The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X175-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø63mm bore, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X175-50 is a double-acting, single-rod pneumatic cylinder that puts a 50 mm field-adjustable stroke range at your fingertips, letting you fine-tune the end position without swapping hardware. At 0.5 MPa it delivers 1559 N of push force and 1402 N on the pull stroke, backed by a 20 mm piston rod and a 28 mm air cushion that decelerates the load smoothly.
This 63 mm bore tie-rod cylinder has a nominal maximum stroke of 175 mm and a body length of 197 mm, with a PT1/4 port and M16x1.5 rod thread. The rear-cap adjusting screw shortens the stroke end by up to 50 mm, making it ideal for commissioning trials, format changeovers, or taking up mechanical wear without disrupting the machine layout.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X175-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 175 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| 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 SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. 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 (@1.0 MPa) | 318 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×175 | Nominal (maximum) stroke length in mm. |
| -50 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Dial in the exact stroke end during machine commissioning with the 50 mm rear screw, eliminating the need to shim or reposition the cylinder body.
Quickly adjust the push stroke for different product sizes on packaging or sorting lines, reducing downtime between batches.
Take up mechanical play or seal wear over time by advancing the stroke end, maintaining consistent part contact without replacing the actuator.
Step up to an 80 mm bore if your application needs more than the 1559 N push force this 63 mm unit provides at 0.5 MPa—the SCJ80 delivers 2513 N at the same pressure. If you never need to alter the stroke after installation, the fixed-stroke SC63 series is a simpler, cost-effective alternative. For a direct replacement, match the 63 mm bore, 175 mm nominal stroke, 50 mm adjust range, PT thread, and basic mounting; add the -S suffix if your existing unit uses a magnetic piston for sensors. At this 175 mm stroke, rod deflection is minimal, but if the load applies any side force, consider an external guide rail to protect the rod bearing.
Adjustable-stroke checklist
At 0.5 MPa, it generates 1559 N pushing and 1402 N pulling. At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
Yes, if you need the 50 mm field-adjustable stroke range. The SCJ63X175-50 shares the same 63 mm bore, PT1/4 port, and basic mounting footprint as the SC63, but the rear adjusting screw adds length. Ensure your machine has clearance for the longer body and that the 175 mm nominal stroke matches your original unit.
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