The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X160-75S 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, 160mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X160-75S is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly in your hands. Its rear-cap adjusting screw provides a generous 75 mm of adjustment range, letting you dial in the exact stroke position from 85 mm up to the full 160 mm nominal length without dismounting the cylinder. With a 16 mm diameter piston rod and PT1/4 ports, this 40 mm bore actuator delivers 628 N of push force at a standard 0.5 MPa supply, scaling up to 1130 N at 0.9 MPa.
This model includes a built-in magnet (-S suffix), so standard CMSG, DMSG, or EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The body length A(SCJ) is 185 mm, and the unit operates on 40 µm filtered air across a -20 to +70 °C range. It is a practical choice for commissioning engineers who need to tweak a stop position to accommodate tooling tolerances or product changeovers on the fly.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X160-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 160 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. |
| ×160 | 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.
The 75 mm adjustment screw lets technicians fine-tune the retract stop position during initial machine bring-up, compensating for stack-up tolerances in welded frames or bolted assemblies without re-machining brackets.
Mounted to a side guide rail, this cylinder's adjustable stroke allows a packaging line to quickly change the lane width for different box sizes, with the -S magnet confirming the guide is in the correct position.
In a woodworking or composites shop, the 75 mm range accommodates varying material stack heights. The operator sets the screw to prevent over-clamping thin panels while still reaching full closure on thicker ones.
Choose this 40 mm bore when your application needs a mid-range force class—its 628 N push at 0.5 MPa sits between the 402 N of a 32 mm bore and the 982 N of a 50 mm bore. The 75 mm adjustment range is ideal for processes where the stroke length must be empirically determined during setup or altered periodically. If your stroke is fixed and never changes, a standard SC40X160 cylinder offers the same force in a slightly more compact envelope. For a direct replacement, match the 40 mm bore, 160 mm nominal stroke, 75 mm adjust range (-75), PT port thread, basic mounting, and the -S magnet option. Since the stroke is 160 mm, rod buckling is not a primary concern at typical shop pressures, but always align the load axially to prevent side-loading the rod bearing.
Adjustable-stroke checklist
Because it is a single-rod cylinder, push and pull forces differ. At 0.5 MPa, it generates 628 N pushing out and 528 N pulling in. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 128 kgf. Always size your load based on the lower pull force if the cylinder does work in both directions.
Physically, yes, the mounting footprints are compatible. The SCJ body is slightly longer to house the adjusting screw. You gain the ability to shorten the stroke end by up to 75 mm. Ensure you order the same port type (PT), and if your existing setup uses sensors, the -S magnet version is the correct match.
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