The AirTAC SC50 Standard Cylinder SC50X685S 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 SC50X685S is a double-acting tie-rod cylinder with a 50 mm bore and a non-standard 685 mm stroke, built for applications that need a longer reach than the standard catalog offers. At 0.5 MPa air pressure it generates 982 N pushing force and 825 N pulling force, while at the maximum operating pressure of 0.9 MPa the push thrust rises to 1767 N, giving a solid force margin for medium-duty linear tasks.
This model includes a built-in magnet (-S suffix), so CMSG, DMSG, or EMSG reed and solid-state sensors can be clamped directly onto the barrel for piston position feedback. The 20 mm diameter piston rod with M16x1.5 male thread handles typical axial loads, and the 21 mm adjustable air cushion at each end decelerates the piston quietly. The body length A is 150 mm, making the total extended length approximately 835 mm.
| Model | Airtac SC50 Standard Cylinder SC50X685S |
|---|---|
| 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.
The 685 mm stroke moves parts between distant conveyor stations. The built-in magnet lets sensors confirm full extension and retraction at each end.
Extends a dispensing head across a wide panel. The 982 N push force at 0.5 MPa is ample for smooth, controlled motion without stalling.
Pushes a row of boxes into alignment on a pallet. The adjustable cushion absorbs impact quietly, and the magnet enables mid-stroke sensing for partial-stroke logic.
Choose the SC50 when your load needs roughly 982 N push at 0.5 MPa. If you can accept a smaller footprint, the SC40 delivers 628 N at the same pressure; if you need more force, the SC63 provides 1559 N. This 685 mm stroke is a made-to-order length exceeding the 1200 mm maximum standard stroke for bore 50, so confirm lead time.
At 685 mm stroke the unsupported rod length is significant. Any side load, even a small one, can bend the rod or wear the bearing, so use an external linear guide or a guided cylinder assembly. For replacement, match five points exactly: 50 mm bore, 685 mm stroke, PT port thread, the built-in magnet (-S), and the basic (no accessory) mounting style.
Quick checklist
At 0.5 MPa the push force 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. The theoretical maximum force at 1.0 MPa is 200 kgf.
No, you must match the exact 685 mm stroke. Standard SC50 strokes stop at 1200 mm max, but 685 mm is not a standard catalog length. Order the identical SC50X685S code to get the correct made-to-order stroke, built-in magnet, and PT ports.
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