The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X25-10 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 SCJ63X25-10 is a double-acting, single-rod pneumatic cylinder that delivers 1559 N of push force at 0.5 MPa, making it a solid mid-range actuator for industrial tasks. Its defining feature is a rear-cap adjusting screw that provides up to 10 mm of fine-tunable stroke reduction, allowing you to dial in the exact end position without swapping the cylinder or adding external hard stops.
With a 20 mm piston rod, a 28 mm air cushion for smooth deceleration, and a PT1/4 port, this genuine AirTAC cylinder is built for reliable, repeatable motion. The adjustable stroke is ideal for commissioning trials, format changeovers, or compensating for wear in the tooling.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X25-10 |
|---|---|
| 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.
Use the 10 mm adjustment screw to precisely calibrate the retract end position during machine commissioning, ensuring perfect alignment with fixtures or sensors without mechanical rework.
In high-cycle clamping or pressing operations, the adjustable stroke can be tweaked over time to compensate for wear on contact surfaces, maintaining consistent clamp force and part quality.
Quickly adjust the stroke end for different product sizes on a packaging or assembly line. The 10 mm range allows operators to switch between formats in seconds with a simple screw adjustment.
Choose the SCJ63 when you need the 1559 N push force at 0.5 MPa that this 63 mm bore provides. If your force requirement is lower, the 50 mm bore SCJ50 offers 982 N of push at the same pressure in a lighter package. For higher force, step up to the SCJ80 which delivers 2513 N. The adjustable stroke is the key differentiator; if your application has a fixed, unchanging stroke, the standard SC series offers the same force in a slightly more compact body. When replacing, match the 63 mm bore, 25 mm nominal stroke, 10 mm adjustment range, PT thread, and basic mounting.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The pull force is lower due to the area of the 20 mm piston rod. At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N.
A rear adjusting screw lets you shorten the stroke end by up to 10 mm from the 25 mm nominal maximum. Pick the SCJ when you need to fine-tune the stroke position on the machine for tasks like setup, changeover, or wear take-up. If your stroke is permanently fixed, the standard SC cylinder is a simpler, more cost-effective choice.
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