The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X400-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø40mm bore, 400mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X400-100 brings field-adjustable stroke control to the 40 mm bore class, delivering 628 N of push force at a standard 0.5 MPa supply. Its rear-cap adjusting screw provides up to 100 mm of stroke-end reduction, letting technicians fine-tune the piston stop without removing the cylinder or adding external hard stops—ideal for commissioning and format changeovers.
This double-acting, single-rod cylinder uses a 16 mm diameter rod and PT1/4 ports, with a 21 mm air cushion at each end to decelerate the load. The body length A(SCJ) is 185 mm, and the standard stroke of 400 mm is well within the 1200 mm maximum for this bore. Operating pressure spans 0.15–1.0 MPa, and the default TPU seals suit ambient temperatures from -20 to +70 °C.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X400-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 400 mm |
| Stroke adjustment | Up to 100 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. |
| ×400 | Nominal (maximum) stroke length in mm. |
| -100 | 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 100 mm adjustment range lets integrators dial in the exact end position during machine commissioning without cutting brackets or adding shims, speeding up line start-up.
On packaging or filling lines, operators can quickly re-set the stroke end for different product heights or container sizes using the rear screw, minimizing downtime between batches.
In clamping or pressing fixtures, the adjustable stop can be advanced over time to take up pad or tooling wear, maintaining consistent clamp force without replacing the cylinder.
Choose the SCJ40X400-100 when you need to dial in a 400 mm nominal stroke by up to 100 mm on the machine. If the 628 N push force at 0.5 MPa is marginal, stepping up to the 50 mm bore (SCJ50) raises push to 982 N; if space or force is over-specified, the 32 mm bore provides 402 N. For applications that do not require stroke adjustment, the fixed-stroke SC40X400 simplifies the bill of materials. At this 400 mm stroke, ensure the rod is guided externally or use a guided cylinder if the load applies significant side force, to prevent rod bending and premature seal wear. A direct replacement must match the SCJ40 bore, 400 mm nominal stroke, 100 mm adjust range, PT thread, and basic mounting.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N (the difference is due to the single 16 mm rod). At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N. The theoretical maximum at 1.0 MPa is 128 kgf.
It is a direct replacement for another AirTAC SCJ40 adjustable-stroke cylinder with a 400 mm nominal stroke, 100 mm adjust range, PT ports, and basic mounting. It is not dimensionally interchangeable with ISO 15552 cylinders. If you do not need stroke adjustment, consider the fixed-stroke SC40 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.