The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X100-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø250mm bore, 100mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X100-50 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the 100 mm nominal stroke by up to 50 mm using the rear-cap adjusting screw. This ISO 6430 class tie-rod cylinder delivers substantial force, generating 24544 N of push and 23562 N of pull at 0.5 MPa, with a 50 mm diameter rod and PT1" ports.
Designed for heavy-duty applications where the final stop position needs on-machine tweaking, the SCJ250X100-50 eliminates the need for external hard stops. The adjustable screw shortens the stroke end without altering the cylinder's 409 mm body length A or its 40 mm air cushion, providing a robust and adaptable solution for commissioning and format changes.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X100-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 50 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. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -50 | 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-pneumatic press by adjusting the stroke end screw, accommodating tooling wear or different material thicknesses without reprogramming.
Precisely set the open/closed position of a large industrial damper or material flow baffle, allowing for on-site calibration to achieve the exact flow rate required.
Adjust the push-off stroke on a heavy palletizing station to perfectly align with different layer heights or pallet types, ensuring consistent stack formation during format changeovers.
Choose the SCJ250X100-50 when you need the immense force of a 250 mm bore and the ability to dial in the stroke end position. If your force requirements are lower, stepping down to the 200 mm bore SCJ200 series reduces push force to 15708 N at 0.5 MPa, which may be a more cost-effective and compact solution. For applications needing a fixed, non-adjustable stroke, the standard SC250 series is the direct alternative. A direct replacement must match the 250 mm bore, 100 mm nominal stroke, 50 mm adjust range, PT port thread, and basic mounting. For strokes of 300 mm or more, always consider external guides or a guided cylinder to manage side loads and prevent rod bending.
Adjustable-stroke checklist
At the maximum operating pressure of 1.0 MPa, the theoretical push force is 44178 N (5006 kgf). At the standard 0.5 MPa, it provides 24544 N of push force and 23562 N of pull force. The pull force is lower due to the area of the 50 mm piston rod.
A rear-cap adjusting screw limits the piston's travel, shortening the stroke end by up to 50 mm. It is a mechanical stop for positioning, not a locking device. The cylinder will not hold its position if air pressure is lost; an external rod lock or pilot-operated check valve is required for load holding.
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