The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X500-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø40mm bore, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X500-30S is a double-acting, single-rod pneumatic cylinder featuring a rear-cap adjusting screw that provides up to 30 mm of field-adjustable stroke end. With a 40 mm bore and 16 mm rod, it delivers 628 N of push force at 0.5 MPa, making it a practical choice for applications requiring fine-tuned positioning.
A built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection. The cylinder body length A is 185 mm, and it uses PT1/4 ports with an M12x1.25 rod thread. The adjustable cushion decelerates the piston smoothly, and the stroke can be shortened from its 500 mm nominal maximum without swapping the unit.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X500-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 500 mm |
| Stroke adjustment | Up to 30 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. |
| -30 | 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.
The 30 mm adjustment range lets technicians dial in the exact stroke end on a new machine without fabricating custom stops, speeding up initial setup.
Quickly adapt the cylinder's end position for different product sizes on a packaging line by turning the rear screw, eliminating mechanical stop changes.
Take up mechanical play in a clamping or pressing fixture over time by advancing the stroke end, maintaining consistent applied position without reprogramming.
Step up to a 50 mm bore for 982 N of push force at 0.5 MPa if this 40 mm model is undersized, or down to a 32 mm bore for 402 N in a more compact package. The SCJ is the right choice when you need to dial in the stroke end during commissioning or changeovers; if a fixed stroke is sufficient, the standard SC series offers a simpler, lower-cost alternative.
For direct replacement, match an AirTAC SCJ with a 40 mm bore, 500 mm nominal stroke, a 30 mm adjust range, PT ports, and the -S magnet option. At this 500 mm stroke, ensure the rod is not subjected to high side loads; if lateral forces are present, pair the cylinder with an external linear guide or switch to a guided cylinder to prevent rod bending.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this cylinder produces 628 N of push force and 528 N of pull force. The push force is higher because the single rod reduces the effective piston area on the return stroke.
A screw in the rear cap sets the stroke end position. You can shorten the 500 mm nominal stroke by up to 30 mm in the field. It only limits the extend stroke, providing a mechanical end-stop adjustment without changing the cylinder body.
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