The AirTAC AirTAC SDA40X70H 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 SDA40X70H is a double-acting single-rod compact cylinder engineered with a 40 mm bore and 70 mm stroke. It generates 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. This unit features an FKM (fluororubber) seal variant, providing enhanced resistance to higher temperatures and oil exposure compared to standard NBR seals. The hard-anodized bore and two-way piston seal ensure durable, leak-free operation.
Its short riveted body significantly reduces axial mounting depth, making it ideal for machinery where a traditional round-body cylinder would not fit. End-of-stroke deceleration is handled by a fixed NBR bumper at each end, which is not an adjustable air cushion. Because this specific SKU lacks the -S magnet option, it cannot directly host AirTAC reed or electronic switches.
| Model | AirTAC SDA40X70H 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).
Actuates diverter gates on PET bottle conveying lines, using the 70 mm stroke to shift containers between labeling and filling lanes with precise timing.
Provides intermediate clamping force for secondary machining fixtures, where the 628.3 N push securely holds aluminum workpieces against a locator stop.
Toggles metering valves on adhesive metering equipment, leveraging the FKM seals to withstand occasional chemical vapor exposure in process skids.
When sizing this actuator, evaluate your force margins carefully. Stepping down to the SDA32 yields 402.1 N of push at 0.5 MPa, while stepping up to the SDA50 provides 981.7 N. The 628.3 N output at 0.5 MPa translates to a safe working load of roughly 377 N (about 60% capacity) or a vertical lift of approximately 32 kg with a 2:1 safety margin. Confirm your ordering essentials: 40 mm bore, 70 mm stroke, PT1/8 port, female M8x1.25 rod thread, and FKM seals.
Note that a standard compact cylinder does not hold its position if air pressure is lost or the directional valve is centered; the piston will drift. The fixed bumper only decelerates the stroke near its end and does not function as a lock or brake. If your application requires strict load holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
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, with a proof pressure of 1.5 MPa, and the operating speed spans 30-500 mm/s.
No, this specific SKU does not include a piston magnet. To use AirTAC reed or electronic switches in the body grooves, you must specify the -S option when ordering. Additionally, this unit relies on fixed NBR bumpers for end-stop deceleration, which cannot be field-adjusted like an air cushion.
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