an adjustable air cushion; for high-energy cycles, add an external shock absorber. Position detection is enabled by the built-in magnet, which works with AirTAC reed or electronic switches fitted into the body grooves.
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