The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X75-50SH 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, 75mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X75-50SH is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, offering a 50 mm adjustment range via a rear-cap screw. With a 63 mm bore, it delivers 1559 N of push force at 0.5 MPa and up to 2805 N at 0.9 MPa, making it a robust choice for applications requiring precise end-position tuning without cylinder replacement.
This model is built with a 20 mm diameter piston rod and features a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors. The 'H' suffix specifies a Viton (FKM) seal, extending the operating temperature range to 0–150 °C for high-heat environments. The adjustable cushion is 28 mm long, and the body length (A) is 197 mm, providing a compact yet powerful solution for format changes and commissioning fine-tuning.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X75-50SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 75 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. |
| ×75 | 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.
The 50 mm adjustment screw allows engineers to quickly fine-tune the end-of-stroke position during initial machine setup without needing to swap out the cylinder or fabricate custom stops.
On packaging or sorting lines, the stroke can be rapidly adjusted to accommodate different product sizes, significantly reducing downtime between production runs.
In clamping or pressing applications, the adjustable stroke can be used to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent process force and position.
Choose the SCJ63X75-50SH when you need to dial in a precise stroke end point on a machine, eliminating the need for external hard stops. If 1559 N of force at 0.5 MPa is insufficient, stepping up to an 80 mm bore provides 2513 N. For applications where the stroke is fixed and never needs adjustment, a standard SC63X75 cylinder is a more economical choice.
This cylinder is a direct replacement for another AirTAC SCJ63 adjustable-stroke unit with a 75 mm nominal stroke and a 50 mm adjustment range, using PT ports and a basic mount. The integrated magnet allows for seamless sensor feedback integration. For strokes of this length, ensure the rod is not subjected to high side loads; if lateral forces are present, an external guide rail should be used.
Adjustable-stroke checklist
The theoretical push force at 0.5 MPa is 1559 N, and the pull force on the rod-retract stroke is 1402 N. At the maximum operating pressure of 1.0 MPa, the push force reaches 3118 N.
A rear-cap screw physically limits the piston's stroke end within a 50 mm range from the nominal 75 mm stroke. It is a mechanical end-stop adjustment, not a position-locking device. The cylinder will not hold its position if air pressure is lost; an external pilot-operated check valve is required for load holding.
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