The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-30SH is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø63mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X50-30SH is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the piston stop position by up to 30 mm without swapping the unit. With a 63 mm bore and 20 mm rod, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it a strong choice for medium-duty clamping and positioning tasks.
This model is built with Viton (FKM) seals, extending the operating temperature range to 0–150 °C for hot or aggressive environments, and includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors. The rear adjusting screw shortens the stroke end from the nominal 50 mm maximum, and the body length A is 197 mm with a 28 mm air cushion for smooth deceleration.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-30SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 30 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. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -30 | 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.
Fine-tune the pressing depth on a heated platen press. The Viton seals handle the 150°C environment while the 30 mm screw adjustment lets operators dial in the exact compression without mechanical stops.
Adjust the end position for different product sizes on a packaging machine. The built-in magnet allows CMSG sensors to confirm the retracted position, enabling quick, repeatable format changeovers.
Compensate for tooling wear in a welding fixture over time. Instead of shimming the tool, the operator simply turns the rear screw to advance the 20 mm rod and maintain precise part contact.
Step up to the 80 mm bore SCJ if you need more force—it provides 2513 N of push at 0.5 MPa. For applications that don't require field adjustment of the stroke end, the fixed-stroke SC63 is a simpler, cost-effective alternative. A direct replacement must match the 63 mm bore, 50 mm nominal stroke, 30 mm adjust range, PT ports, and the -S magnet option. At this short 50 mm stroke, side loading is rarely a concern, but always align the rod with the load to maximize seal life.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The pull force is lower due to the area of the 20 mm piston rod. At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N.
Only if you do not need the 30 mm stroke-end adjustment. The SCJ has a rear adjusting screw that the fixed-stroke SC lacks. For a direct SCJ replacement, ensure the new cylinder matches the 63 mm bore, 50 mm nominal stroke, 30 mm adjust range, PT ports, and the -S magnet option.
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