The AirTAC AirTAC SDA40X140BH Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 140mm 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 SDA40X140BH is a double-acting single-rod compact cylinder engineered for tight axial mounting spaces. It generates 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. This specific SKU includes a male M14x1.5 piston rod thread for robust mechanical coupling and utilizes fluororubber (FKM) seals for enhanced thermal and oil resistance. Because the 140 mm stroke exceeds the 130 mm standard maximum for this 40 mm bore, it is produced as a non-standard, made-to-order unit.
The riveted body design integrates the barrel and covers to minimize overall length, a crucial advantage when machine footprint is restricted. Instead of an adjustable air cushion, deceleration at the stroke ends relies on a fixed NBR bumper. Note that this configuration omits the piston magnet, meaning it cannot support AirTAC reed or electronic switches; position sensing requires the -S variant. Operating speed ranges from 30-500 mm/s.
| Model | AirTAC SDA40X140BH Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 140 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. |
| ×140 | 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).
Ejecting finished aluminum parts from a machining center fixture, where the male M14x1.5 rod end securely threads into a custom ejector plate and the FKM seals resist way-oil contamination.
Separating empty pallets in a high-speed packaging line; the 140 mm stroke clears the stack while the short riveted body saves valuable floor space in the depalletizer frame.
Raising a 30 kg access gate on a textile loom, operating well within the 32 kg safe vertical lift limit, though an external pilot-operated check valve must be fitted to prevent gravity drift.
When sizing this actuator, evaluate your force requirements carefully. 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. For the 628.3 N available here, the safe working load is approximately 377 N (about 60% capacity), translating to a vertical lift capability of roughly 32 kg with a 2:1 safety margin. Keep in mind that a standard compact cylinder will drift and cannot hold a load if air pressure is lost or the valve is centered; maintaining vertical position requires an external rod lock or pilot-operated check valve. To order, confirm the 40 mm bore, 140 mm non-standard stroke, PT1/8 port, male M14x1.5 rod thread, and FKM seal option.
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 the maximum operating pressure of 1.0 MPa.
No, this specific SKU does not include a piston magnet, so it cannot support AirTAC reed or electronic switches. You would need to specify the -S option to enable position sensing. Additionally, end-stop deceleration is handled by a fixed NBR bumper, not an adjustable cushion, so external shock absorbers may be needed for high-energy loads.
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