The AirTAC AirTAC SDA40X25H Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 25mm 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 SDA40X25H is a double-acting, single-rod compact cylinder engineered for tight axial spaces. It generates 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. This specific SKU features an FKM (fluororubber) seal variant, providing enhanced resistance to higher temperatures and oily environments compared to the standard NBR seals.
A short riveted assembly joins the barrel, rear cover, piston, and rod, drastically reducing mounting depth versus round-body units. End-stop energy is managed strictly by fixed NBR bumpers, not adjustable air cushions. Because this configuration lacks the -S magnet code, it cannot host AirTAC reed or electronic switches. The 16 mm piston rod utilizes a female M8x1.25 thread, and air connections use a PT1/8 port.
| Model | AirTAC SDA40X25H Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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. |
| ×25 | 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 housings inside machining centers, where the FKM seals survive elevated ambient heat and the compact body fits within tight tooling envelopes.
Drives a heated applicator head down onto carton flaps, utilizing the 628.3 N extend force while resisting oil contamination from nearby lubricators.
Actuates a routing flap on a 32 kg parcel line, operating at 30-500 mm/s to push items into packing chutes without extending into the walkway.
When sizing this 40 mm bore, consider stepping down to the SDA32, which yields 402.1 N of push at 0.5 MPa, or moving up to the SDA50, which provides 981.7 N. For the SDA40X25H, a safe working load is approximately 377 N (about 60% of the 0.5 MPa figure), translating to a vertical lift capacity of roughly 32 kg with a 2:1 safety margin. To finalize your order, confirm the 40 mm bore, 25 mm stroke, PT1/8 port, female rod thread, and the FKM seal option. Note that a standard cylinder drifts when air pressure is lost or the valve is centered; the fixed bumper only decelerates the stroke end and does not function as a locking brake. For suspended loads, specify an external rod lock or a pilot-operated check valve.
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. Operating pressure ranges from 0.15-1.0 MPa, with a proof pressure of 1.5 MPa, and the speed range is 30-500 mm/s.
No, this specific SKU lacks the -S option, meaning it has no piston magnet and cannot trigger AirTAC reed or electronic switches. You would need to specify the SDA40X25S-H variant to enable sensing. Additionally, end-stop deceleration relies on a fixed NBR bumper rather than an adjustable air cushion.
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