The AirTAC Airtac SC40 Standard Cylinder SC40X645SCB is a genuine double-acting standard air cylinder with a Ø40mm bore and 645mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X645SCB is a tie-rod double-acting pneumatic cylinder delivering 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa). Its 40 mm bore and 645 mm stroke suit mid-force linear tasks where a long reach is required, and the 16 mm diameter piston rod provides good column strength for pushing loads.
This model includes a built-in magnet (-S) for mounting CMSG/DMSG/EMSG sensors directly on the barrel, plus a rear double clevis mount (CB, accessory F-SC40CB) for pivoting attachment. The adjustable air cushion (21 mm) decelerates the piston smoothly, and the PT1/4 ports connect with standard fittings.
| Model | Airtac SC40 Standard Cylinder SC40X645SCB |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 645 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (approx.) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SC | Standard tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×645 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
The 645 mm stroke moves parts between distant conveyor lanes or workstations, with the rear clevis allowing the cylinder to pivot as it cycles.
628 N of force securely clamps medium workpieces during machining or welding, and the magnetic piston lets you verify clamp position with barrel-mounted sensors.
The double clevis mount handles the arcing motion of a material diverter gate, while the long stroke provides the necessary travel to fully open or close a chute.
Choose the SC40 when your application needs around 628 N of force at standard plant pressure. If you need more thrust, stepping up to the SC50 bore provides 982 N at 0.5 MPa. For strokes of 300 mm or more like this 645 mm model, side loads on the extended 16 mm rod can cause bending—use an external linear guide or a guided cylinder if the load is not perfectly axial.
For a direct replacement, match these five points: 40 mm bore, 645 mm stroke, PT1/4 port thread, the rear double clevis mount (CB), and the built-in magnet (-S) for sensor compatibility. The SC is a tie-rod cylinder and is not dimensionally interchangeable with ISO 15552 profile cylinders.
Quick checklist
At 0.5 MPa, push force is 628 N and pull force is 528 N. At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N. The theoretical maximum force at 1.0 MPa is 128 kgf.
No. The SC40 is a double-acting cylinder and will not hold position when pressure is exhausted or the valve is centered. If load holding is required, you must add an external rod lock, a pilot-operated check valve, or a mechanical brake—the adjustable air cushion only decelerates the piston at end of stroke.
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