The AirTAC AirTAC SDA40X40BH Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 40mm 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 SDA40X40BH 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. The short riveted body significantly reduces axial mounting depth compared to round-body alternatives, making it highly effective for machinery where space footprint is restricted. This specific configuration includes a male M14x1.5 piston rod end for direct load coupling and utilizes fluororubber (FKM) seals for enhanced thermal and oil resistance.
The 40 mm bore features a hard-anodized inner wall and a fixed NBR bumper at each end to absorb end-stop impact. Because this bumper is not an adjustable air cushion, operators should reduce approach speed or utilize an external shock absorber for high-energy cycles. This SKU omits the piston magnet, so position sensing is not supported without upgrading to the -S variant. The unit operates at 30-500 mm/s and uses PT1/8 ports.
| Model | AirTAC SDA40X40BH Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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. |
| ×40 | 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 to hold components firmly against locator pins without requiring excessive axial envelope space.
Drives mechanical arms to tuck corrugated box flaps prior to tape sealing, where the 40 mm stroke and male M14x1.5 thread provide a robust connection to the folding linkage.
Ejects misaligned parcels from a sorting line; the FKM seals withstand occasional lubricant overspray from adjacent drive chains while handling the 377 N safe working load.
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. Based on the 628.3 N output at 0.5 MPa, a safe working load is roughly 377 N (about 60 percent capacity), translating to a vertical lift capability of approximately 32 kg with a 2:1 safety margin. Keep in mind that a standard compact cylinder drifts when air pressure is lost or the valve is centered; the fixed bumper only decelerates the stroke near the end and does not function as a locking brake. To suspend a load safely, integrate an external rod lock or a pilot-operated check valve. To order, confirm the 40 mm bore, 40 mm stroke, PT1/8 port, male M14x1.5 rod thread, FKM seals, and no magnet.
Quick checklist
This 40 mm bore 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. Operating pressure ranges from 0.15 to 1.0 MPa, with a proof pressure of 1.5 MPa, and the speed range spans 30-500 mm/s.
No, this specific SKU does not include a piston magnet, so it cannot trigger AirTAC reed or electronic switches. You would need to select the -S option to enable sensing. Additionally, it uses a fixed NBR bumper rather than an adjustable air cushion, so external shock absorption is recommended for high-speed loads.
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