The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X150-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø40mm bore, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X150-40S is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 40 mm of field-adjustable stroke reduction. With a 40 mm bore and 16 mm rod, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it a practical choice for mid-range positioning tasks.
The built-in magnet (-S suffix) allows direct mounting of CMSG/DMSG/EMSG sensors along the tie-rod barrel for reliable end-of-stroke detection. Its PT1/4 ports and 21 mm air cushion ensure smooth deceleration, while the 185 mm body length (A dimension) keeps the footprint compact for integration into machinery.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X150-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 40 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. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -40 | 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 40 mm adjustment screw lets technicians dial in the exact stroke end position without swapping cylinders or machining external hard stops.
On packaging lines, quickly reset the stroke end to accommodate different box sizes or pallet patterns, minimizing downtime between production runs.
In clamping or pressing fixtures, the adjustable stroke can be extended over time to compensate for jaw or pad wear, maintaining consistent clamping force.
Step up to the SCJ50 bore for 982 N of push force at 0.5 MPa if the 628 N from this 40 mm bore is marginal. For applications where the stroke never needs field adjustment, a fixed-stroke SC40X150 cylinder offers the same force in a slightly shorter body. To replace this unit, match the 40 mm bore, 150 mm nominal stroke, 40 mm adjust range, PT ports, basic mounting, and the -S magnet option to maintain sensor compatibility.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. The maximum push force at the 0.9 MPa operating limit is 1130 N. The pull force is lower due to the 16 mm piston rod area.
No. The SCJ cylinder does not lock or hold its position when air pressure is lost or the valve is centered. The adjusting screw only sets the stroke end point. If a load must be held without live pressure, you need an external rod brake or a pilot-operated check valve.
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