The AirTAC AirTAC SDA40X55SH 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 SDA40X55SH is a double-acting, single-rod compact cylinder engineered with a 40 mm bore and 55 mm stroke. It generates 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. The riveted unibody construction merges the barrel and covers to drastically reduce axial mounting depth, offering a distinct footprint advantage in tight machine cells. This specific configuration includes an FKM fluororubber seal for heightened thermal and oil resistance.
Equipped with a built-in piston magnet (-S), the body features integrated grooves for direct mounting of AirTAC reed or electronic switches. The -B option provides a male M14x1.5 thread on the 16 mm rod for secure load coupling. End-stopping relies on a fixed NBR bumper that decelerates the piston near stroke limits rather than an adjustable air cushion. Operating speed ranges from 30-500 mm/s.
| Model | AirTAC SDA40X55SH 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 engine blocks during machining operations, utilizing the 628.3 N extend force and FKM seals to withstand cutting fluid exposure.
Actuates forming dies on PET bottle lines where the shortened body depth prevents interference with moving conveyor platens.
Applies precise downward pressure on multilayer PCB stacks, relying on the 16 mm rod and male M14x1.5 thread for rigid tool plate attachment.
When sizing this 40 mm bore, compare its 628.3 N push at 0.5 MPa against adjacent options. Stepping down, the SDA32 yields 402.1 N; stepping up, the SDA50 provides 981.7 N. For this model, a safe working load is roughly 377 N (about 60 percent of the 0.5 MPa push figure), translating to a vertical lift capacity of approximately 32 kg with a 2:1 safety margin. To finalize your order, confirm the 55 mm stroke, PT1/8 port, male M14x1.5 rod thread, the -S magnet, and the -H FKM seal. Note that a standard cylinder drifts if air pressure drops, so apply an external rod lock or pilot-operated check valve if the mechanism must hold a load without live pressure.
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 spans 0.15-1.0 MPa, with a proof pressure of 1.5 MPa.
It uses 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. Additionally, the piston will drift on air loss, so an external rod lock or pilot-operated check valve is required to hold a load safely.
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