The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X175-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø40mm bore, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X175-20 is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly at the rear cap. Its M12x1.25 rod delivers 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa), while the 20 mm adjusting screw lets you dial back the stroke from the 175 mm nominal maximum without dismounting the cylinder or adding external hard stops—ideal for commissioning and format changes.
This 40 mm bore tie-rod cylinder uses PT1/4 ports and includes an adjustable air cushion (21 mm long) for smooth deceleration. The SCJ body length A is 185 mm, slightly longer than a fixed-stroke SC to house the screw mechanism. Operating pressure spans 0.15–1.0 MPa, with a speed range of 30–800 mm/s, and the standard TPU seals cover -20 to +70 °C.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X175-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 175 mm |
| Stroke adjustment | Up to 20 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. |
| ×175 | Nominal (maximum) stroke length in mm. |
| -20 | 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.
Field-adjust the 20 mm stroke end to precisely set a stop position during machine installation without swapping cylinders or machining custom spacers.
Quickly fine-tune the push stroke for different product sizes on a packaging line, reducing downtime between batch runs with the rear adjusting screw.
Take up mechanical play or tooling wear over time by slightly shortening the stroke end, maintaining consistent clamp or press depth without replacing the actuator.
Step up to the 50 mm bore SCJ if your application demands more than the 628 N push this 40 mm unit provides at 0.5 MPa—the SCJ50 delivers 982 N at the same pressure. For a fixed, non-adjustable stroke, the standard SC series is a simpler, more compact alternative. This SCJ40X175-20 is a direct dimensional replacement only for another AirTAC SCJ of the same 40 mm bore, 175 mm nominal stroke, 20 mm adjust range, PT port thread, and basic mounting configuration.
Adjustable-stroke checklist
At 0.5 MPa, it generates 628 N pushing and 528 N pulling (the difference is due to the 16 mm single rod). At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N.
Physically, it may fit, but the SCJ body is longer (185 mm) to house the adjusting screw. It is a direct replacement only for an SCJ40X175-20 with matching PT ports and basic mount. If you need the exact fixed stroke, order the SC series.
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.