The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X75-10 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø40mm bore, 75mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X75-10 is a double-acting, single-rod pneumatic cylinder that delivers 628 N of push force at 0.5 MPa, making it a capable actuator for medium-duty positioning tasks. Its defining feature is a rear-cap adjusting screw that provides up to 10 mm of field-adjustable stroke reduction, allowing engineers to fine-tune the end position without swapping the cylinder or adding external hard stops.
Built on the proven SC tie-rod platform, this 40 mm bore unit uses a 16 mm diameter piston rod and PT1/4 ports. The adjustable stroke end is purely mechanical, shortening the 75 mm nominal stroke by up to 10 mm, which is ideal for commissioning adjustments and taking up mechanical wear over time.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X75-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 75 mm |
| Stroke adjustment | Up to 10 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. |
| ×75 | Nominal (maximum) stroke length in mm. |
| -10 | 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 10 mm adjustment screw lets technicians fine-tune the cylinder's end stop on a new machine during initial runoff, eliminating the need to machine custom spacers or reposition sensors.
In clamping or pressing fixtures, the adjustable stroke can be periodically shortened to compensate for pad wear or workpiece tolerance drift, maintaining consistent clamping force without replacing the actuator.
The 40 mm bore provides ample force for diverting small packages on a conveyor. The adjustable stroke allows a single cylinder model to be tuned for different lane widths or product sizes.
Choose the SCJ40X75-10 when you need to dial in a precise stroke end position during setup or changeover. If the 628 N push force at 0.5 MPa is insufficient, stepping up to a 50 mm bore (SCJ50) raises push force to 982 N. For applications requiring a fixed, non-adjustable stroke, the standard SC40 series offers a simpler, lower-cost alternative. A direct replacement must match the 40 mm bore, 75 mm nominal stroke, 10 mm adjust range, PT port thread, and basic mounting configuration.
Adjustable-stroke checklist
At 0.5 MPa, it generates 628 N pushing and 528 N pulling. The maximum push force at the 0.9 MPa operating limit is 1130 N. The pull force is lower because the 16 mm rod reduces the effective piston area on the return stroke.
Yes, if you need the adjustable stroke feature. The SCJ40X75-10 shares the same mounting footprint and port size as an SC40. Ensure the 10 mm adjustment range suits your process, and note that the SCJ body length is slightly longer than the fixed-stroke SC due to the rear adjusting mechanism.
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