The AirTAC SC50 Standard Cylinder SC50X685 is a genuine double-acting standard air cylinder with a Ø50mm bore and 685mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC50X685 is a double-acting tie-rod cylinder delivering 982 N of push force at 0.5 MPa and up to 1767 N at the maximum operating pressure of 0.9 MPa. With a 50 mm bore and a 20 mm diameter piston rod, this model is built for medium-duty linear actuation tasks requiring a substantial 685 mm stroke.
This cylinder features an adjustable pneumatic cushion (21 mm length) at both ends to decelerate the piston smoothly, reducing end-of-stroke impact. The body length A is 150 mm, giving a total extended length of approximately 835 mm. It uses PT1/4 port threads and an M16x1.5 rod thread for easy integration into pneumatic circuits.
| Model | Airtac SC50 Standard Cylinder SC50X685 |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 685 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (approx.) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×685 | 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.
Provides the 685 mm stroke needed to sweep defective products off a wide conveyor line, using its 1374 N force at 0.7 MPa to reliably divert packages.
Ideal for clamping large workpieces in woodworking or metal fabrication jigs where a deep reach is required before applying 982 N of holding force at 0.5 MPa.
Actuates the tipping mechanism on bulk material bins, using the full 685 mm stroke to achieve a complete pour angle with controlled, cushioned motion.
For applications needing more force, stepping up to the 63 mm bore SC63 series provides 1559 N of push force at 0.5 MPa. If a shorter, more compact solution is acceptable, the 40 mm bore SC40 series offers 628 N at 0.5 MPa. Always match the bore, 685 mm stroke, PT1/4 port thread, and basic mounting when replacing an existing unit.
At a 685 mm stroke, the piston rod is significantly extended. To prevent rod bending or bearing damage, ensure the load is guided externally and side forces are eliminated. For high side-load applications, consider using an external guide rail or switching to a guided cylinder assembly.
Quick checklist
The theoretical push force at 0.5 MPa is 982 N, and the pull force is 825 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N. These values assume standard air pressure and no friction losses.
At 685 mm stroke, the 20 mm rod is susceptible to bending under side loads. The cylinder must only be used for axial pushing/pulling. For any non-axial load, install an external linear guide or rod support to absorb side forces and prevent premature seal and bearing failure.
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