The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X200-50SH 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, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X200-50 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides 50 mm of field-adjustable stroke reduction. In this 63 mm bore class, it delivers 1559 N of push force at 0.5 MPa, making it a robust solution for medium-duty automation tasks where the end position needs fine-tuning during commissioning or format changes.
This model includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors and is configured with Viton (FKM) seals, extending the operating temperature range to 0–150°C for hot or aggressive environments. The 20 mm diameter rod and 28 mm air cushion ensure reliable deceleration, while the PT1/4 ports maintain compatibility with standard pneumatic fittings.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X200-50SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 200 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. |
| ×200 | 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.
The 50 mm adjustment range allows operators to quickly dial in a new end-stop position for different product variants on the same fixture, minimizing changeover time.
With Viton seals rated for 0–150°C, this cylinder is suited for clamping and ejecting parts in heated platen presses where standard seals would degrade.
As gripper pads or tooling surfaces wear down, the rear adjusting screw can be turned to incrementally advance the stroke end, maintaining consistent clamping force without replacing parts.
Choose the SCJ63 when your application requires a force of roughly 1560 N push at standard plant pressure. If you need a lighter, more compact actuator, the 50 mm bore SCJ50 delivers 982 N push, while stepping up to the 80 mm bore SCJ80 provides 2513 N for heavier loads. The 50 mm adjustable stroke range is ideal for taking up tooling wear or accommodating multiple product heights without swapping the cylinder.
For a direct replacement, match the 63 mm bore, 200 mm nominal stroke, 50 mm adjust range, PT port thread, and the -S magnet option. This cylinder uses basic mounting, so no additional brackets are included. If your application involves significant side loads on the 200 mm stroke, consider adding an external guide rail or switching to a guided cylinder to prevent rod bending.
Adjustable-stroke checklist
A screw in the rear cap mechanically limits the piston's return stroke. By turning the screw, you can shorten the effective stroke by up to 50 mm from its nominal 200 mm maximum. This sets a precise, repeatable end position without altering the cylinder's 1559 N push force at 0.5 MPa.
No. As a standard double-acting cylinder, the SCJ63X200-50 will drift or drop if air pressure is exhausted or the directional valve is centered. The air cushion only decelerates the piston at stroke end and the adjusting screw only sets the end position; neither acts as a lock. For load holding without live pressure, you must add an external rod brake or a pilot-operated check valve.
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