The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X260-50S 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. Ø80mm bore, 260mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X260-50S is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw that provides up to 50 mm of field-adjustable stroke-end control, allowing fine-tuning without removing the cylinder from the machine. Its 80 mm bore delivers a push force of 2513 N at 0.5 MPa and 4523 N at the maximum operating pressure of 0.9 MPa, making it a robust choice for medium-to-heavy industrial positioning tasks.
This model features a built-in magnet (-S suffix), enabling direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for reliable end-of-stroke detection. The 25 mm diameter piston rod, PT3/8 ports, and 28 mm air cushion work together to provide smooth deceleration, while the 239 mm base body length keeps the assembly compact for its force class.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X260-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 260 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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, 28 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 | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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. |
|---|---|
| 80 | Bore size in mm. |
| ×260 | 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.
The 50 mm adjustable stroke lets technicians dial in the exact stop position during initial machine setup, compensating for stack-up tolerances without swapping cylinders or machining custom stops.
On packaging or assembly lines running multiple product sizes, the rear screw allows operators to quickly reset the stroke end for different box heights or part lengths, minimizing downtime between batches.
In clamping or pressing fixtures where tooling or contact pads wear over time, the adjustable stroke can be periodically extended to maintain consistent clamping force and part contact.
Choose the SCJ80X260-50S when you need a 260 mm nominal stroke with the ability to shorten the end position by up to 50 mm for commissioning or format changes. If your application requires more force, stepping up to the 100 mm bore provides 3927 N of push at 0.5 MPa; for a lighter, more compact solution, the 63 mm bore offers 1559 N. A fixed-stroke SC80 cylinder is a simpler, lower-cost alternative if stroke adjustment is not required.
For this 260 mm stroke, consider the potential for side loading on the 25 mm rod. If the load is not guided, an external linear guide or a switch to a guided cylinder will prevent rod bending and premature seal wear. This SCJ cylinder is a direct replacement for another AirTAC SCJ80X260-50S with PT ports, basic mounting, and a magnet.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The force increases with pressure, reaching a maximum push of 4523 N at the 0.9 MPa operating limit. The pull force is always lower due to the area of the 25 mm piston rod.
A screw in the rear cap sets the physical end-of-stroke position, shortening the 260 mm nominal stroke by up to 50 mm. It is a mechanical stop for the piston, 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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