The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X75-10S 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 SCJ40X75-10S is a 40 mm bore double-acting single-rod cylinder with a rear adjusting screw, letting you fine-tune the stroke end by up to 10 mm without swapping the unit. Its 16 mm diameter piston rod delivers 628 N of push force at 0.5 MPa, making it a solid fit for light pressing, clamping, and ejection tasks where the final position needs dialling in during commissioning.
A built-in magnet allows CMSG/DMSG/EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The cylinder body measures 185 mm long in its basic configuration, and the adjustable air cushion helps decelerate the piston smoothly within its 21 mm cushion zone. This model uses PT1/4 ports and an M12x1.25 rod thread as standard.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X75-10S |
|---|---|
| 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.
Dial in the exact end position during machine build without cutting or shimming. The 10 mm screw adjustment lets technicians compensate for stack-up tolerances in welded frames or fabricated brackets.
Use the 628 N push force for pressing bushings or connectors. The adjustable stroke prevents over-travel, protecting delicate parts from impact damage when the tooling is changed.
Fine-tune the stopping position of a diverter gate on a conveyor line. The magnet-equipped barrel sends a clean signal to the PLC the moment the gate reaches its adjusted home position.
This 40 mm bore adjustable-stroke cylinder sits between the smaller SCJ32 (402 N push at 0.5 MPa) and the larger SCJ50 (982 N push). If your load is borderline, stepping up to the 50 mm bore nearly doubles the available force. Choose the SCJ when you need to tweak the stroke end on the machine; if your stroke is fixed and you want a simpler, slightly shorter body, the fixed-stroke SC series is the better pick. For direct drop-in replacement, match the 40 mm bore, 75 mm nominal stroke, 10 mm adjust range, PT ports, and the -S magnet option. The basic mount means no bracket is included, so you will need to order FA, LB, or TC mounting hardware separately if required.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this cylinder generates 628 N pushing and 528 N pulling. The push force is higher because the single rod reduces the piston area on the return side. Maximum operating pressure is 1.0 MPa.
Yes, the mounting footprint and port positions are identical, but the SCJ body is slightly longer to house the adjusting screw. Ensure your machine has clearance for the 185 mm body length and confirm the 10 mm adjustment range covers your stroke-trimming needs.
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