The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X275-50 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. Ø50mm bore, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X275-50 is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly in your hands. Its rear-cap adjusting screw provides up to 50 mm of field-adjustable stroke reduction, letting you dial in the exact end position for commissioning, format changes, or wear take-up without swapping the cylinder or adding external hard stops. With a 50 mm bore and 20 mm rod, it delivers 982 N of push force at 0.5 MPa and 1767 N at the maximum operating pressure of 0.9 MPa.
Built on the rugged SC tie-rod platform, this model has a body length of 194 mm plus stroke and features an adjustable air cushion for smooth deceleration. The PT1/4 port and M16x1.5 rod thread integrate easily into standard pneumatic circuits. This is a basic configuration with TPU seals and PT threads, ready for general industrial service in the -20 to +70 °C range.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X275-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 275 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×275 | 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 stroke end position on a new assembly line without iterative disassembly. The 50 mm adjustment range lets technicians quickly dial in the perfect actuator throw during initial machine bring-up.
Adjust the cylinder stroke to accommodate different product sizes on a packaging or sorting line. The rear screw makes format changes fast and repeatable, minimizing downtime between batches.
Take up mechanical play or tooling wear over time by slightly extending the effective stroke. This keeps clamping, pressing, or ejector mechanisms operating at peak precision without replacing the cylinder.
Choose the SCJ50X275-50 when you need mid-range force and the ability to tweak the stroke end by up to 50 mm on the machine. If your load requires more push force, stepping up to the 63 mm bore provides 1559 N at 0.5 MPa; for a lighter, more compact solution, the 40 mm bore offers 628 N. This adjustable-stroke model is ideal where process parameters change, but if your application uses a fixed, unchanging stroke, the standard SC50 series is a simpler, cost-effective alternative. For strokes of 275 mm, be mindful of side loads on the 20 mm rod—consider an external guide rail or a guided cylinder if the load is not perfectly axial. As a direct replacement, match the 50 mm bore, 275 mm nominal stroke, 50 mm adjust range, PT ports, and basic mounting style.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder provides 982 N of push force and 825 N of pull force. At the maximum operating pressure of 0.9 MPa, the push force increases to 1767 N. The pull force is lower due to the area of the 20 mm piston rod.
A rear-cap screw lets you shorten the stroke end by up to 50 mm, so the effective stroke can be set anywhere between 225 mm and the nominal 275 mm. It is a direct dimensional replacement for a fixed-stroke SC50X275 when you need field adjustability, provided the port size (PT1/4), mounting style, and magnet options are matched.
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