The AirTAC AirTAC SDA40X35SN Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 35mm 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 SDA40X35SN 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 unifies the barrel, rear cover, piston, and rod, drastically reducing overall axial length to save machine footprint where a standard round-body unit would not fit. The bore is hard-anodized and utilizes a two-way piston seal for reliable performance.
This specific configuration includes a built-in piston magnet (-S) for direct mounting of AirTAC reed or electronic switches along the body grooves. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning operators should add external shock absorbers for high-energy cycles. The 16 mm piston rod features a female M8x1.25 thread end, operating at speeds between 30 and 500 mm/s.
| Model | AirTAC SDA40X35SN Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 35 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. |
| ×35 | 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).
Deploys a 35 mm stroke to push singulated circuit boards out of a routing fixture, utilizing the 628.3 N thrust to overcome friction without stressing the substrate.
Drives a mechanical arm to tuck corrugated box flaps prior to tape sealing, where the short riveted body conserves valuable space inside the packaging machine frame.
Presses alignment pins into sheet metal enclosures on an assembly line, relying on the magnetic piston to trigger electronic switches for precise position confirmation.
When sizing this actuator, evaluate your force margins carefully. Stepping down, the SDA32 bore provides 402.1 N of push at 0.5 MPa, which may be insufficient for heavier payloads. Stepping up, the SDA50 bore yields 981.7 N at 0.5 MPa, offering a robust alternative if your application demands higher thrust. For the SDA40X35SN, a safe working load is approximately 377 N (about 60% of the 628.3 N capacity), translating to a vertical lift capability of roughly 32 kg with a 2:1 safety margin.
Remember that a standard compact cylinder cannot hold a load if air pressure drops or the valve is centered; the piston will drift, and the fixed NBR bumper only decelerates near the stroke end rather than locking it. For suspended loads, integrate an external rod lock or pilot-operated check valve. To order, confirm the 40 mm bore, 35 mm stroke, PT1/8 port, required magnet (S), and female rod thread.
Quick checklist
This double-acting cylinder generates 628.3 N push and 527.8 N pull at 0.5 MPa, and 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 and 1.0 MPa, with a proof pressure of 1.5 MPa, and supports speeds of 30-500 mm/s.
No, it uses a fixed NBR bumper at each end to decelerate the stroke, which is not a field-adjustable air cushion. Additionally, it does not hold its load if air is lost; the piston drifts. You must use an external rod lock or pilot-operated check valve for position holding.
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