The AirTAC AirTAC SDA40X70 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 SDA40X70 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 significantly reduces axial mounting depth compared to conventional round-body units, making it highly effective for machinery where space is strictly limited. The hard-anodized bore ensures smooth low-friction operation across the 30-500 mm/s speed range.
This specific configuration features a 16 mm piston rod and PT1/8 air ports. End-stopping relies on a fixed NBR bumper rather than an adjustable air cushion, meaning high-energy cycles may require an external shock absorber to prevent wear. Because this SKU lacks the -S magnet option, it cannot host reed or electronic switches for position sensing.
| Model | AirTAC SDA40X70 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).
Secures aluminium engine blocks during machining operations, utilizing the 628.3 N extend force to grip parts firmly against the spindle vibrations.
Drives the mechanical arms that tuck corrugated box flaps prior to tape sealing on high-speed packaging lines where axial depth is minimal.
Actuates routing paddles to push selected parcels off a main transport belt, relying on the 70 mm stroke to clear the lane efficiently.
When sizing this unit, 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 at the same pressure. Based on the 628.3 N output, your safe working load is roughly 377 N (60% capacity), translating to a vertical lift capability of about 32 kg with a 2:1 safety margin. Confirm your ordering essentials: 40 mm bore, 70 mm stroke, female M8x1.25 rod thread, and no sensor magnet.
Remember that a standard compact actuator will not hold a load if air pressure drops or the directional valve centres. The piston will drift, and the fixed NBR bumper only decelerates the stroke near its end without acting as a mechanical lock. If your application demands strict position holding on air loss, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
This double-acting cylinder generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 879.6 N push and 738.9 N pull 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 functions in temperatures from -20 to +70 C.
No, this SKU uses a fixed NBR bumper at each end to decelerate the stroke, not a field-adjustable air cushion, so you may need an external shock absorber for high-speed loads. Additionally, this specific unit lacks the -S piston magnet, meaning it cannot support reed or electronic switches for position detection.
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