The AirTAC AirTAC SDA40X55BH 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 SDA40X55BH 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. This specific SKU features a male M14x1.5 piston rod thread for robust mechanical coupling, alongside an FKM fluororubber seal option that enhances resistance to higher temperatures and oily environments. Its short riveted body design significantly reduces axial mounting depth compared to round-body units, saving valuable machine footprint.
The bore inner wall is hard-anodized for longevity, and end-stop deceleration is handled strictly by a fixed NBR bumper at each end. Because this configuration lacks the -S magnet code, it cannot host AirTAC reed or electronic switches. Operating at speeds of 30-500 mm/s, the unit provides a safe working load of roughly 377 N (about 60% of the 0.5 MPa push figure) and can vertically lift approximately 32 kg with a 2:1 safety margin.
| Model | AirTAC SDA40X55BH 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 CNC machining, utilizing the 628.3 N extend force and FKM seals to withstand cutting fluid exposure.
Drives the mechanical arms that tuck corrugated box flaps prior to sealing, where the 55 mm stroke and space-saving riveted body fit neatly within narrow conveyor frames.
Actuates routing gates on a logistics sorting line, using the male M14x1.5 rod end to push heavy wooden pallets onto secondary chutes reliably.
When sizing this actuator, stepping down to the SDA32 yields 402.1 N of push at 0.5 MPa, while stepping up to the SDA50 provides 981.7 N at the same pressure. To confirm your ordering essentials for this model: the bore is 40 mm, the stroke is 55 mm, and the air port is PT1/8. This SKU specifies the male M14x1.5 rod end (-B) and the FKM seal (-H), but it omits the magnet, so position sensing is not supported.
Keep in mind that a standard compact cylinder does not hold its position or load if air pressure drops or the valve is centered. The piston will drift, and the fixed NBR bumper only decelerates the stroke near the end of travel without acting as a lock or brake. If your application requires a held load without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
At 0.5 MPa, this 40 mm bore cylinder provides 628.3 N of push force and 527.8 N of pull force. At 0.7 MPa, push increases to 879.6 N. The theoretical maximum push is 128 kgf at 1.0 MPa, which is the maximum operating pressure.
This model uses a fixed NBR bumper at each end to decelerate the stroke, not an adjustable air cushion. For high-speed applications, you should slow the approach or add an external shock absorber. Additionally, because this SKU lacks the -S magnet code, it cannot accept reed or electronic switches.
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