The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X25-10STC 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 SCJ63X25-10STC is a double-acting, single-rod pneumatic cylinder with a 10 mm rear stroke-end adjustment, allowing precise fine-tuning of the 25 mm nominal stroke on the machine. With a 63 mm bore, it delivers 1559 N of push force at 0.5 MPa, making it a strong performer for short-stroke positioning tasks. The built-in magnet enables direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
This model features a centre trunnion (TC) mount, supplied with the TCM1 bracket (F-SC63TC), which is ideal for applications where the cylinder body needs to pivot. The 20 mm piston rod and PT1/4 ports are standard for this bore, and the adjustable air cushion provides smooth deceleration over a 28 mm length. The body length A is 197 mm, providing a compact yet powerful solution for confined spaces.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X25-10STC |
|---|---|
| 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.
Fine-tune the retract end position during machine commissioning to perfectly align with a fixture or workpiece without reprogramming the controller.
Apply a precise 1559 N clamping force at 0.5 MPa, with the 10 mm adjust screw allowing for quick compensation of varying part thicknesses in a welding jig.
The TC mount allows the cylinder body to swing, making it suitable for actuating a diverter gate on a conveyor line, with the adjustable stroke setting the exact gate angle.
Select the SCJ63X25-10STC when you need a short, adjustable stroke with pivoting mounting and sensor feedback. If more force is required, consider stepping up to the 80 mm bore (2513 N push at 0.5 MPa); for a lighter, more compact solution, the 50 mm bore (982 N push) may suffice. This model is the correct replacement for another AirTAC SCJ63 cylinder with a 25 mm nominal stroke, 10 mm adjust range, PT ports, centre trunnion mount, and a magnet.
For applications requiring a fixed, non-adjustable stroke, the standard SC63 cylinder is a simpler alternative. The centre trunnion mount is designed to handle pivoting loads, but ensure the trunnion pins are aligned correctly to avoid binding. The 10 mm adjustment range is perfect for taking up minor mechanical tolerances or wear during commissioning.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the push force is 1559 N. The pull force on the return stroke is 1402 N due to the area of the 20 mm piston rod. The maximum push force at 0.9 MPa is 2805 N.
A screw on the rear cap adjusts the stroke end position, shortening the effective stroke by up to 10 mm from the nominal 25 mm. This is a mechanical stop for the piston, not a speed or force control. It allows you to dial in the exact stroke length needed on the machine without changing the cylinder.
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