The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø50mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X50-30S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, delivering a push force of 982 N at 0.5 MPa. Its rear-cap adjusting screw provides a 30 mm range to fine-tune the stroke end, ideal for commissioning trials and format changeovers without swapping the cylinder. The 50 mm bore uses a 20 mm diameter piston rod and PT1/4 ports.
This model includes a built-in magnet (-S suffix), allowing CMSG/DMSG/EMSG reed or solid-state sensors to be clamped directly onto the tie-rod barrel for precise end-of-stroke position sensing. The body length (A dimension) is 194 mm, and the cylinder operates with filtered air from 0.15 to 1.0 MPa across a standard temperature range of -20 to +70 °C.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 30 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, 21 mm |
| Max stroke | Up to 1200 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -30 | 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.
Engineers can fine-tune the actuator's end position by up to 30 mm during initial machine setup, eliminating the need to shim or reposition the entire cylinder for a perfect fit.
On packaging lines, the adjustable stroke allows operators to quickly reset a pusher or diverter's stopping point when switching between product sizes, reducing downtime significantly.
In clamping or pressing fixtures, the 30 mm adjustment range can be used to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent process force and position.
Select the SCJ50X50-30S when you need a mid-range force actuator with the ability to dial in the stroke end on the machine. If you require more force, stepping up to the 63 mm bore provides 1559 N of push at 0.5 MPa. For a simpler, fixed-stroke solution without the adjustment screw, the standard SC50X50 is the direct alternative. This cylinder is a direct replacement for another AirTAC SCJ50X50-30S with PT ports, a basic mount, and a magnet.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the push force is 982 N and the pull force is 825 N. The maximum push force at 0.9 MPa is 1767 N. Because it is a single-rod cylinder, the push force is always greater than the pull force due to the rod area.
A rear-cap screw lets you shorten the stroke end by up to 30 mm, providing on-machine fine-tuning without disassembling the cylinder. Choose this SCJ model over a fixed-stroke SC when your application requires precise end-position adjustment during setup, for format changes, or to compensate for wear, rather than a single fixed stroke length.
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