The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X175-10S 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, 175mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X175-10S is a heavy-duty double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. Its 250 mm bore generates a substantial 24544 N of push force at 0.5 MPa, making it suitable for large-scale pressing, clamping, and material handling tasks where the final stroke position needs fine-tuning. The rear adjusting screw provides a 10 mm range to shorten the nominal 175 mm stroke, allowing for quick setup changes without replacing the cylinder.
This model features a built-in magnet (-S suffix), enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for precise end-of-stroke detection. It uses a 50 mm diameter piston rod with an M42x2 thread, PT 1-inch ports, and a 40 mm air cushion to decelerate high inertial loads. The body length A(SCJ) is 409 mm, and the unit is built for demanding industrial environments.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X175-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 175 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. |
| ×175 | 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 for bearing or bushing insertion on an assembly line. The 10 mm adjustment screw compensates for part tolerance variations without reprogramming the press.
Control the opening position of a material diverter gate on a large conveyor. The adjustable stroke end allows operators to quickly match the gate opening to different product sizes, handling the high push force required for heavy loads.
Apply a powerful 24544 N clamping force to workpieces of varying thickness. The stroke-end screw is set to prevent over-travel, protecting the fixture while ensuring full clamping pressure is achieved on each cycle.
Choose this SCJ250 when you need the highest force class in the SCJ range and the ability to dial in a precise stroke end. If 24544 N of push force at 0.5 MPa is more than required, stepping down to a 200 mm bore reduces push force to 15708 N. For applications where the stroke end is permanently fixed and no adjustment is needed, a standard SC fixed-stroke cylinder is a more economical choice. For a direct replacement, match a 250 mm bore SCJ cylinder with a 175 mm nominal stroke, a -10 adjustable range, PT ports, a basic mount, and a magnet.
At a 175 mm stroke, the rod is well-supported, but for any application with significant side loading, an external guide rail or a switch to a guided cylinder is strongly recommended to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the push force is 24544 N and the pull force is 23562 N. The push force is higher because it acts on the full 250 mm bore area, while the pull force is reduced by the area of the 50 mm piston rod.
The -10 indicates a 10 mm adjustable range for the stroke end, set by a mechanical screw in the rear cap. It physically limits how far the piston can extend, shortening the nominal 175 mm stroke. This is a position adjustment, not a speed control. A flow control valve is a separate component used to manage cylinder speed.
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