The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X450-10 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, 450mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X450-10 is a double-acting, single-rod pneumatic cylinder from AirTAC, featuring a rear-cap adjusting screw that provides up to 10 mm of field-adjustable stroke end position. With a 40 mm bore and a 450 mm nominal stroke, it delivers 628 N of push force at 0.5 MPa, making it a practical choice for applications requiring fine end-stop tuning during commissioning or format changes.
This model uses a 16 mm diameter piston rod and a PT1/4 port, with an adjustable air cushion for smooth deceleration. The body length A(SCJ) is 185 mm, slightly longer than the fixed-stroke SC version to accommodate the adjusting mechanism. It operates on filtered air from 0.15 to 1.0 MPa across a temperature range of -20 to +70 °C.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X450-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 450 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. |
| ×450 | 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.
During machine setup, the 10 mm adjusting screw allows technicians to dial in the exact stroke end position for a 40 mm bore actuator, compensating for minor assembly variations without mechanical rework.
In packaging lines, the adjustable stroke enables quick repositioning of a stop gate or pusher for different product sizes, reducing downtime between batch runs with a simple screw adjustment.
For a clamping station, the 10 mm adjustment range can be used to compensate for gradual wear on contact pads, maintaining consistent clamping force and position over the tooling's service life.
Choose the SCJ40X450-10 when you need to fine-tune the stroke end position by up to 10 mm without replacing the cylinder or adding external hard stops. If you require more push force, stepping up to a 50 mm bore provides 982 N of push at 0.5 MPa. For applications where the stroke is fixed and never needs adjustment, the standard SC series offers a more compact and cost-effective solution.
This cylinder is a direct replacement for another AirTAC SCJ40X450-10 with PT ports and basic mounting. For strokes of 450 mm, consider the potential for rod bending under side loads; an external guide rail or switching to a guided cylinder assembly is recommended if the load is not perfectly axial. The SCJ mounting subset includes FA front flange, LB foot, and TC centre trunnion options.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. The pull force is lower because the 16 mm piston rod reduces the effective area on the return stroke. The maximum push force at 0.9 MPa is 1130 N.
Yes, the SCJ40X450-10 is dimensionally compatible with the SC series for the same bore and stroke, but the body is slightly longer to house the adjusting screw. Ensure the 10 mm adjustment range does not interfere with your machine's cycle, as the screw sets the stroke end position.
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