The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X160-50 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, 160mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X160-50 is a heavy-duty, double-acting single-rod pneumatic cylinder with a field-adjustable stroke end, allowing operators to fine-tune the stopping position by up to 50 mm without replacing the unit. With a 250 mm bore delivering 24544 N of push force at just 0.5 MPa, it is built for the largest pressing, clamping, and positioning tasks where force is non-negotiable but stroke length needs on-machine tweaking.
This ISO 6430 class tie-rod cylinder uses a 50 mm piston rod and a 1-inch PT port, with a generous 40 mm air cushion to decelerate high-inertia loads. The rear adjusting screw sets the stroke end within the 50 mm range, making it ideal for commissioning large-scale automation, accommodating tooling wear, or adjusting for different product formats without disrupting the main mounting setup.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X160-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 160 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. |
| ×160 | 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.
During commissioning of a large hydraulic-style pneumatic press, the 50 mm adjustment range lets technicians dial in the exact final pressing depth for consistent part forming without machining custom stops.
On a conveyor system handling different pallet sizes, the adjustable stroke end can be quickly reset to position a stop gate precisely for each new pallet dimension, eliminating mechanical change parts.
In a long-running fatigue test rig, the stroke end can be incrementally adjusted outward to compensate for grip wear or material compression, maintaining a constant clamp force without reprogramming the machine.
Step up to this 250 mm bore when the SCJ200's 15708 N push at 0.5 MPa is insufficient for the load. If your application requires a fixed, unchangeable stroke, the standard SC250 series provides the same force in a slightly shorter body length. For applications where the 160 mm nominal stroke and 50 mm adjustment range are critical, ensure any replacement matches the bore, nominal stroke, adjust range, and PT port thread exactly. Given the substantial 50 mm rod diameter, side-loading is a primary concern at this 160 mm stroke; an external guide rail or a switch to a guided cylinder is strongly recommended if the load is not perfectly axial.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the push force is 24544 N. The pull force on the retract stroke is lower, at 23562 N, due to the area of the 50 mm rod. The maximum theoretical push force at 1.0 MPa is 5006 kgf.
Yes, if you need the ability to fine-tune the stroke end. The SCJ250X160-50 has the same bore, port size (PT 1"), and rod diameter as an SC250, but its body is slightly longer to house the rear adjusting screw. Ensure the 50 mm adjustment range and the physical length fit your machine's envelope.
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