The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X160-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø250mm bore, 160mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X160-40 is a heavy-duty, double-acting single-rod pneumatic cylinder from the ISO 6430 class, built for applications where the end-of-stroke position must be tuned on the machine. Its rear-cap adjusting screw provides a 40 mm field-adjustable range, letting operators shorten the stroke end without dismounting the cylinder or adding external hard stops. With a 50 mm diameter piston rod and a 1-inch PT port, it delivers a substantial 24544 N of push force at 0.5 MPa.
This model features a 160 mm nominal stroke, well within the 1500 mm maximum standard stroke for the 250 mm bore. The adjustable air cushion, with a 40 mm cushion length, decelerates the piston smoothly. The body length A(SCJ) is 409 mm, and the unit operates across a standard temperature range of -20 to +70 °C with filtered air. For position sensing, a magnet can be added by ordering the -S suffix variant.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X160-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 160 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1" |
| Rod thread | M42×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 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 | 24544 N | 23562 N |
| 0.7 MPa | 34361 N | — |
| Max (@1.0 MPa) | 5006 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. |
|---|---|
| 250 | Bore size in mm. |
| ×160 | Nominal (maximum) stroke length in mm. |
| -40 | 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.
Fine-tune the final pressing depth in large hydraulic or pneumatic presses. The 40 mm screw adjustment allows operators to dial in the exact stopping position for different die sets or material thicknesses without reprogramming the entire stroke.
Maintain consistent belt tension on large aggregate conveyors. The adjustable stroke compensates for belt stretch over time, and the 24544 N push force at 0.5 MPa provides ample power for heavy tensioner mechanisms.
Set precise guide positions for billets or slabs in a rolling mill. The field-adjustable stroke end allows for quick format changes between different product widths, reducing downtime during production changeovers.
Choose the SCJ250 bore when your application requires a push force of 24544 N at 0.5 MPa. If your force requirement is lower, stepping down to the 200 mm bore provides 15708 N of push force. The 40 mm adjustable stroke range is ideal for commissioning new tooling or compensating for wear in heavy industrial processes. For a fixed, non-adjustable stroke, the standard SC250 cylinder is a more economical alternative. If the load introduces significant side forces, an external guide rail or a guided cylinder is necessary to prevent rod bending. A direct replacement must match the 250 mm bore, 160 mm nominal stroke, 40 mm adjust range, PT port thread, and basic mounting configuration.
Adjustable-stroke checklist
At an operating pressure of 0.5 MPa, the push force is 24544 N and the pull force is 23562 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 44178 N. The pull force is lower due to the area of the 50 mm piston rod.
No, like all standard double-acting cylinders, the SCJ250X160-40 will not hold its position if air pressure is lost or the valve is centered. The piston can drift or drop under load. If load holding is required without live pressure, you must add an external rod lock, brake, or a pilot-operated check valve.
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.