The AirTAC AirTAC SDA40X85B Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 85mm 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 SDA40X85B 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. Its riveted assembly merges the barrel, rear cover, piston, and rod into a highly shortened unit, drastically reducing axial mounting depth compared to conventional round-body designs. This space efficiency makes it ideal for machinery where footprint constraints are critical.
This specific configuration includes a male M14x1.5 piston rod thread (denoted by the B option) for robust mechanical coupling to your load, alongside a 16 mm rod diameter and PT1/8 air ports. The bore is hard-anodized for longevity, while a fixed NBR bumper at each end absorbs end-stop impact. Note that this SKU lacks a piston magnet, so position sensing is not supported without the S variant.
| Model | AirTAC SDA40X85B Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 85 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. |
| ×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).
Pushes cartons onto secondary packaging lines using the 628.3 N extend force, while the 85 mm stroke clears the lane efficiently.
Transfers cutting tools into spindles using the male M14x1.5 rod end, fitting neatly into tight machine envelopes.
Separates empty pallets in automated handling systems, utilizing the compact riveted body to minimize frame intrusion.
When sizing this actuator, evaluate your force margins carefully. Stepping down, the SDA32 bore provides 402.1 N of push at 0.5 MPa, whereas stepping up to the SDA50 yields 981.7 N. The 40 mm bore here offers a calculated safe working load of roughly 377 N (about 60% of the 0.5 MPa figure), translating to a vertical lift capacity of approximately 32 kg with a 2:1 safety margin. Ensure your ordering essentials match this exact SKU: 40 mm bore, 85 mm stroke, PT1/8 port, male M14x1.5 rod thread, and no sensor magnet.
Keep in mind that a standard compact cylinder cannot hold a load if air pressure drops or the valve is centered; the piston will drift, and the fixed NBR bumper only decelerates the stroke near its end rather than locking the rod. If your application demands position holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve. Furthermore, for high-speed cycles approaching the 30-500 mm/s range, consider adding an external shock absorber since the fixed bumper is not an adjustable air cushion.
Quick checklist
This double-acting cylinder provides 628.3 N push and 527.8 N pull at 0.5 MPa, and 879.6 N push at 0.7 MPa. The theoretical maximum push force is 128 kgf at 1.0 MPa. It operates between 0.15-1.0 MPa, with a proof pressure of 1.5 MPa, and supports speeds of 30-500 mm/s.
No. This SKU uses a fixed NBR bumper at each end to decelerate the stroke, which is not a field-adjustable air cushion. Additionally, it lacks a piston magnet, so it cannot support reed or electronic switches; you would need the S option for sensing capabilities.
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