The AirTAC AirTAC SDA100X40S Compact Cylinder | 100mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø100mm bore and 40mm stroke, PT3/8 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
The AirTAC SDA100X40S is a double-acting, single-rod compact cylinder engineered to deliver substantial thrust in tight axial envelopes. It generates 3927 N of push force and 3524.9 N of pull force at 0.5 MPa, peaking at an 801 kgf theoretical maximum at 1.0 MPa. The riveted unibody architecture merges the barrel, rear cover, piston and rod to drastically reduce overall length compared to conventional round-body units.
This 100mm bore variant features a robust 32mm piston rod and PT3/8 air ports. Because this configuration includes the S option, a built-in piston magnet enables position detection via an AirTAC reed or electronic switch seated in the body grooves. End-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, meaning high-energy cycles may require external shock absorbers.
| Model | AirTAC SDA100X40S Compact Cylinder | 100mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø100 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | PT3/8 |
| Rod end thread | M18×1.5 female / M26×1.5 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 | 3927 N | 3525 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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. |
|---|---|
| 100 | Bore size in mm. |
| ×40 | 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 heavy ejector pins on large injection molding platens where the 5497.8 N extend force at 0.7 MPa reliably strips dense plastic parts from deep cavities.
Acts as a compact hold-down or positioning actuator on thick sheet metal press brakes, utilizing the 32mm rod to resist deflection during aggressive bending cycles.
Provides the vertical lifting power for heavy palletizer load stations, moving 200.2 kg payloads vertically with a 2:1 safety factor within a minimal machine footprint.
Selecting this 100mm bore provides massive output, yielding a safe working load around 2356 N (approximately 60% of the 3927 N push at 0.5 MPa) and a vertical lift capacity of roughly 200.2 kg with a 2:1 safety margin. If your application requires less force, stepping down to the SDA80 offers 2513.3 N at 0.5 MPa; as the largest standard size, there is no larger SDA bore. When ordering, confirm the 40mm stroke, PT3/8 porting, the S magnet option, and the female M18x1.5 rod-end thread.
Keep in mind that a standard double-acting cylinder will not hold a load if air pressure drops or the valve is centered, as the piston will drift and the fixed bumper only decelerates near the stroke end rather than locking it. To suspend a load safely without live pressure, you must integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
Quick checklist
This 100mm bore double-acting cylinder provides 3927 N push and 3524.9 N pull at 0.5 MPa, 5497.8 N push and 4934.8 N pull at 0.7 MPa, with a theoretical maximum push of 801 kgf at 1.0 MPa.
No, the SDA100X40S uses a fixed NBR bumper at each end to decelerate the piston, not an adjustable air cushion. For high-speed or high-mass cycles, you should add an external shock absorber or reduce the approach speed.
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