The AirTAC AirTAC SDA40X55B 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 SDA40X55B 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 significantly reduces axial mounting depth compared to conventional round-body units, making it highly effective for machinery where footprint reduction is critical. The unit operates at speeds between 30 and 500 mm/s.
This specific SKU includes a male M14x1.5 piston rod thread for robust mechanical coupling to your load. The bore is hard-anodized for longevity, and the end stops rely on a fixed NBR bumper rather than an adjustable air cushion. Note that this configuration lacks a piston magnet, so it cannot directly host AirTAC reed or electronic switches without selecting the -S option.
| Model | AirTAC SDA40X55B 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).
Provides the 628.3 N push stroke required to positively fold heavy cardboard flaps on high-speed packaging lines without consuming excessive frame depth.
Actuates routing gates on conveyor networks; the male M14x1.5 rod end secures the diverter arm firmly against continuous lateral flow.
Locks aluminum castings into machining fixtures, offering sufficient holding power while the compact riveted body avoids interfering with the cutting envelope.
When sizing this 40 mm bore actuator, consider stepping down to the SDA32 which provides 402.1 N of push at 0.5 MPa, or moving up to the SDA50 which yields 981.7 N at the same pressure. Based on the 628.3 N output, a safe working load is approximately 377 N (60% capacity), translating to a vertical lift capability of about 32 kg with a 2:1 safety margin. To finalize your order, confirm the 40 mm bore, 55 mm stroke, PT1/8 port, male M14x1.5 rod thread, and no magnet. Keep in mind this cylinder will not hold a load if air pressure drops; the piston will drift and the fixed bumper only decelerates near the stroke end. Use an external rod lock or pilot-operated check valve if position holding is required.
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, the push force is 879.6 N and the pull force is 738.9 N. The theoretical maximum push force is 128 kgf at 1.0 MPa.
No adjustable air cushion is available; it uses a fixed NBR bumper at each end to decelerate the stroke, so you should add an external shock absorber for high-energy loads. Additionally, this specific SKU lacks the -S magnet, meaning it cannot support reed or electronic switches.
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