The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X150-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø63mm bore, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X150-40S is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 40 mm of field-adjustable stroke-end reduction, making it ideal for commissioning and fine-tuning without swapping the cylinder. At 0.5 MPa, it delivers a push force of 1559 N and a pull force of 1402 N, driven by a 20 mm rod through PT1/4 ports.
This model includes a built-in magnet (-S), allowing CMSG/DMSG/EMSG sensors to be clamped directly onto the tie-rod barrel for reliable end-of-stroke detection. The 28 mm air cushion at each end decelerates the piston smoothly, and the body length A(SCJ) is 197 mm, providing a compact yet powerful solution for adjustable-position applications.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X150-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 40 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. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -40 | 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.
Quickly adjust the end-stop position for different product sizes on packaging or filling lines without mechanical rework, using the 40 mm adjustment range.
Fine-tune the final clamping depth or press-fit insertion point in assembly fixtures, compensating for part tolerances with the rear adjusting screw.
Adjust the stroke end to take up mechanical wear in grippers or linkages over time, maintaining precise operation without replacing the cylinder.
Choose the SCJ63 bore when your application needs the step up in force from the SCJ50 (982 N push at 0.5 MPa) but does not require the full capacity of the SCJ80 (2513 N push). The 40 mm adjustment range on this model is particularly useful for processes that need a generous tuning window. If your stroke is fixed after commissioning, the standard SC63 fixed-stroke cylinder is a more economical alternative.
For direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with a 63 mm bore, 150 mm nominal stroke, and a 40 mm adjustment range, with PT ports and a built-in magnet. At a 150 mm stroke, the rod is well-supported, but for applications with significant side loads, consider adding an external guide unit.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the push force is 1559 N and the pull force is 1402 N. The maximum push force at 0.9 MPa is 2805 N. The pull force is lower due to the area of the 20 mm piston rod.
A screw in the rear cap limits the piston's retraction, allowing you to shorten the stroke end by up to 40 mm from the nominal 150 mm. It is a mechanical stop for position tuning, not a force or speed adjuster, and does not lock the piston in place when air pressure is removed.
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