The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X225-75 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, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X225-75 delivers a nominal 225 mm stroke with a 75 mm field-adjustable range via the rear-cap screw, letting you dial in the exact stroke end during commissioning or format changes. Its 40 mm bore produces 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa), driven by a 16 mm piston rod through PT1/4 ports.
At 185 mm body length (A dimension), this tie-rod cylinder is slightly longer than a fixed-stroke SC of the same bore to house the adjusting mechanism. The adjustable cushion decelerates the piston smoothly, and the single-rod design means pull force is lower (528 N at 0.5 MPa) due to the rod area. Standard TPU seals suit -20 to +70 °C operation.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X225-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 225 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. |
| ×225 | 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.
Dial in the exact 225 mm stroke end during machine commissioning. The 75 mm rear screw adjustment lets technicians fine-tune the stop position without dismounting the cylinder or fabricating custom hard stops.
Adjust the stroke on the fly when switching between product sizes on a packaging or assembly line. The SCJ40X225-75's 628 N push force handles medium-duty pusher and diverter tasks with quick, tool-free stroke changes.
Take up mechanical wear in end-of-arm tooling or mating components by advancing the stroke end. The 75 mm adjustment range provides ample travel to compensate for pad compression or linkage play over time.
Choose the SCJ40X225-75 when you need to fine-tune the stroke end position by up to 75 mm without replacing the cylinder or adding external hard stops. If you require a higher push force, step up to the 50 mm bore (982 N push at 0.5 MPa); for a lighter, more compact solution, the 32 mm bore offers 402 N. If your application does not need stroke adjustability, the fixed-stroke SC series is a simpler, cost-effective alternative.
For a drop-in replacement, match the 40 mm bore, 225 mm nominal stroke, 75 mm adjust range, PT port thread, and basic mounting. The 225 mm stroke is well within the 1200 mm maximum for this bore, but if side loads are present at this extension, consider an external guide rail or a guided cylinder to protect the rod and bearing from bending.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder generates 628 N pushing and 528 N pulling. The pull force is lower because the 16 mm piston rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 1280 N.
A rear-cap adjusting screw limits the piston's forward travel, letting you shorten the stroke end by up to 75 mm from the 225 mm nominal maximum. You can replace a fixed-stroke SC with this SCJ if the bore, port thread, and mounting match, but the SCJ body is slightly longer to accommodate the screw mechanism.
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