The AirTAC AirTAC SDA40X70BH Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 70mm 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 SDA40X70BH is a double-acting single-rod compact cylinder engineered with a 40 mm bore and 70 mm stroke. It generates 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 secure mechanical coupling, alongside an FKM fluororubber seal variant that elevates resistance to higher ambient heat and oil exposure compared to standard NBR. The hard-anodized bore and two-way piston seal ensure consistent friction-free travel.
Built on a short riveted body, this unit drastically reduces axial mounting depth where a standard round-body unit would be too bulky. End-stopping relies on a fixed NBR bumper rather than an adjustable air cushion, meaning operators must control approach velocity or mount an external shock absorber for high-energy cycles. Because this configuration lacks the -S magnet code, it cannot host reed or electronic switches.
| Model | AirTAC SDA40X70BH Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 70 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. |
| ×70 | 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 heavy cast iron engine blocks during machining with its 628.3 N extend force, while the male M14x1.5 rod threads directly into custom tooling jaws.
Handles repetitive carton flap folding near heat zones safely, leveraging the FKM fluororubber seals to maintain integrity against thermal degradation.
Pushes 30 kg timber pallets sideways off a high-speed line; the compact riveted body fits within the 80 mm frame profile without protruding into the walkway.
When sizing this 40 mm bore, evaluate your neighbors: the SDA32 yields 402.1 N push at 0.5 MPa for lighter duties, while the SDA50 steps up to 981.7 N for heavier demands. Based on the 628.3 N push figure 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 a standard double-acting cylinder drifts when air pressure drops or the valve centers—the fixed bumper only decelerates near stroke end and acts as no lock. For suspended loads, integrate an external rod lock or pilot-operated check valve. To order, confirm the 40 mm bore, 70 mm stroke, PT1/8 port, male M14x1.5 rod thread, and FKM seals.
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, which is the maximum operating pressure.
No, this specific SKU lacks the -S piston magnet, so it cannot host reed or electronic switches. You would need the -S variant for sensing. Additionally, end stopping uses a fixed NBR bumper, not an adjustable air cushion, so external shock absorption is advised for fast cycles.
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