The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X25-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø63mm bore, 25mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X25-10S is a double-acting, single-rod pneumatic cylinder that delivers 1559 N of push force at 0.5 MPa, making it a robust actuator for medium-duty automation tasks. Its defining feature is the rear-cap adjusting screw, which provides up to 10 mm of field-adjustable stroke-end reduction, allowing technicians to fine-tune the piston's stopping position without removing the cylinder from the machine.
This model is built with a 20 mm diameter piston rod and an M16x1.5 rod thread for secure tooling attachment. The integrated magnet allows for direct mounting of CMSG/DMSG/EMSG sensors along the tie-rod barrel, enabling precise, non-contact end-of-stroke detection. With a 28 mm air cushion and a body length of 197 mm, it offers reliable deceleration in a compact footprint.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X25-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 25 mm |
| Stroke adjustment | Up to 10 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. |
| ×25 | Nominal (maximum) stroke length in mm. |
| -10 | 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 end-stop position during initial machine commissioning to compensate for tolerance stack-ups in welded frames or fabricated brackets, ensuring perfect alignment without re-machining.
Adjust the stroke end to set a precise clamping gap for workpieces of varying thickness in a pressing or holding fixture, preventing part damage from over-travel.
Periodically adjust the stroke to take up mechanical wear on contact surfaces, tooling tips, or sealing faces, maintaining consistent process quality over the cylinder's service life.
Select this 63 mm bore model when your application requires a push force around 1559 N at standard plant pressure. If your load demands more force, stepping up to the 80 mm bore provides 2513 N of push force at the same 0.5 MPa. For applications with a fixed, unchanging stroke, a standard SC63X25 cylinder is a simpler, more cost-effective choice, while a guided cylinder should be used if the tooling introduces high side loads. This SCJ63X25-10S is a direct replacement for any AirTAC SCJ cylinder of the same 63 mm bore, 25 mm nominal stroke, 10 mm adjustment range, PT port thread, and built-in magnet.
Adjustable-stroke checklist
At 0.5 MPa operating pressure, this cylinder generates 1559 N of push force and 1402 N of pull force. The push force is greater because the single piston rod reduces the effective area on the return stroke. The maximum push force at 0.9 MPa is 2805 N.
Yes, if you need the ability to fine-tune the stroke end. The SCJ63X25-10S has the same mounting footprint and port size (PT1/4) as a standard SC63 cylinder but adds a rear adjusting screw. Ensure your machine has clearance for the slightly longer body length (197 mm) and the adjustment mechanism.
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