The AirTAC Airtac SC Standard Cylinders SC63X125 is a genuine double-acting standard air cylinder with a Ø63mm bore and 125mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC63X125 is a 63 mm bore, 125 mm stroke double-acting tie-rod cylinder from AirTAC's SC series. At the common 0.5 MPa working pressure 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 peak. The 20 mm rod and 28 mm adjustable cushion make this compact stroke a good match for short, punchy movements such as clamping, pressing and part ejection.
Ports are PT1/4 and the rod thread is M16x1.5. With a body length A of 153 mm, the fully extended length is roughly 278 mm (153 mm body + 125 mm stroke). The 125 mm stroke is a standard catalogue length for this bore, so no made-to-order lead time applies. Operating range is 0.15-1.0 MPa with air filtered to 40 um, and the TPU seal set works from -20 to +70 C.
| Model | Airtac SC Standard Cylinders SC63X125 |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke | 125 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. |
| ×125 | 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.
With 2182 N available at 0.7 MPa, the SC63X125 has the force for jig clamping, light press operations and crimping over a short 125 mm working stroke.
The 28 mm adjustable cushion decelerates the piston near stroke end, protecting fixtures when the cylinder drives a small slide or indexing head.
A 125 mm throw suits conveyor pushers and product diverters on packaging lines, where the 20 mm rod handles repeated extension cycles at 30-800 mm/s.
At 1559 N push at 0.5 MPa, the 63 mm bore sits between the 50 mm bore (982 N at 0.5 MPa) and the 80 mm bore (2513 N at 0.5 MPa). If your load needs more than roughly 1400 N of retraction force, the 80 mm bore is the safer step up; if your load is under 800 N, the 50 mm bore saves air and space. The 125 mm stroke is short enough that rod bending is rarely a concern, but any side load on the rod should still be minimised with an external guide.
Replacing an existing SC cylinder? Match all five points: 63 mm bore, 125 mm stroke, PT1/4 port thread, the same mounting accessory, and whether a magnet (-S suffix) is fitted. This SC63X125 is a basic-mount unit with TPU seals and PT threads, so it only swaps directly with another AirTAC SC tie-rod cylinder in the same configuration - it is not dimensionally interchangeable with an ISO 15552 profile cylinder, which is longer for the same stroke.
Quick checklist
At 0.5 MPa the SC63X125 pushes with about 1559 N and pulls with about 1402 N. At 0.7 MPa push force rises to 2182 N, and at the 0.9 MPa maximum operating pressure it reaches 2805 N. The theoretical maximum at 1.0 MPa is around 318 kgf.
Match five things: 63 mm bore, 125 mm stroke, PT1/4 port thread, the mounting accessory (this unit is basic mount, so brackets such as F-SC63LB or F-SC63FA are separate), and the -S magnet suffix if position sensors are used. Any AirTAC SC tie-rod cylinder with the same five attributes is a direct replacement; ISO 15552 profile cylinders are longer and will not drop in.
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