The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X200-40 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, 200mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X200-40 is a large-bore, double-acting single-rod cylinder delivering 24544 N of push force at just 0.5 MPa, making it a powerhouse for heavy industrial actuation. Its rear-cap adjusting screw provides a 40 mm field-adjustable stroke range, allowing operators to fine-tune the end position for commissioning or wear compensation without removing the 50 mm rod and M42x2 knuckle thread assembly.
Built on a robust tie-rod platform with a 409 mm body length, this ISO 6430 class cylinder handles strokes up to 1500 mm. The integrated 40 mm air cushion decelerates high-inertia loads smoothly, while the PT1 port ensures high flow for demanding cycle rates.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X200-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 200 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. |
| ×200 | 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 material stop position in a stamping press feeder by up to 40 mm to accommodate different die sets or material thicknesses without mechanical rework.
Adjust the stroke end on a bulk material gate or diverter valve to precisely control the opening, compensating for seal wear and ensuring a tight shut-off over the equipment's life.
Set the precise lateral position of a heavy-duty guide roller on a conveyor line during commissioning, using the 40 mm screw range to center products of varying widths.
For applications requiring slightly less force, the SCJ200 bore offers 15708 N of push at 0.5 MPa. If the 200 mm nominal stroke is sufficient but you need a fixed end position, a standard SC250X200 is a simpler alternative. This SCJ model is a direct replacement for another SCJ250X200-40 with PT ports and basic mounting; ensure the 40 mm adjustment range matches your setup.
At this 200 mm stroke, the 50 mm rod provides excellent column strength, but for applications with significant side loads, an external guide rail or a switch to a guided cylinder is recommended to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, it provides 24544 N of push force and 23562 N of pull force. The maximum push force at 0.9 MPa is 44178 N. The force is identical to a fixed-stroke SC250 cylinder.
Yes, the SCJ250X200-40 is dimensionally compatible with an SC250X200 in terms of bore, rod, and porting, but the body is slightly longer to house the adjusting screw. It allows you to fine-tune the stroke end by up to 40 mm, which the fixed-stroke SC cannot do.
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