The AirTAC AirTAC SDA40X55SB 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 SDA40X55SB is a double-acting single-rod compact cylinder engineered for tight axial spaces. A riveted assembly unites the barrel, rear cover, piston, and rod, drastically reducing mounting depth compared to round-body units. Delivering 628.3 N of push force at 0.5 MPa, it handles substantial workloads within a minimal footprint.
This configuration includes a built-in piston magnet (-S) for AirTAC reed or electronic switches, and a male M14x1.5 threaded rod end (-B) for secure load coupling. The 16 mm piston rod operates inside a hard-anodized bore, while fixed NBR bumpers manage end-stop deceleration. Operating speed ranges from 30-500 mm/s.
| Model | AirTAC SDA40X55SB 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).
Secures aluminum housings during machining. The male M14x1.5 rod end provides a rigid thread interface for custom clamp arms, while the compact body fits within tight multi-pallet tombstone grids.
Drives mechanical folders on high-speed case erectors. The 55 mm stroke actuates rapidly across the 30-500 mm/s range, and the fixed NBR bumper absorbs the kinetic energy at each stroke conclusion.
Pushes molded plastic parts out of press dies. The 628.3 N extension force at 0.5 MPa easily overcomes ejection resistance, and the integrated magnet enables position confirmation via reed or electronic switches.
When sizing this actuator, evaluate your force margins carefully. Stepping down to the SDA32 yields 402.1 N of push at 0.5 MPa, whereas moving up to the SDA50 provides 981.7 N. With this 40 mm bore generating 628.3 N at 0.5 MPa, the safe working load is approximately 377 N (around 60 percent of capacity), translating to a vertical lift capability of roughly 32 kg with a 2:1 safety margin. Note that a plain compact cylinder drifts when air pressure is lost or the valve is centered; the fixed bumper only decelerates the stroke end and cannot lock the load. For suspended loads, specify an external rod lock or pilot-operated check valve. To order, confirm the 40 mm bore, 55 mm stroke, PT1/8 port, -S magnet, and -B male 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, with a proof pressure of 1.5 MPa, and functions in temperatures from -20 to +70 C.
No, it uses fixed NBR bumpers at both ends to decelerate the piston near stroke completion; these are not field-adjustable air cushions, so external shock absorbers are recommended for high-energy loads. Additionally, the -B code indicates a male M14x1.5 threaded piston rod rather than the default female M8x1.25 thread.
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