The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X250-10S 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, 250mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X250-10S is a double-acting, single-rod pneumatic cylinder that delivers a robust 1559 N of push force at 0.5 MPa (2805 N at 0.9 MPa). Its defining feature is the rear-cap adjusting screw, which provides up to 10 mm of field-adjustable stroke-end reduction, allowing you to fine-tune the 250 mm nominal stroke for precise end-positioning without swapping the cylinder.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for reliable end-of-stroke detection. The 20 mm rod, M16x1.5 rod thread, and 28 mm air cushion work together to handle deceleration, while the PT1/4 port ensures straightforward pneumatic connection.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X250-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 250 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. |
| ×250 | 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.
The 10 mm screw adjustment lets technicians dial in the exact stroke end during machine commissioning, compensating for minor fixture variations without needing to re-machine stops or order different cylinders.
Ideal for a conveyor gate or diverter where the retracted position must be precisely set to align with different product widths. The 250 mm stroke provides ample reach, and the sensor confirms the gate is open.
Used in a clamping fixture where the final clamp position needs fine-tuning for material thickness variation. The 2805 N force at 0.9 MPa provides a powerful, controlled clamping action, and the magnet confirms clamp engagement.
Choose this 63 mm bore when the 50 mm bore's 982 N push force at 0.5 MPa is marginal for your load. If your application requires a fixed, non-adjustable stroke, the standard SC63X250 is a more cost-effective alternative. The adjustable stroke is ideal for commissioning trials or format changeovers where the end position needs periodic tweaking.
For replacement, match with another AirTAC SCJ63X250-10S to guarantee identical bore, 250 mm nominal stroke, 10 mm adjust range, PT thread, and the integrated magnet. At this 250 mm stroke, side-loading is generally manageable, but for high-speed or offset loads, consider an external guide rail or switching to a guided cylinder to protect the rod and bearing from bending moments.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N (due to the 20 mm single rod). At the maximum operating pressure of 1.0 MPa, the theoretical push force is 318 kgf. The adjusting screw does not alter the cylinder's force output.
No, as a standard double-acting cylinder, it will not hold position if air pressure is exhausted or the directional valve is centered. The air cushion only decelerates the piston at the stroke end. If load holding is required without live pressure, you must add a pilot-operated check valve or an external mechanical rod lock.
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