The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X250-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø250mm bore, 250mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X250-10S is a large-bore, double-acting single-rod cylinder with a rear-cap adjusting screw, giving you up to 10 mm of field-adjustable stroke-end trimming. Its 50 mm diameter rod and PT1" port deliver a substantial 24544 N of push force at just 0.5 MPa, making it a workhorse for heavy pressing, clamping, and material handling stations where you need to dial in the final stop position precisely.
This model includes a built-in magnet (-S), so you can clamp CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the tie-rod barrel for end-of-stroke detection. The body length A(SCJ) is 409 mm, and the generous 40 mm air cushion decelerates the piston smoothly. Operating pressure is 0.15-1.0 MPa, with a proof pressure of 1.5 MPa.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X250-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 250 mm |
| Stroke adjustment | Up to 10 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. |
| ×250 | Nominal (maximum) stroke length in mm. |
| -10 | 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 a large hydraulic-style pneumatic press by adjusting the rear screw, compensating for tooling wear or material thickness changes without reprogramming the machine.
Dial in the exact stopping position for heavy pallets on a gravity conveyor. The 10 mm adjust range lets operators quickly accommodate different pallet sizes during a format changeover.
Set the precise clamp closure point on a large welding fixture. The built-in magnet allows sensors to confirm the clamp has reached its adjusted position every cycle, ensuring part quality.
Choose the SCJ250 for applications demanding over 24000 N of push force at standard shop air. If your load is lighter, stepping down to the 200 mm bore (15708 N push at 0.5 MPa) can reduce air consumption and physical size. For fixed-stroke applications without the need for end-position tuning, the standard SC250 is a simpler alternative. The adjustable stroke is purely for setting the stroke end—it does not alter output force.
For this 250 mm stroke, ensure the rod is well-supported against side loads. If the application involves off-axis forces, use an external guide rail or switch to a guided cylinder. To replace this unit, match the 250 mm bore, 250 mm nominal stroke, 10 mm adjust range, PT port thread, and the -S magnet option with another AirTAC SCJ adjustable-stroke cylinder.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 24544 N and the pull force is 23562 N. Because it is a single-rod cylinder, the pull force is slightly lower due to the 50 mm rod area. The maximum push force at 0.9 MPa is 44178 N.
A screw in the rear cap allows you to shorten the stroke end by up to 10 mm. It sets the physical stop for the piston, letting you fine-tune the cylinder's extended position in the field without changing the nominal 250 mm stroke rating or the cylinder itself.
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