The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X40-10S 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, 40mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X40-10S is a 40 mm bore, single-rod double-acting cylinder that delivers 628 N of push force at 0.5 MPa, with a 16 mm diameter piston rod. Its defining feature is the rear-cap adjusting screw, which provides up to 10 mm of field-adjustable stroke-end reduction, allowing precise fine-tuning of the piston's stopping point without replacing the cylinder.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for reliable end-of-stroke or mid-stroke position sensing. The standard TPU seals and PT ports make it a durable, ready-to-install unit for general industrial applications.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X40-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 40 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. |
| ×40 | 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.
Fine-tune the actuator's end-stop during initial machine commissioning. The 10 mm adjustment screw allows technicians to dial in the exact stroke length needed after installation, compensating for minor assembly tolerances.
Adjust the stopping position of a diverter gate or product stop on a conveyor line. As products change or wear occurs, the stroke end can be quickly re-adjusted to maintain precise alignment without disassembling the mechanism.
With the built-in magnet, mount a DMSG sensor to confirm the adjusted stroke end has been reached. This is ideal for small clamping or pressing fixtures where the final position must be verified on every cycle.
Choose the SCJ40 when you need the 40 mm bore's force class (628 N push at 0.5 MPa) and the ability to fine-tune the stroke end on the machine. If your application requires more force, stepping up to the 50 mm bore (SCJ50) provides 982 N of push force. For applications where the stroke is fixed and never needs adjustment, the standard SC40 fixed-stroke cylinder is a more economical choice. This SCJ40X40-10S is a direct replacement for an identical AirTAC SCJ adjustable-stroke cylinder with a 40 mm bore, a 40 mm nominal stroke, a 10 mm adjustment range, PT ports, and a built-in magnet.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this cylinder provides 628 N of push force and 528 N of pull force. The push force is greater because the single piston rod reduces the effective area on the return stroke.
A screw mechanism in the rear cap allows you to shorten the stroke end by up to 10 mm. The 40 mm stroke in the model code is the nominal maximum. The screw only adjusts the end position; it does not change the cylinder's force or speed.
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