The AirTAC AirTAC SDA40X70B 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 SDA40X70B 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 to drastically reduce axial mounting depth, making it highly effective for machinery where a standard round-body unit would protrude too far. The 16 mm piston rod features a male M14x1.5 thread, providing a robust mechanical coupling for your load.
This specific configuration operates without a piston magnet, meaning it cannot host magnetic sensing switches directly. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, which effectively absorbs impact but may require an external shock absorber if cycled at high speeds. The hard-anodized bore interior ensures smooth, low-friction operation across the 30-500 mm/s speed range.
| Model | AirTAC SDA40X70B 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).
Drives the mechanical arms that tuck inner flaps on automated corrugated box erecting lines, utilizing the 70 mm stroke to clear the packaging path quickly.
Actuates routing flaps on parcel handling conveyors, where the short body depth prevents interference with adjacent belt rollers during retraction.
Ejects small stamped metal components from a die set, using the male M14x1.5 rod end to thread directly into the ejection platen.
Selecting this 40 mm bore model provides a safe working load of roughly 377 N (about 60% of the 628.3 N push at 0.5 MPa), translating to a vertical lift capacity of approximately 32 kg with a 2:1 safety margin. If your application requires less force, stepping down to the SDA32 yields 402.1 N at 0.5 MPa, while heavier loads might necessitate the SDA50, which outputs 981.7 N at 0.5 MPa. When ordering, confirm the 40 mm bore, 70 mm stroke, PT1/8 port size, absence of a magnet, and the male M14x1.5 rod thread.
Because this is a standard double-acting cylinder, it will not hold a load if air pressure drops or the directional valve is centered; the piston will drift, and the fixed bumper only decelerates near the stroke end rather than locking the rod. If your setup demands strict position holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
At 0.5 MPa, this 40 mm bore cylinder provides 628.3 N of push force and 527.8 N of pull force. At 0.7 MPa, push increases to 879.6 N and pull to 738.9 N. The theoretical maximum push is 128 kgf at 1.0 MPa, which is the maximum operating pressure.
No, this specific SKU lacks the built-in piston magnet, so it cannot trigger AirTAC reed or electronic switches. You would need the SDA40X70BS variant for position sensing. Additionally, end stops rely on a fixed NBR bumper, not an adjustable cushion.
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