The AirTAC AirTAC SDA25X85 Compact Cylinder | 25mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø25mm bore and 85mm 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 SDA25X85 is a double-acting single-rod compact cylinder engineered to deliver 245.4 N of push force and 206.2 N of pull force at 0.5 MPa. Its riveted assembly securely joins the barrel, rear cover, piston, and rod, resulting in a very short axial footprint that fits where round-body units cannot. This space efficiency makes it highly effective for machinery with tight mounting envelopes.
This specific configuration features an 85 mm stroke, a 10 mm piston rod, and an M5x0.8 air port. The bore inner wall is hard-anodized for durability, and the piston relies on a two-way seal. Deceleration at the stroke ends is handled by a fixed NBR bumper, which absorbs impact energy but is not a field-adjustable air cushion. Because this SKU lacks the S option, it has no internal piston magnet and cannot be used with magnetic switches.
| Model | AirTAC SDA25X85 Compact Cylinder | 25mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø25 mm |
| Stroke | 85 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. |
| ×85 | 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).
Cycles a tool carousel in a CNC router to swap 3.175 mm shank bits, utilizing the 85 mm stroke to clear the spindle during changes.
Folds the minor flaps of corrugated shipping boxes prior to tape sealing, fitting within the narrow side frame of the case erector.
Pushes lightweight parcels from a main transport belt onto a packing spur line, providing adequate push force without excessive bulk.
When sizing this unit, evaluate your force requirements carefully. If you need less push, stepping down to the SDA20 provides 157.1 N at 0.5 MPa. If your application demands more power, stepping up to the SDA32 yields 402.1 N at 0.5 MPa. Based on the 245.4 N push figure, the safe working load is roughly 147 N (about 60 percent capacity), translating to a vertical lift capability of approximately 12.5 kg with a 2:1 safety margin.
Keep in mind that a standard double-acting cylinder does not hold its position if air pressure drops or the valve is centered; the piston will drift, and the fixed bumper only decelerates it near the end of travel rather than locking it. To maintain a load without live pressure, you must integrate an external rod lock or a pilot-operated check valve. To order, confirm the 25 mm bore, 85 mm stroke, M5x0.8 port, female rod thread, and no magnet.
Quick checklist
This double-acting cylinder provides 245.4 N push and 206.2 N pull at 0.5 MPa, or 343.6 N push and 288.6 N pull at 0.7 MPa. The theoretical maximum push force is 50 kgf at 1.0 MPa. It operates on filtered air between 0.15 and 1.0 MPa, with a speed range of 30-500 mm/s and an ambient temperature of -20 to +70 C.
No, this specific SKU does not include the S option, meaning it lacks a piston magnet and cannot trigger AirTAC reed or electronic switches. Additionally, end-of-stroke deceleration relies on a fixed NBR bumper rather than an adjustable air cushion, so external shock absorbers may be needed for high-speed operations.
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