The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X150-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø250mm bore, 150mm nominal stroke, PT1" ports and adjustable end cushioning.
The AirTAC SCJ250X150-100S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering a substantial 24544 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides up to 100 mm of stroke-end reduction, allowing engineers to fine-tune the piston stop position on the fly without disassembling the cylinder or adding external hard stops. This model includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors.
With a 50 mm diameter piston rod, M42x2 rod thread, and PT1 inch ports, this ISO 6430 class tie-rod cylinder is built for heavy-duty applications. The adjustable air cushion, with a 40 mm cushion length, ensures smooth deceleration of large loads. The body length A(SCJ) is 409 mm, and the maximum theoretical force reaches 5006 kgf at 1.0 MPa, making it a powerhouse for format changes and commissioning tasks on large-scale equipment.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X150-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 100 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. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -100 | 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 on a large hydraulic-style pneumatic press by adjusting the stroke end screw, ensuring consistent part forming without over-travel.
Quickly adapt a heavy-duty material handling stop gate to different pallet or product sizes on a conveyor line by changing the cylinder's extended stop position.
Compensate for gradual wear on a large clamp or riveting die by incrementally increasing the stroke, maintaining clamping force and cycle precision over the tool's lifespan.
Select the SCJ250X150-100S when you need a high-force actuator with the flexibility to adjust the stroke end position by up to 100 mm during setup or changeovers. If your force requirement is lower, stepping down to a 200 mm bore SCJ reduces push force to 15708 N at 0.5 MPa, offering a more compact and economical solution. For applications requiring a fixed, non-adjustable stroke, the standard SC series is the appropriate choice. This model is a direct replacement for another AirTAC SCJ250 cylinder with a 150 mm nominal stroke, 100 mm adjust range, PT ports, and a magnetic piston. For strokes of 300 mm or more, carefully evaluate side-loading on the 50 mm rod and consider an external guide rail or a guided cylinder to prevent rod bending and ensure long seal life.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the push force is 24544 N and the pull force is 23562 N. The maximum push force at the 0.9 MPa operating limit is 44178 N. Because it is a single-rod cylinder, the push force is greater than the pull force due to the area of the 50 mm rod.
A rear-cap adjusting screw allows you to shorten the stroke end by up to 100 mm from the 150 mm nominal maximum. It is a direct replacement for another SCJ250 with the same bore, nominal stroke, and 100 mm adjust range. It cannot directly replace a fixed-stroke SC cylinder unless you require the field-adjustability feature and the mounting dimensions are verified.
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