The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-75S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø63mm bore, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X500-75S is a double-acting, single-rod pneumatic cylinder that puts fine stroke control directly on the machine. Its rear-cap adjusting screw provides up to 75 mm of stroke-end reduction, allowing operators to dial in the exact 500 mm nominal stroke limit without swapping the cylinder or adding external hard stops. This model includes a built-in magnet, so CMSG/DMSG/EMSG sensors can be clamped directly onto the tie-rod barrel for reliable end-of-stroke detection.
Built on the rugged SCJ tie-rod platform, this 63 mm bore unit delivers 1559 N of push force at a standard 0.5 MPa supply, rising to 2805 N at the 0.9 MPa maximum operating pressure. The 20 mm diameter piston rod and 28 mm air cushion at each end ensure smooth, controlled deceleration. With a body length of 197 mm plus stroke, it is a compact yet powerful solution for applications where the working stroke needs to be tuned during commissioning or changeovers.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 500 mm |
| Stroke adjustment | Up to 75 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. |
| ×500 | Nominal (maximum) stroke length in mm. |
| -75 | 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 75 mm adjustment screw lets integrators precisely set the stroke end during machine setup, compensating for stack-up tolerances in tooling without re-machining any parts.
Quickly adapt the cylinder's stroke for different product sizes on a packaging or assembly line. The operator adjusts the rear screw to match the new format, minimizing downtime between batches.
In high-cycle clamping or pressing fixtures, the adjustable stroke can be incrementally extended over time to compensate for pad or tooling wear, maintaining consistent contact force without replacing the cylinder.
Choose the SCJ63 bore when your application needs the 1559 N push force at 0.5 MPa. If you require a lighter, more compact actuator, stepping down to the 50 mm bore reduces push force to 982 N. For significantly higher force demands, the 80 mm bore delivers 2513 N at the same pressure. This adjustable-stroke model is the right pick when the exact stroke endpoint must be field-tuned; if the stroke is fixed and never changes, the standard SC63X500 fixed-stroke cylinder is a more economical alternative. For a direct replacement, match the 63 mm bore, 500 mm nominal stroke, 75 mm adjustment range, PT port thread, and the -S magnet option. At a 500 mm stroke, be mindful of side loading on the 20 mm rod—consider an external guide rail or a guided cylinder if the load is not perfectly axial.
Adjustable-stroke checklist
This is a single-rod cylinder, so push and pull forces differ. At 0.5 MPa, the theoretical push force is 1559 N and the pull force is 1402 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 2805 N. The rear adjusting screw only changes the stroke end position; it does not alter the cylinder's force output.
Yes, provided you need the 75 mm stroke-end adjustment feature. The SCJ63X500-75S shares the same bore, 500 mm nominal stroke, and mounting accessories as the SC63 series. Ensure your replacement matches the PT port thread and the -S magnet option for sensor compatibility. The SCJ body is slightly longer than a fixed-stroke SC to house the adjusting mechanism.
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