The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X260-75 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. Ø80mm bore, 260mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X260-75 is an 80 mm bore double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 75 mm of field-adjustable stroke reduction. This allows the effective stroke to be fine-tuned between 185 mm and the nominal 260 mm without replacing the cylinder or adding external hard stops. It delivers a substantial 2513 N of push force and 2268 N of pull force at 0.5 MPa, making it suitable for medium-duty positioning and clamping tasks where the end position must be dialed in precisely.
The cylinder body length (A dimension) is 239 mm, and it uses a 25 mm diameter piston rod with an M20x1.5 rod thread for robust tooling attachment. Air is supplied through PT3/8 ports, and the unit features an adjustable air cushion with a 28 mm cushion length to decelerate the piston smoothly at the end of its travel. This is a genuine AirTAC component built for reliable service in industrial automation environments.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X260-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 260 mm |
| Stroke adjustment | Up to 75 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. |
| -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.
The 75 mm adjustment range lets commissioning engineers quickly dial in the exact stroke end position on a new assembly line without machining custom stops, speeding up the initial machine bring-up.
On a packaging line, the stroke can be re-adjusted in minutes to accommodate a new box size or product format, eliminating the downtime needed to swap out a fixed-stroke cylinder.
In a clamping or pressing fixture, the adjusting screw can be advanced over time to compensate for pad wear or material compression, maintaining consistent clamping force without reprogramming a servo axis.
For applications needing more force, stepping up to the 100 mm bore SCJ100X260-75 provides 3927 N of push force at 0.5 MPa. If a shorter, fixed stroke is acceptable, the standard SC80X260 cylinder eliminates the adjusting screw for a simpler, slightly more compact design. This SCJ model is a direct replacement for another AirTAC SCJ80X260-75 cylinder with PT ports and basic mounting; ensure the -75 adjustable range matches your machine's setup requirements.
At a 260 mm stroke, consider the potential for side loading on the 25 mm rod. If the load is not guided and applies a radial force, rod bending or premature seal wear can occur. In such cases, use an external guide rail or switch to a guided cylinder to ensure the rod moves in a pure linear path and protect the cylinder's service life.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the cylinder produces 2513 N of push force on the full bore area and 2268 N of pull force on the rod side. The maximum push force at 0.9 MPa is 4523 N. The adjusting screw changes only the stroke end position and does not alter the cylinder's force output.
A rear-cap screw lets you shorten the stroke end by up to 75 mm from the 260 mm nominal maximum. It is a mechanical stop for the piston, not a speed or force controller. This SCJ80X260-75 is a direct form-and-function replacement for any AirTAC SCJ80 cylinder with a 260 mm nominal stroke, a 75 mm adjust range, PT3/8 ports, and basic mounting. Always match the bore, nominal stroke, and adjust range code.
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