The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X125-50S 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. Ø32mm bore, 125mm nominal stroke, PT1/8 ports and adjustable end cushioning.
The SCJ32X125-50S is a double-acting, single-rod tie-rod cylinder with a rear adjusting screw that provides a 50 mm field-adjustable stroke-end range, letting you fine-tune the 125 mm nominal stroke without swapping the unit. Its 12 mm rod and PT1/8 ports deliver 402 N of push force at 0.5 MPa, suiting light-duty positioning and end-stop calibration tasks.
A built-in magnet (suffix -S) allows CMSG/DMSG/EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing, while the TPU seal and PT threads keep it compatible with standard filtered-air systems. The body length A(SCJ) is 182 mm, and the adjustable air cushion helps decelerate the piston smoothly at stroke end.
| Model | Airtac SCJ32 Standard Cylinder SCJ32X125-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 125 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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 1000 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 | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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. |
|---|---|
| 32 | Bore size in mm. |
| ×125 | 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 lets technicians fine-tune the end position during machine setup without cutting brackets or adding external hard stops, speeding up line start-up.
In light clamping or pressing fixtures, the adjustable stroke compensates for pad wear over time, maintaining consistent clamp force without reprogramming the controller.
Adjust the stroke end to precisely match the diverter gate position for different product sizes on a conveyor, using the built-in magnet for gate-open confirmation.
Choose the SCJ32X125-50S when you need to dial in a precise stroke end during commissioning or format changes on a compact machine. If 402 N of push force is marginal, stepping up to the 40 mm bore (628 N push at 0.5 MPa) adds capacity without a large footprint increase. For applications where the stroke never needs adjustment, the fixed-stroke SC32X125-S offers a simpler, cost-effective alternative.
As a direct replacement, match another AirTAC SCJ32 cylinder with a 125 mm nominal stroke, 50 mm adjust range, PT ports, basic mounting, and the -S magnet. At 125 mm stroke, rod bending is not a primary concern for this bore, but ensure the load is guided if side forces are present.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder provides 402 N of push force and 345 N of pull force (the difference is due to the single 12 mm rod). The maximum push force at the 0.9 MPa operating limit is 724 N.
The rear-cap adjusting screw sets the stroke end position within a 50 mm range; it is not a speed or force regulator. Turn the screw to shorten the stroke from the nominal 125 mm maximum. For speed control, use an external flow control valve.
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