The AirTAC AirTAC SDA40X65S Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 65mm 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 SDA40X65S 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 abbreviated unit, drastically reducing axial mounting depth compared to conventional round-body actuators. The hard-anodized bore and two-way piston seal ensure durable, low-friction operation.
This specific configuration includes an S option, meaning a built-in piston magnet enables position sensing via AirTAC reed or electronic switches fitted into the body grooves. The 16 mm piston rod utilizes a female M8x1.25 thread, and end-stroke deceleration is handled strictly by a fixed NBR bumper rather than an adjustable air cushion.
| Model | AirTAC SDA40X65S Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 65 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. |
| ×65 | 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 medium-weight cartons from a main conveyor belt to a sorting lane using the 628.3 N extend force over the 65 mm travel distance.
Secures aluminum housings inside a machining center, leveraging the 16 mm rod and female M8x1.25 thread to drive a custom clamping arm.
Raises lightweight pallet stops in an assembly line, where the built-in S magnet triggers an electronic switch to confirm the 65 mm elevation.
When sizing this 40 mm bore actuator, consider stepping down to the SDA32, which yields 402.1 N of push force at 0.5 MPa, or moving up to the SDA50 for 981.7 N at the same pressure. The 65 mm stroke is well within the 130 mm maximum standard stroke for this bore. A practical safe working load is roughly 377 N (about 60% of the 0.5 MPa push figure), translating to a vertical lift capacity of approximately 32 kg with a 2:1 safety margin.
Because this is a double-acting cylinder, it does not hold its position if air pressure drops or the control valve is centered; the piston will drift, as the fixed NBR bumper only decelerates the stroke end and acts as neither a lock nor a brake. For suspended loads requiring fail-safe holding, an external rod lock or pilot-operated check valve is required. When ordering, confirm the 40 mm bore, 65 mm stroke, PT1/8 port, female M8x1.25 rod thread, and the S magnet option.
Quick checklist
This 40 mm bore cylinder provides a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa. At 0.7 MPa, the push increases to 879.6 N. The theoretical maximum push is 128 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a proof pressure of 1.5 MPa, and runs at speeds from 30 to 500 mm/s.
No, it uses a fixed NBR bumper at each end to decelerate the stroke, which cannot be field-adjusted like an air cushion. Additionally, it does not hold its load if air is lost; the piston drifts, so an external rod lock or pilot-operated check valve is needed for position holding.
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