The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X500-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø250mm bore, 500mm nominal stroke, PT1" ports and adjustable end cushioning.
The AirTAC SCJ250X500-30S is a robust, double-acting single-rod cylinder designed for heavy-duty applications where the end-of-stroke position needs fine-tuning on the machine. With a 250 mm bore and a 50 mm piston rod, it delivers a substantial push force of 24544 N at 0.5 MPa, making it a powerful choice for pressing, clamping, and material handling. The rear adjusting screw provides a 30 mm range to shorten the nominal 500 mm stroke, allowing operators to dial in the exact stopping point without swapping the cylinder.
This ISO 6430 class tie-rod cylinder features an adjustable air cushion for smooth deceleration and a body length of 409 mm. The integrated magnet (suffix -S) allows for direct mounting of CMSG/DMSG/EMSG sensors along the barrel for reliable, non-contact position feedback. It operates on filtered air from 0.15 to 1.0 MPa and uses a standard PT1 inch port.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X500-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 500 mm |
| Stroke adjustment | Up to 30 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. |
| ×500 | Nominal (maximum) stroke length in mm. |
| -30 | 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 pressing depth on large assembly fixtures. The 30 mm adjustment screw lets operators compensate for part tolerance variations or tooling wear without reprogramming, ensuring consistent clamp force and product quality.
Acts as a robust, adjustable end-stop for pallets or heavy components on a conveyor. The 24544 N push force at 0.5 MPa can halt significant loads, and the stroke can be quickly dialed in for different product sizes during a batch changeover.
Used in sawmill carriages to set the cutting width. The adjustable stroke allows for rapid changes between board dimensions. The large 50 mm rod and tie-rod construction withstand the harsh, dirty environment, while the sensor confirms the home position.
Select the SCJ250X500-30S when your application demands high force and field-adjustable stroke end positioning. If you need a step up in force, this is the largest standard bore in the SCJ series. For a lighter, more compact solution, consider the SCJ200 bore, which provides 15708 N of push force at 0.5 MPa. The adjustable stroke is ideal for commissioning and format changes, but if your stroke is fixed, a standard SC cylinder is a simpler, more cost-effective alternative. For this 500 mm stroke, be mindful of side loads; if the rod is not guided externally, rod bending can occur. Use an external guide rail or switch to a guided cylinder assembly to ensure long seal life.
This model is a direct replacement for another AirTAC SCJ250X500-30S cylinder with a PT port and built-in magnet. Ensure the replacement matches the bore, nominal stroke, 30 mm adjust range, and sensor compatibility to guarantee identical form, fit, and function.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this cylinder provides a push force of 24544 N and a pull force of 23562 N. The push force is higher because the single piston rod reduces the effective area on the return stroke. The maximum theoretical force at 1.0 MPa is 5006 kgf.
No, an SCJ cylinder will not hold its position without live air pressure. The adjustable screw only sets the end-of-stroke position and does not act as a lock. If the load must be safely held when the valve is centered or pressure is exhausted, you must add an external rod brake, a mechanical lock, or a pilot-operated check valve.
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