The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X25-30TC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø63mm bore, 25mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X25-30 is a double-acting, single-rod cylinder from AirTAC's SCJ series, designed for applications where the stroke end position must be field-adjusted without replacing the cylinder. Its rear-cap adjusting screw provides up to 30 mm of fine-tuning on the nominal 25 mm stroke, making it ideal for commissioning trials and wear take-up.
With a 63 mm bore, this tie-rod cylinder delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa. It features a 20 mm diameter piston rod with an M16x1.5 thread, PT1/4 ports, and a 28 mm air cushion for smooth deceleration. The TC centre trunnion mount, supplied with the TCM1 bracket, allows the cylinder to pivot, making it suitable for swinging loads.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X25-30TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 25 mm |
| Stroke adjustment | Up to 30 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. |
| -30 | 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 final position of a tooling plate during machine commissioning, using the 30 mm adjustment range to dial in the exact stop point without mechanical shims.
Quickly adapt the stroke end for different product sizes on a packaging line, adjusting the rear screw to handle a new box height in seconds.
Compensate for gradual wear on a conveyor diverter gate's mechanical stop, using the adjustable stroke to maintain precise gate alignment over time.
Choose the SCJ63X25-30 when you need a compact, adjustable-stroke solution for light-duty positioning. If you require more force, stepping up to the 80 mm bore provides 2513 N of push force at the same pressure. For fixed-stroke applications where adjustability is not needed, the standard SC63 series offers a simpler, more cost-effective alternative. This model is a direct replacement for any AirTAC SCJ63 cylinder with a 25 mm nominal stroke, 30 mm adjust range, PT ports, and TC mount. For strokes of 300 mm or more, consider an external guide to manage side loads on the rod.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the cylinder provides 1559 N of push force and 1402 N of pull force. The maximum push force at 0.9 MPa is 2805 N. Because it is a single-rod cylinder, the push force is greater than the pull force due to the rod area.
A rear-cap screw allows you to shorten the stroke end by up to 30 mm from the 25 mm nominal maximum. It is a direct dimensional replacement for another AirTAC SCJ63X25-30 with a TC mount. It cannot replace a fixed-stroke SC cylinder without accounting for the longer body length and the adjusting screw.
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