The AirTAC Airtac SC Standard Cylinders SC63X650S is a genuine double-acting standard air cylinder with a Ø63mm bore and 650mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC63X650S is a double-acting AirTAC SC tie-rod cylinder with a 63 mm bore and a 650 mm stroke. At 0.5 MPa it delivers about 1559 N on extension and 1402 N on retraction, rising to 2182 N at 0.7 MPa and 2805 N at the 0.9 MPa maximum operating pressure. The S suffix means a magnet is built into the piston, so CMSG, DMSG or EMSG switches can clamp directly onto the barrel for end-of-stroke or mid-stroke signalling.
This model uses TPU seals rated -20 to +70 C and PT1/4 ports as standard. The 20 mm rod carries a M16x1.5 knuckle thread, the adjustable cushion is 28 mm long, and body length A is 153 mm, giving an approximate extended length of 803 mm. The 650 mm stroke sits well inside the 1500 mm maximum standard stroke for this bore, so it is a catalogue item, not a made-to-order length.
| Model | Airtac SC Standard Cylinders SC63X650S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke | 650 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, 28 mm |
| Max stroke | Up to 1500 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 | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (approx.) | 318 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. |
|---|---|
| 63 | Bore size in mm. |
| ×650 | 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.
Long-reach clamping and positioning on assembly fixtures, where the magnet signals full clamp or release to the PLC without external limit switches.
Pushing or diverting product across a wide conveyor at 650 mm travel, using the 28 mm adjustable cushion to settle the load gently at stroke end.
Lifting gates or hatches through a tall stroke; note the cylinder drifts down if air pressure is lost, so add a pilot-operated check valve or mechanical lock where hold-open is critical.
At 650 mm of stroke this cylinder spans a long working envelope, so plan for side load: a 20 mm rod unsupported over that length will bend if the load is not guided. Use an external guide or a guided cylinder whenever the tooling cannot guarantee pure axial force. If 1559 N at 0.5 MPa leaves too little margin, step up to the 80 mm bore, which produces about 2513 N under the same pressure; if your load is light, the 50 mm bore at roughly 982 N may be the more economical choice.
Replacing an existing unit? Match all five points: 63 mm bore, 650 mm stroke, PT1/4 port thread, the same mounting accessory (this code is basic, with no bracket), and the -S magnet option. The SC is a compact tie-rod cylinder, shorter than an ISO 15552 profile, so it is not dimensionally interchangeable with ISO 15552 bodies.
Quick checklist
At 0.5 MPa it pushes with 1559 N and pulls with 1402 N. At the maximum operating pressure of 0.9 MPa the push force reaches 2805 N, and the theoretical maximum at 1.0 MPa is about 318 kgf. Subtract a safety margin for friction and real-world losses.
With a 650 mm stroke on a 20 mm rod, side load is the main risk: use an external guide or a guided cylinder so the rod sees axial force only. And no, the SC is double acting with no holding function - if pressure drops the piston drifts, so fit a pilot-operated check valve or mechanical lock for load-holding duty.
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