The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X75-30S 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, 75mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCJ40X75-30S is a double-acting, single-rod tie-rod cylinder with a rear adjusting screw that provides a 30 mm field-adjustable stroke range, letting you fine-tune the end position without swapping the unit. 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 light-to-medium pneumatic tasks where stroke length needs on-machine tweaking.
This model includes a built-in magnet (-S suffix), so standard CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the barrel for reliable end-of-stroke detection. The body length A(SCJ) is 185 mm, slightly longer than a fixed-stroke SC to house the adjustment mechanism, and it uses PT1/4 ports with an M12x1.25 rod thread.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X75-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 75 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. |
| ×75 | 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.
Dial in the exact 75 mm stroke end position on a new assembly machine using the 30 mm adjustment screw, eliminating the need to fabricate custom mechanical stops.
Quickly adjust the push-off stroke for different box sizes on a packaging line. The 628 N push force handles medium cartons, and the sensor magnet confirms retraction before the next cycle.
Take up mechanical play in a clamping fixture over time by slightly extending the stroke via the rear screw, maintaining consistent 528 N pull force without replacing the cylinder.
Choose the SCJ40 when you need up to 628 N of push force and the ability to adjust stroke end by up to 30 mm during commissioning or changeovers. If your load requires more force, step up to the SCJ50 which provides 982 N push at 0.5 MPa; for a lighter, more compact solution, the SCJ32 offers 402 N push. If your application never needs stroke adjustment, the fixed-stroke SC series is a simpler, cost-effective alternative.
For a direct replacement, match the 40 mm bore, 75 mm nominal stroke, 30 mm adjust range, PT thread, basic mounting, and the -S magnet option. For strokes of 300 mm or more, consider an external guide rail or a guided cylinder to protect the 16 mm rod from side-load bending.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 40 mm bore cylinder generates 628 N of push force and 528 N of pull force. At the maximum operating pressure of 1.0 MPa, the push force reaches 1130 N.
Not if you need the adjustable stroke feature. A fixed-stroke SC40 will not have the rear adjusting screw to set the stroke end within a 30 mm range. You must replace it with another SCJ40X75-30S or an SCJ with matching bore, stroke, and adjust range.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.