The AirTAC AirTAC SDA40X50SB Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 50mm 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 SDA40X50SB is a double-acting single-rod compact cylinder engineered to deliver a 628.3 N push and 527.8 N pull 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 designs. The 40 mm bore features a hard-anodized inner wall and a two-way piston seal for reliable pneumatic operation.
This specific configuration includes a built-in piston magnet (-S) for direct mounting of AirTAC reed or electronic switches along the body grooves, and a male M14x1.5 threaded rod end (-B) for secure mechanical coupling. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable cushion, meaning external shock absorbers should be specified for high-energy cycles.
| Model | AirTAC SDA40X50SB Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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. |
| ×50 | 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 stripper plates in plastic injection molding machines where the 628.3 N extend force breaks parts free, utilizing the short body to fit within tight mold platens.
Actuates side flap folders on continuous motion cartoners, using the 50 mm stroke and male M14x1.5 rod to push corrugated material cleanly at cycle speeds up to 500 mm/s.
Positions back-gauge fingers on light gauge sheet metal bending equipment, where the hard-anodized bore resists wear from repetitive high-speed positioning moves.
When sizing this 40 mm bore, stepping down to the SDA32 yields 402.1 N of push force, while stepping up to the SDA50 provides 981.7 N at 0.5 MPa. Based on the 628.3 N push figure, the computed safe working load is approximately 377 N (around 60% capacity), translating to a vertical lift capability of roughly 32 kg with a 2:1 safety margin. Ensure your ordering essentials match this exact configuration: 40 mm bore, 50 mm stroke, PT1/8 port, built-in magnet, and male M14x1.5 rod thread.
Keep in mind 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, and the fixed bumper only decelerates the stroke near its end without acting as a mechanical lock. If your application requires strict load holding, integrate an external rod lock or a pilot-operated check valve into the pneumatic circuit.
Quick checklist
This double-acting 40 mm bore 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 and 1.0 MPa, with a proof pressure of 1.5 MPa, and supports a speed range of 30-500 mm/s.
No, it uses a fixed NBR bumper at each end to decelerate the stroke, which is not field-adjustable; external shock absorbers are recommended for high-energy loads. Additionally, the -B option specifies a male M14x1.5 threaded piston rod instead of the default female M8x1.25 thread.
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