The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X225-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø63mm bore, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X225-75 is a 63 mm bore double-acting, single-rod air cylinder that lets you fine-tune the stroke end position by up to 75 mm without removing the cylinder from the machine. With a 20 mm piston rod, PT1/4 ports, and an M16x1.5 rod thread, it delivers 1559 N of push force at 0.5 MPa, scaling to 2805 N at the 0.9 MPa maximum operating pressure.
A rear-cap adjusting screw physically sets the retract end stop, making this cylinder ideal for commissioning trials, format changeovers, and wear take-up where the exact stroke length must be dialled in on-site. The 28 mm air cushion decelerates the piston smoothly, and the tie-rod construction keeps service straightforward. This model ships in the basic mounting configuration with TPU seals and PT threads.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X225-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 75 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. |
| ×225 | Nominal (maximum) stroke length in mm. |
| -75 | 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.
Dial in the exact 225 mm stroke end position on a new assembly line. The 75 mm adjustment screw allows engineers to fine-tune the actuator's stopping point without swapping cylinders or machining custom stops.
Quickly adapt a pusher or diverter station for a new product size. The field-adjustable stroke lets operators shorten the cylinder's travel to match different box or pallet dimensions in minutes.
Take up mechanical play in a clamping or pressing fixture over time. As tooling wears, the rear adjusting screw can incrementally extend the effective stroke to maintain consistent contact force and position.
Choose the SCJ63 bore when your application needs roughly 1560 N of push force at standard shop air. If you need more force, stepping up to the 80 mm bore provides 2513 N push at 0.5 MPa; if you need less, the 50 mm bore delivers 982 N. The 75 mm adjustable range on this model is the largest standard option, giving you exceptional flexibility to shorten the 225 mm nominal stroke during setup.
For a direct replacement, match an AirTAC SCJ63 cylinder with a 225 mm nominal stroke, a 75 mm adjust range, PT ports, and the same basic mount. If your application involves significant side loading on the 20 mm rod at this 225 mm extension, consider adding an external guide rail or switching to a guided cylinder to prevent rod bending and premature seal wear. When a fixed stroke is sufficient, the standard SC63 series offers a simpler, non-adjustable alternative.
Adjustable-stroke checklist
At 0.5 MPa, it generates 1559 N of push force and 1402 N of pull force. The push force increases to 2805 N at the maximum operating pressure of 0.9 MPa. Because it is a single-rod cylinder, the push force is always greater than the pull force due to the area of the 20 mm rod.
Yes, if you need field adjustability. The SCJ63X225-75 shares the same bore, port size (PT1/4), and rod thread (M16x1.5) as a fixed-stroke SC63. The body length is slightly longer to accommodate the adjusting screw mechanism. Ensure the 75 mm adjustment range suits your stroke requirement, and match the mounting type and magnet option for a direct fit.
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