The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X25-20STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø32mm bore, 25mm nominal stroke, PT1/8 ports and adjustable end cushioning.
The SCJ32X25-20STC is a compact double-acting, single-rod pneumatic cylinder that puts fine stroke tuning directly in the rear cap. Its 20 mm adjusting screw lets you dial in the exact stroke end position without removing the cylinder or adding external hard stops, making it invaluable during commissioning and for format changeovers on small-bore tooling. With a 12 mm rod and PT1/8 ports, it delivers 402 N of push force at 0.5 MPa.
This model comes factory-equipped with a built-in magnet (-S) for direct mounting of CMSG/DMSG sensors, and a centre trunnion (TC) pivot mount, supplied with the TCM1 bracket, allowing the cylinder to swing through an arc. The body length A(SCJ) is 182 mm, providing a slightly longer envelope than the fixed-stroke SC32 to house the adjustment mechanism.
| Model | Airtac SCJ32 Standard Cylinder SCJ32X25-20STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 25 mm |
| Stroke adjustment | Up to 20 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. |
| ×25 | Nominal (maximum) stroke length in mm. |
| -20 | 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 20 mm rear adjustment screw allows engineers to precisely dial in the cylinder's end stop during initial machine setup without swapping out hard stops or shims, saving significant commissioning time.
Ideal for actuating gates or diverters on compact conveyors where the pivot action of the TC mount is required and the stroke end position may need tweaking for different product sizes.
Use the adjustable stroke to set a precise, repeatable clamp or staking depth on a small assembly fixture. The built-in magnet provides end-of-stroke confirmation via a reed switch.
Choose the SCJ32 when your application requires a 32 mm bore with the ability to fine-tune the stroke end by up to 20 mm. If you need more force, stepping up to the SCJ40 provides 628 N of push at 0.5 MPa. For applications where the stroke is permanently fixed and never needs field adjustment, the standard SC32 fixed-stroke cylinder is a more economical choice. This model is a direct replacement for an AirTAC SCJ32X25-20 with a TC centre trunnion mount, magnet, and PT threads.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 32 mm bore cylinder generates 402 N of push force and 345 N of pull force. The maximum push force at 0.9 MPa is 724 N.
Yes, provided the mounting style and port threads match. The SCJ32 has the same bore, rod, and port size as the SC32 but features a longer body (A=182 mm) to accommodate the rear adjusting screw. Ensure you have the extra space for the longer body length.
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