The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X150-75 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, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X150-75 is a double-acting, single-rod pneumatic cylinder with a 63 mm bore and a nominal 150 mm stroke. Its defining feature is a rear-cap adjusting screw that provides a 75 mm range for fine-tuning the stroke end position, allowing machine builders to dial in the exact stopping point without swapping the cylinder. At 0.5 MPa, it delivers 1559 N of push force and 1402 N of pull force, driven by a 20 mm diameter piston rod.
This adjustable-stroke model shares the same robust tie-rod construction as the fixed-stroke SC series but adds a 197 mm body length for the SCJ variant. The integrated air cushion, with a 28 mm cushion length, decelerates the piston smoothly at the end of travel, protecting the end cap. The standard PT1/4 port and M16x1.5 rod thread make it a direct fit for many industrial automation tasks.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X150-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 150 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. |
| ×150 | 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.
The 75 mm adjustment range lets technicians fine-tune the actuator's end-stop on a new assembly line without needing a collection of different stroke cylinders, speeding up the final setup phase.
In clamping or pressing fixtures, the stroke can be incrementally extended over the machine's life to compensate for wear on tooling or contact surfaces, maintaining consistent clamping force.
For a packaging line that handles multiple box sizes, the adjustable screw allows operators to quickly change the pusher stroke to match a new product format, minimizing downtime between batches.
Choose the SCJ63X150-75 when your application requires a 63 mm bore force class but the final stroke length needs on-machine adjustment, such as during commissioning or for format changeovers. If the 1559 N push force at 0.5 MPa is insufficient, stepping up to an 80 mm bore provides 2513 N of push force. If a fixed, non-adjustable stroke is acceptable, the standard SC63X150 is a simpler alternative. For a direct replacement, match the 63 mm bore, 150 mm nominal stroke, 75 mm adjust range, PT port thread, and basic mounting. For strokes of 150 mm, side-loading is typically not a primary concern, but always ensure the load is guided to prevent rod bending.
Adjustable-stroke checklist
The push force is 1559 N at 0.5 MPa and 2805 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the single rod, providing 1402 N at 0.5 MPa.
Yes, if you need the adjustable stroke feature. The SCJ63X150-75 has the same bore, rod size, and port thread as an SC63. However, the body length is slightly longer at 197 mm to accommodate the adjusting screw. Ensure you have the extra space for installation.
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