The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X500-75S 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, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X500-75S is a 40 mm bore double-acting single-rod cylinder with a rear-cap adjusting screw, giving you up to 75 mm of field-adjustable stroke-end control. This model delivers 628 N of push force at 0.5 MPa and 1130 N at 0.9 MPa, with a 16 mm piston rod and PT1/4 pneumatic ports.
A built-in magnet (the -S suffix) lets you clamp CMSG/DMSG/EMSG reed or solid-state sensors directly onto the tie-rod barrel for reliable end-of-stroke or mid-position sensing. The body length A(SCJ) is 185 mm, and the adjustable air cushion helps decelerate loads smoothly across the 30-800 mm/s speed range.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X500-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 500 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. |
| ×500 | 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.
Dial in the exact stroke end position on a new assembly line without swapping cylinders, using the 75 mm adjustment range to compensate for fixture tolerances during setup.
Quickly adapt a packaging machine's pusher stroke for different box sizes by turning the rear screw, eliminating the need for multiple fixed-stroke cylinders.
Take up mechanical wear in a clamping or pressing tool over time by slightly extending the effective stroke, maintaining consistent contact force without reprogramming a servo axis.
Choose this 40 mm bore when your application needs up to 628 N of push force at standard plant air pressure. If you require more force, stepping up to the SCJ50 series provides 982 N of push at 0.5 MPa. For applications where the stroke never needs field adjustment, a fixed-stroke SC40 cylinder is a simpler, more economical alternative. To replace this unit, match the 40 mm bore, 500 mm nominal stroke, 75 mm adjust range, PT port thread, basic mounting, and the -S magnet option. For a 500 mm stroke, ensure the rod is guided externally or use a guided cylinder if the load applies significant side force, to prevent rod bending.
Adjustable-stroke checklist
The push force is 628 N at 0.5 MPa and 1130 N at the maximum operating pressure of 0.9 MPa. Pull force is lower at 528 N at 0.5 MPa because the 16 mm rod reduces the effective piston area on the retract stroke.
A rear-cap screw sets the stroke end position within a 75 mm range from the 500 mm nominal maximum. Pick the SCJ when you need to fine-tune the stroke on the machine for commissioning, format changes, or wear take-up. Choose a fixed-stroke SC if your stroke length is permanently fixed.
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