The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X200-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø250mm bore, 200mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X200-75 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 75 mm of field-adjustable stroke-end control, letting you fine-tune the piston stop position without replacing the unit. This ISO 6430 class tie-rod cylinder delivers a substantial 24544 N push force at 0.5 MPa and can reach 44178 N at the maximum 0.9 MPa operating pressure, driven by a 50 mm diameter piston rod.
With a body length A of 409 mm and a 40 mm air cushion at each end, the SCJ250X200-75 is built for heavy-duty applications where precise mechanical end-stop adjustment is critical. The standard PT 1-inch ports and M42x2 rod thread ensure robust air flow and secure tooling attachment, while the TPU seals offer reliable operation from -20 to +70 °C.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X200-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 75 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. |
| -75 | 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.
Dial in the final pressing depth on a large hydraulic-pneumatic forming press. The 75 mm adjustment range lets operators compensate for different material thicknesses or tooling wear without disassembling the machine.
Fine-tune the push-off stroke on a palletizing station. The adjustable stroke end allows for precise layer alignment when switching between different product heights or pallet types, maximizing stack stability.
Control the opening angle of a large material flow gate in a foundry or recycling plant. The SCJ250X200-75 sets a repeatable mechanical stop, ensuring consistent flow rates while the 24544 N force handles heavy, sticky materials.
Select the SCJ250X200-75 when your application demands high force and the ability to dial in the stroke end position during commissioning or changeovers. For a step down in force, the SCJ200 bore provides 15708 N push at 0.5 MPa; if you need even more power, this 250 mm bore is the largest in the SCJ family. The 75 mm adjustment range is ideal for compensating for tooling wear or setting precise hard stops in large-scale automation.
For a direct replacement, match the 250 mm bore, 200 mm nominal stroke, 75 mm adjust range, PT port thread, and basic mounting configuration. If your application involves significant side loading on the 200 mm stroke, consider an external guide rail or a guided cylinder to prevent rod bending and ensure long seal life. When a fixed stroke is sufficient, the standard SC series offers the same force output without the adjustable feature.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 24544 N and the pull force is 23562 N. The force increases with pressure, reaching a maximum push of 44178 N at the 0.9 MPa operating limit. The pull force is lower because the 50 mm rod reduces the effective piston area on the return stroke.
Yes, provided the bore (250 mm), nominal stroke (200 mm), and port thread (PT 1 inch) match. The SCJ250X200-75 has the same mounting footprint as an SC of the same bore but includes a rear adjusting screw for stroke-end control. Ensure you have clearance for the slightly longer body length A of 409 mm.
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