The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X275-75S 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, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X275-75S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the 275mm nominal stroke down by up to 75mm without swapping the unit. Its 16mm diameter piston rod and M12x1.25 rod thread handle push forces of 628N at 0.5MPa, making it a solid choice for mid-range automation tasks.
This model includes a built-in magnet, so you can directly mount CMSG/DMSG/EMSG reed or solid-state sensors on the tie-rod barrel for precise end-of-stroke detection. The rear adjusting screw sets the retract stop position, which is ideal for commissioning trials, format changeovers, or taking up mechanical wear over time.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X275-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 275 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. |
| ×275 | 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.
Fine-tune the retract position during initial machine setup without needing to order multiple fixed-stroke cylinders or machine custom stops.
Dial in the stroke end to compensate for gradual wear on gripper pads, cutting tools, or contact surfaces, maintaining consistent part engagement.
Quickly adjust the cylinder stroke for different product sizes on a packaging or assembly line, reducing downtime between batches.
Step up to the SCJ50 series if you need more force—the 50mm bore delivers 982N of push at 0.5MPa. For applications where the stroke never needs field adjustment, a fixed-stroke SC40 cylinder is a simpler, more cost-effective alternative. To replace this unit, match the 40mm bore, 275mm nominal stroke, 75mm adjustment range, PT port thread, and the built-in magnet option exactly with another AirTAC SCJ. At 275mm, rod buckling is not a major concern under axial loads, but always align the load to prevent side-loading.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 40mm bore cylinder generates 628N of push force and 528N of pull force. The maximum push force at 0.9 MPa is 1130N.
Yes, if you need the ability to adjust the stroke end. The SCJ40X275-75S has the same bore, port size (PT1/4), and mounting footprint as a standard SC40, but its body is slightly longer to house the rear adjusting screw. Ensure the 75mm adjustment range fits your application.
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