The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X150-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø40mm bore, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X150-50S provides a nominal 150 mm stroke with a 50 mm rear adjustment range, letting you dial in the exact stroke end on the machine. With a 16 mm piston rod and PT1/4 ports, it delivers 628 N of push force at 0.5 MPa, scaling up to 1130 N at 0.9 MPa.
A built-in magnet is included, so CMSG/DMSG/EMSG sensors clip directly onto the tie-rod barrel for reliable end-of-stroke sensing. The adjustable cushion and 185 mm body length make it a compact, field-tunable solution for mid-force pneumatic tasks.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X150-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 50 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. |
| -50 | 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 stroke end during machine setup without swapping cylinders or machining custom stops, saving hours of mechanical work.
Quickly adjust the pusher stroke for different box sizes on a packaging line by turning the rear screw, no tools required.
Compensate for gripper jaw wear over time by slightly extending the stroke end, maintaining consistent clamping without replacing parts.
Choose the SCJ40 when you need to fine-tune the stroke end during commissioning or changeovers, without adding external hard stops. If you require a fixed, repeatable stroke with no adjustment, the standard SC40 is a simpler alternative. For higher force, the SCJ50 delivers 982 N push at 0.5 MPa. To replace this unit, match the 40 mm bore, 150 mm nominal stroke, 50 mm adjust range, PT ports, basic mount, and the integrated magnet (-S). For strokes over 300 mm in this bore, consider an external guide to protect the 16 mm rod from side loads.
Adjustable-stroke checklist
At 0.5 MPa, it provides 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 push at 0.9 MPa is 1130 N.
Yes, if you need the 50 mm field-adjustable range. It shares the same bore, rod, and porting as the SC40. Ensure the 150 mm nominal stroke and PT threads match, and note the SCJ body is slightly longer to house the adjusting screw.
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