The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X225-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø63mm bore, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X225-50 is a double-acting, single-rod pneumatic cylinder that puts a 50 mm stroke-end adjustment at your fingertips, eliminating the need to swap barrels or add external hard stops during commissioning. With a 63 mm bore delivering 1559 N of push force at 0.5 MPa and a 20 mm piston rod, it handles moderate clamping, pressing, and positioning tasks where fine-tuning the retract or extend end point saves significant downtime.
The rear-cap adjusting screw lets you shorten the nominal 225 mm stroke by up to 50 mm in the field, giving you a true adjustable range of 175–225 mm. The cylinder body length A is 197 mm, and it features a 28 mm air cushion on both ends to decelerate the piston quietly. Standard PT1/4 ports and an M16x1.5 rod thread keep integration simple with common pneumatic fittings.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X225-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 50 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. |
| -50 | 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 end-of-stroke position on new automation cells without machining custom stops. The 50 mm adjustment range allows engineers to dial in the exact stroke needed after the machine is powered up, accelerating the debug phase.
In high-cycle clamping fixtures, mechanical components can wear over time, changing the clamp point. The rear adjusting screw provides 50 mm of take-up to restore the original clamping force and position without replacing the cylinder.
On packaging lines handling multiple product sizes, the adjustable stroke lets operators quickly reset a pusher or diverter's travel distance. The 50 mm range accommodates different box or carton formats with a simple screw adjustment.
Choose the SCJ63 when you need the 1559 N push force of a 63 mm bore but also require field-adjustable stroke end positions. If your application demands higher force, stepping up to an 80 mm bore provides 2513 N of push at 0.5 MPa; for a lighter, more compact solution, the 50 mm bore offers 982 N. If your stroke is fixed and never needs adjustment, a standard SC63 fixed-stroke cylinder is a more economical choice. For a direct replacement, match the 63 mm bore, 225 mm nominal stroke, 50 mm adjust range, PT port thread, and basic mounting style. At a 225 mm stroke, side-loading is typically minimal, but if the rod is subjected to radial forces, consider adding an external linear guide or switching to a guided cylinder to protect the rod bearing.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N. Because it is a single-rod cylinder, the push force is always greater than the pull force due to the rod area on the piston.
Yes, provided the mounting footprint, port size (PT1/4), and rod thread (M16x1.5) match. The SCJ63X225-50 replaces a fixed-stroke SC63 with a nominal stroke between 175 mm and 225 mm, giving you the added benefit of a 50 mm field-adjustable range. Ensure your machine has clearance for the slightly longer body length A of 197 mm.
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