The AirTAC SC Standard Cylinders SC63X25CB is a genuine double-acting standard air cylinder with a Ø63mm bore and 25mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC63X25CB is a double-acting AirTAC SC tie-rod cylinder with a 63 mm bore and a short 25 mm stroke, ordered with the CB rear double-clevis mount already coded into the part number. At the common 0.5 MPa working pressure it pushes with about 1559 N and pulls with about 1402 N, rising to roughly 2182 N at 0.7 MPa. The 20 mm rod and 28 mm adjustable cushion give this short-stroke barrel a snappy, well-damped cycle at speeds from 30 to 800 mm/s.
Because the stroke is only 25 mm, the assembled cylinder is very compact: body length A is 153 mm, so the fully extended length is approximately 178 mm. Ports are PT1/4 and the rod thread is M16x1.5. The clevis pin joint at the cap lets the cylinder swing with the load, which is exactly what a short, powerful push on a pivoting lever or linkage needs.
| Model | Airtac SC Standard Cylinders SC63X25CB |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke | 25 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. |
| ×25 | 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.
A 25 mm stroke is ideal for closing a toggle or cam clamp: the 63 mm bore delivers about 1559 N at 0.5 MPa, enough to hold sheet-metal parts through weld or assembly cycles, while the clevis follows the lever's arc.
Mounted on its rear double clevis, the cylinder tips a short deflector or gate arm into the product stream and back out. The 28 mm adjustable cushion softens both ends of the quick 25 mm throw.
Short, forceful pushes on bell cranks and kickers suit this model: 2182 N at 0.7 MPa through a 25 mm stroke, with the clevis joint absorbing the linkage's swing instead of bending the 20 mm rod.
At 1559 N push at 0.5 MPa, this 63 mm bore sits between the SC50 (about 982 N at 0.5 MPa) and the SC80 (about 2513 N at 0.5 MPa). Step down to the 50 mm bore if your clamp force has margin, or up to the 80 mm bore when the load grows. The 25 mm stroke is well inside the 1500 mm maximum standard stroke for this bore, so it is a catalogue item, not a made-to-order build.
The CB double clevis is part of this code; the matching pivot pin hardware is ordered as accessory F-SC63CB. Replacing an existing unit? Match all five points: 63 mm bore, 25 mm stroke, PT1/4 port thread, CB clevis mounting, and no magnet (this code carries no -S option). Keep the clevis pin axis parallel to the load's pivot axis so the swing stays free of side load on the rod.
Quick checklist
At 0.5 MPa the 63 mm bore gives about 1559 N on extension and 1402 N on retraction. At 0.7 MPa push force is about 2182 N, and at the 0.9 MPa upper operating range it reaches roughly 2805 N. Theoretical maximum at 1.0 MPa is about 318 kgf. Subtract a safety margin of 20-25% for real loads.
It is a direct match for another AirTAC SC tie-rod cylinder of the same 63 mm bore, 25 mm stroke, PT1/4 port thread, CB double-clevis mounting and no magnet option; it is not an ISO 15552 profile cylinder and is shorter than one. Note that like any double-acting cylinder it will not hold a load when pressure is lost or the valve is centred - the piston can drift. If your linkage must stay put without live air, add a pilot-operated check valve or a mechanical lock.
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