The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X175-75S 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, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X175-75S is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly in your hands. Its rear-cap adjusting screw provides a full 75 mm of adjustment range, letting you dial in the exact 175 mm nominal stroke your application demands without swapping cylinders or adding external hard stops. With a 20 mm diameter piston rod and a push force of 1559 N at 0.5 MPa (rising to 2805 N at the maximum 0.9 MPa operating pressure), it delivers the authoritative thrust expected from a 63 mm bore tie-rod cylinder.
This model includes a built-in magnet, so standard CMSG, DMSG, or EMSG sensors clamp directly onto the barrel for reliable, non-contact position sensing. The body length A(SCJ) is 197 mm, and the integrated air cushion, with a 28 mm cushion length, decelerates the piston smoothly at each end of travel. It is a genuine AirTAC component, ready to provide repeatable, field-configurable motion control.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X175-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 175 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. |
| ×175 | 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.
During machine commissioning, the 75 mm adjustment screw allows engineers to precisely set the stroke end position without re-machining mounts or ordering multiple fixed-stroke cylinders, saving hours of setup time.
In a clamping fixture, the adjustable stroke lets an operator fine-tune the final clamp position to accommodate varying workpiece thicknesses, ensuring consistent clamping force without damaging parts.
For a conveyor diverter gate, the stroke can be adjusted to perfectly align the gate with different product lanes. The built-in magnet provides end-of-stroke confirmation to the PLC, ensuring reliable sorting.
Choose the SCJ63 bore when your load requires the 1559 N push force at standard shop air. If you need a more compact unit and can accept less force, step down to the 50 mm bore, which provides 982 N of push at 0.5 MPa. For higher force requirements, the 80 mm bore offers a substantial jump to 2513 N. The SCJ is the right choice when you need to fine-tune the stroke end position during commissioning, for format changes, or to compensate for wear. If your stroke is fixed and will never need adjustment, the standard SC series is a simpler, cost-effective alternative. For strokes of 300 mm or more, evaluate side-loading on the rod; an external guide rail or a guided cylinder is recommended to prevent rod bending and ensure long seal life. This SCJ63X175-75S directly replaces any AirTAC SCJ63 cylinder with a 175 mm nominal stroke, 75 mm adjustment range, and PT ports.
Adjustable-stroke checklist
A screw in the rear end-cap acts as an internal stop for the piston. By turning the screw, you can shorten the stroke end position by up to 75 mm. The 175 mm in the model code is the maximum nominal stroke; the screw allows you to reduce it anywhere within that 75 mm range. It does not adjust the cylinder's force or speed.
At the standard operating pressure of 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. Pull force is always lower due to the area of the 20 mm piston rod.
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