The AirTAC AirTAC SDA40X55S Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 55mm 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 SDA40X55S 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 riveted assembly merges the barrel, rear cover, piston, and rod to drastically reduce axial mounting depth, saving valuable machine footprint where a conventional round-body unit would be too long. The 40 mm bore features a hard-anodized inner wall and operates on filtered air at 30-500 mm/s.
Because this configuration includes the S option, a built-in piston magnet enables position detection via an AirTAC reed or electronic switch seated in the body grooves. End-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning high-energy cycles may require an external shock absorber to prevent impact damage. The 16 mm rod terminates in a female M8x1.25 thread, and the unit accepts standard AirTAC compact-cylinder accessories.
| Model | AirTAC SDA40X55S Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 55 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. |
| ×55 | 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).
Drives the folding mechanism on packaging lines to close corrugated box flaps prior to sealing, utilizing the 628.3 N extend force within a tight machine frame.
Pivots sorting lane gates on logistics conveyors, where the 55 mm stroke provides rapid redirection of parcels without excessive axial protrusion.
Advances raw material stock into the collet chuck, benefiting from the hard-anodized bore and consistent 527.8 N retract force to clear the spindle tube.
Selecting this 40 mm bore model provides a safe working load of roughly 377 N (about 60% of the 628.3 N push at 0.5 MPa), translating to a vertical lift capacity of approximately 32 kg with a 2:1 safety margin. If your application requires less force, stepping down to the SDA32 yields 402.1 N at 0.5 MPa, while heavier loads necessitate the SDA50 at 981.7 N. Keep in mind that a plain compact cylinder drifts when air pressure is lost or the valve is centered, as the fixed bumper only decelerates the stroke end without acting as a lock or brake; holding a suspended load requires an external rod lock or pilot-operated check valve. When ordering, confirm the 40 mm bore, 55 mm stroke, PT1/8 port, built-in S magnet, and female M8x1.25 rod thread.
Quick checklist
This double-acting cylinder generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum push force is 128 kgf at 1.0 MPa. It operates between 0.15-1.0 MPa, withstands 1.5 MPa proof pressure, and functions in temperatures from -20 to +70 C.
Yes, the S option provides a piston magnet compatible with AirTAC reed or electronic switches mounted in the body grooves. Impact absorption relies on a fixed NBR bumper at each end, which decelerates the piston but is not an adjustable air cushion; for high-speed or high-energy cycles, you should add an external shock absorber or slow the approach speed.
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