The AirTAC AirTAC SDA25X40SBH Compact Cylinder | 25mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø25mm bore and 40mm stroke, M5×0.8 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
The AirTAC SDA25X40SBH is a double-acting, single-rod compact cylinder engineered with a 25 mm bore and 40 mm stroke. It delivers a push force of 245.4 N and a pull force of 206.2 N at 0.5 MPa. The riveted unibody design merges the barrel, rear cover, piston, and rod to minimize axial mounting depth, saving valuable machine footprint where a standard round-body unit cannot fit. This specific configuration includes a male M8x1.25 piston rod end, a built-in magnet for position sensing, and fluororubber (FKM) seals for enhanced thermal and oil resistance.
Instead of an adjustable air cushion, the piston strikes a fixed NBR bumper at each end to decelerate the stroke. Because this bumper is not a locking mechanism, the piston will drift if air pressure is lost or the valve is centered; applications requiring suspended load holding must integrate an external rod lock or pilot-operated check valve. The hard-anodized bore wall reduces friction, and the integrated magnet supports AirTAC reed or electronic switches via the body grooves.
| Model | AirTAC SDA25X40SBH Compact Cylinder | 25mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod end thread | M5×0.8 female / M8×1.25 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 | 245 N | 206 N |
| 0.7 MPa | 344 N | — |
| Max (@1.0 MPa) | 50 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. |
|---|---|
| 25 | 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 workpieces in a CNC milling vise using the male M8x1.25 rod end, providing 245.4 N of clamping force without deforming the part.
Actuates a heated sealing head to close pharmaceutical blister packs, where the FKM seals withstand continuous ambient heat exposure.
Pushes small cardboard cartons on a packaging line at up to 500 mm/s, using the integrated magnet to confirm the 40 mm stroke via a reed or electronic switch.
When sizing this 25 mm bore unit, evaluate your force requirements both ways: stepping down to the SDA20 yields 157.1 N of push force at 0.5 MPa, while stepping up to the SDA32 provides 402.1 N. At 245.4 N, this SDA25 offers a safe working load of roughly 147 N (about 60% of the 0.5 MPa figure) and can vertically lift approximately 12.5 kg with a 2:1 safety margin. Operating speeds span 30-500 mm/s.
Confirm your ordering essentials before checkout: 25 mm bore, 40 mm stroke, M5x0.8 air port, male M8x1.25 rod thread (B), magnetic piston (S), and FKM seals (H). For high cycling speeds that generate significant kinetic energy, the fixed NBR bumper alone may be insufficient, so adding an external shock absorber or slowing the approach speed is advised.
Quick checklist
This 25 mm bore double-acting cylinder generates a push force of 245.4 N and a pull force of 206.2 N at 0.5 MPa. At 0.7 MPa, push increases to 343.6 N. The theoretical maximum push is 50 kgf at 1.0 MPa. Operating pressure ranges from 0.15-1.0 MPa, with a proof pressure of 1.5 MPa, and the operating temperature is -20 to +70 C.
It relies on a fixed NBR bumper at each end to decelerate the piston, which is not an adjustable air cushion. For high-energy cycles, an external shock absorber is recommended. Additionally, it does not hold position naturally; if air is lost, the piston drifts, so an external rod lock or pilot-operated check valve is required to suspend a load safely.
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