The AirTAC AirTAC SDA40X70S 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 SDA40X70S is a double-acting single-rod compact cylinder engineered to deliver a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa. Its riveted assembly merges the barrel, rear cover, piston, and rod into a highly shortened axial footprint, conserving machine space where conventional round bodies cannot fit. The 40 mm bore features a hard-anodized inner wall and operates at speeds between 30 and 500 mm/s.
This specific configuration includes a built-in piston magnet (the S option) for non-contact position detection using AirTAC reed or electronic switches housed in the body grooves. The 16 mm piston rod terminates in a female M8x1.25 thread, and end-stop deceleration relies strictly on fixed NBR bumpers rather than adjustable air cushions.
| Model | AirTAC SDA40X70S 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).
Routes plastic containers on a packaging conveyor using the 70 mm stroke, absorbing end impacts with the fixed NBR bumper at cycling speeds up to 500 mm/s.
Secures circuit board panels during routing operations, where the 628.3 N extend force at 0.5 MPa provides rigid holding without crushing the substrate.
Folds minor corrugated box flaps prior to tape sealing, utilizing the integrated magnet to confirm fold completion via a reed or electronic switch.
When sizing this actuator, evaluate your neighbours: stepping down to the SDA32 yields 402.1 N of push force at 0.5 MPa, while moving up to the SDA50 provides 981.7 N. For the SDA40X70S, a safe working load is approximately 377 N (around 60% of the 0.5 MPa output), translating to a vertical lift capacity of roughly 32 kg with a 2:1 safety margin. To order, confirm the 40 mm bore, 70 mm stroke, PT1/8 port, female rod thread, and the required magnetic switch. If the application must maintain a vertical load without live pressure, note that this unit drifts on air loss; an external rod lock or pilot-operated check valve is required for secure holding.
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 to 1.0 MPa.
No, it uses fixed NBR bumpers at both stroke ends to decelerate the piston. It is not an adjustable air cushion and does not act as a lock or brake. For high-energy cycles, add an external shock absorber or slow the approach speed.
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