The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X150-75STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø40mm bore, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X150-75STC is a double-acting, single-rod pneumatic cylinder with a 40 mm bore and a nominal 150 mm stroke, offering a field-adjustable stroke end via a rear-cap screw. This model provides a substantial 75 mm adjustment range, allowing fine-tuning of the piston stop position without removing the cylinder. It generates 628 N of push force at 0.5 MPa, making it a versatile actuator for medium-duty automation tasks.
This specific configuration includes a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors, and a centre trunnion mount (TC) with the TCM1 bracket for pivoting applications. The 16 mm diameter piston rod is threaded M12x1.25, and the cylinder body length (A) is 185 mm. It features a 21 mm air cushion and PT1/4 ports, operating smoothly within a 30-800 mm/s speed range.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X150-75STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 75 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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. |
|---|---|
| 40 | Bore size in mm. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -75 | 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.
Quickly adjust the end-stop for different product sizes on packaging or sorting lines without mechanical modifications, using the 75 mm adjustment range.
Fine-tune the actuator stroke during machine commissioning to perfectly match the tooling or workpiece, eliminating the need for precision-machined hard stops.
Compensate for gradual wear on grippers, clamps, or pressing tools over time by slightly extending the effective stroke with the rear adjusting screw.
Choose the SCJ40 when your application requires a push force around 628 N at standard plant pressure. If you need more force, step up to the 50 mm bore SCJ50, which delivers 982 N of push force. For a fixed-stroke solution without the rear adjuster, the standard SC40 cylinder is a direct alternative. This SCJ40X150-75STC is a direct replacement for any AirTAC SCJ40 with a 150 mm stroke, 75 mm adjust range, PT ports, centre trunnion mount, and magnet sensor.
For this 150 mm stroke, side-loading is generally manageable, but always ensure the load is guided externally if radial forces are present. The centre trunnion mount (F-SC40TC) is ideal for applications where the cylinder body needs to pivot during its stroke, absorbing misalignment and simplifying linkage design.
Adjustable-stroke checklist
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. The push force is higher because the single rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 1280 N.
Yes, if you need the 75 mm stroke-end adjustability. The SCJ40 shares the same mounting dimensions and port sizes as the SC40. Ensure your replacement matches the 150 mm nominal stroke, PT1/4 ports, and that you have the F-SC40TC trunnion bracket. The SCJ body is slightly longer to accommodate the adjusting screw mechanism.
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