The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X160-20S 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. Ø250mm bore, 160mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X160-20S is a heavy-duty double-acting single-rod cylinder with a field-adjustable stroke end, delivering 24544 N of push force at just 0.5 MPa. Its rear-cap adjusting screw provides up to 20 mm of fine-tuning on the stroke end position, making it ideal for large-scale commissioning and format changeovers without swapping the cylinder.
This ISO 6430 class tie-rod cylinder uses a 50 mm diameter piston rod and a 1-inch PT port, with an adjustable air cushion that decelerates the 160 mm nominal stroke smoothly. The built-in magnet allows CMSG/DMSG/EMSG sensors to be clamped directly onto the barrel for reliable end-of-stroke detection.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X160-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 160 mm |
| Stroke adjustment | Up to 20 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. |
| -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.
Fine-tune the end-stop position on large forming presses and stamping machines to accommodate different material thicknesses or tool wear, all without disassembling the tooling.
Adjust the stroke of a diverter gate or transfer arm on a conveyor line handling heavy pallets or bulk goods, enabling quick changeovers between product sizes.
Simplify the setup of large-scale industrial machinery by allowing engineers to dial in the exact stroke end position during initial commissioning and after maintenance.
Choose the SCJ250 when your application demands the highest force in the SCJ range, with 24544 N of push at 0.5 MPa. If a smaller footprint is acceptable, stepping down to a 200 mm bore reduces push force to 15708 N. For applications where the stroke length is fixed and never needs field adjustment, a standard SC fixed-stroke cylinder is a more economical choice. To replace this unit, match a genuine AirTAC SCJ with a 250 mm bore, 160 mm nominal stroke, a 20 mm adjust range, PT ports, and a magnet-equipped barrel.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 24544 N and the pull force is 23562 N due to the 50 mm single rod. The maximum push force at 0.9 MPa is 44178 N.
A rear adjusting screw lets you shorten the stroke end by up to 20 mm. It is a direct replacement for another AirTAC SCJ with the same bore, nominal stroke, and adjust range. The screw sets the end position only; it does not change the cylinder's force or speed.
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