The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X300-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø32mm bore, 300mm nominal stroke, PT1/8 ports and adjustable end cushioning.
The SCJ32X300-40S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the piston stop point by up to 40 mm without changing the cylinder or adding external hard stops. Its 12 mm diameter rod generates 402 N of push force at 0.5 MPa, while the pull force is 345 N due to the rod area, making it suitable for light-duty positioning and clamping tasks where the final stroke length needs on-machine optimisation.
This genuine AirTAC SCJ model features a built-in magnet (-S suffix) so that CMSG, DMSG, or EMSG solid-state sensors can be clamped directly onto the tie-rod barrel for reliable end-of-stroke or mid-stroke position feedback. The body length A is 182 mm, and the adjustable air cushion decelerates the piston smoothly at both ends, protecting the end caps during high-cycle operation.
| Model | Airtac SCJ32 Standard Cylinder SCJ32X300-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 40 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. |
| ×300 | Nominal (maximum) stroke length in mm. |
| -40 | 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 40 mm adjustment screw allows technicians to precisely set the final stroke position during machine commissioning without swapping shims or cutting rods, speeding up line start-ups.
Used as an adjustable end-stop for ejectors on packaging lines, the stroke can be fine-tuned to accommodate different product sizes, with the built-in magnet confirming the retracted position.
In light clamping fixtures, the adjustable stroke compensates for pad wear or material thickness variations over time, maintaining consistent clamping force without reprogramming the PLC.
Choose the SCJ32 when your application requires a compact, light-force cylinder with a stroke that can be dialled in on-site. If you need more push force, stepping up to the 40 mm bore SCJ40 delivers 628 N at the same 0.5 MPa pressure. For applications where the stroke is fixed and will never need adjustment, the standard SC32 fixed-stroke cylinder is a simpler, cost-effective alternative. This SCJ32X300-40S is a direct replacement for any AirTAC SCJ32X300-40S with a PT port and basic mounting; ensure the 40 mm adjustment range matches your machine's requirement. For strokes of 300 mm, be mindful of side-loading on the 12 mm rod—if the load is not guided externally, consider adding a linear guide or switching to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
A rear-cap adjusting screw limits the piston's stroke end. You can shorten the nominal 300 mm stroke by up to 40 mm in the field, giving an effective stroke range of 260-300 mm. It does not adjust the cylinder's force or speed.
At the standard operating pressure of 0.5 MPa, the push force is 402 N and the pull force is 345 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 804 N.
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