The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X225-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø63mm bore, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X225-100 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, providing a 100 mm fine-tuning range via the rear-cap screw. With a 63 mm bore, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it a powerful solution for applications where the stroke length must be dialled in precisely during commissioning or changeover without swapping the cylinder.
This model has a 20 mm diameter rod with an M16x1.5 thread and PT1/4 ports. The body length A for this SCJ series is 197 mm, and it features a 28 mm air cushion for smooth deceleration. The nominal 225 mm stroke is well within the 1500 mm maximum standard stroke for this bore, and the 100 mm adjustment range is the largest available, offering maximum flexibility for end-position tuning.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X225-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 100 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. |
| -100 | 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 100 mm adjustment range allows engineers to precisely match the stroke to a machine's exact mechanical limits during initial setup, eliminating the need to stock multiple fixed-stroke cylinders for trial-and-error fitting.
Ideal for packaging lines with multiple product sizes. The stroke can be quickly re-adjusted to accommodate different box heights or pallet sizes, reducing downtime between production runs.
In clamping or pressing applications, the adjustable stroke can be periodically extended to compensate for the wear of tooling, gripper pads, or the workpiece itself, maintaining consistent clamping force over time.
Choose the SCJ63X225-100 when you need to fine-tune the end-of-stroke position by up to 100 mm on a 63 mm bore platform. If 1559 N of push force is insufficient, stepping up to an 80 mm bore provides 2513 N. For applications requiring a fixed, non-adjustable stroke, the standard SC63 series is a more economical choice. This cylinder is a direct replacement for another AirTAC SCJ63X225-100 with the same PT ports and basic mounting.
For this 225 mm stroke length, ensure the load is guided to prevent excessive side-loading and rod bending. If external guides are not feasible, consider a guided cylinder or adding an external linear rail to protect the rod bearings and seals.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the cylinder produces a push force of 1559 N and a pull force of 1402 N. The maximum push force at the 1.0 MPa operating limit is 2805 N. The pull force is lower due to the area of the 20 mm piston rod.
The rear-cap adjusting screw mechanically limits the piston's retraction stroke end. You can shorten the effective stroke from the nominal 225 mm down to 125 mm in the field. Unlike a fixed-stroke SC cylinder, this allows for on-machine tuning without dismounting the cylinder or swapping it for a different model.
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