The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-30 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, 90mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X90-30 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that allows the stroke end position to be fine-tuned by up to 30 mm. Operating on filtered air at 0.15–1.0 MPa, this 63 mm bore actuator delivers a push force of 1559 N at 0.5 MPa, making it a robust choice for applications where the final stop position needs on-machine adjustment without swapping the cylinder.
With a 20 mm diameter piston rod and PT1/4 ports, the SCJ63X90-30 includes an adjustable air cushion (28 mm length) for smooth deceleration. Its tie-rod construction provides a serviceable design, and the body length A is 197 mm. This model is configured with the standard TPU seal, PT threads, and a basic mount, ready for direct integration or the addition of SCJ-specific mounting accessories.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 90 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. |
| ×90 | 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.
The 30 mm adjustment screw lets technicians dial in the exact stroke end position during machine commissioning, eliminating the need to fabricate custom hard stops or swap cylinders for minor positional changes.
On packaging or sorting lines, the stroke can be quickly re-adjusted to accommodate different product sizes or spacing, significantly reducing changeover time between batches without any disassembly.
In clamping or pressing operations, the adjustable stroke can be extended slightly over time to compensate for wear on tooling or contact surfaces, maintaining consistent clamping force and process quality.
Step up to an 80 mm bore SCJ if your application requires more than the 2805 N of push force this 63 mm bore provides at 0.9 MPa; the SCJ80 delivers 4523 N. For applications that do not require field-adjustable stroke, the fixed-stroke SC63X90 is a simpler, more cost-effective alternative. If the load must be guided against side forces, especially with this 90 mm stroke, consider adding an external guide rail.
This SCJ63X90-30 is a direct replacement for any AirTAC SCJ63 cylinder with a 90 mm nominal stroke and a 30 mm adjustment range, using PT ports and a basic mount. When replacing, ensure the mounting style matches; if a magnet is needed for sensor feedback, select the -S suffix variant. For pivoting applications, the TC centre trunnion mount with its TCM1 bracket is the correct SCJ accessory.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The maximum push force at the 0.9 MPa operating limit is 2805 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
A screw in the rear cap acts as an adjustable end-stop for the piston, allowing you to shorten the stroke end by up to 30 mm from the 90 mm nominal maximum. It sets the physical stop position and does not control air pressure or speed. The adjustment is made manually on the cylinder body.
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