The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X275-75S 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, 275mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X275-75S is a double-acting, single-rod pneumatic cylinder from AirTAC that gives you field-adjustable stroke control without swapping hardware. With a 75 mm rear-end adjustment range, you can fine-tune the stroke end position on the fly, making it ideal for commissioning trials, format changeovers, and taking up mechanical wear. The built-in magnet lets you mount CMSG/DMSG/EMSG sensors directly on the tie-rod barrel for reliable end-of-stroke detection.
This 80 mm bore model delivers 2513 N of push force at 0.5 MPa and up to 4523 N at 0.9 MPa, using a 25 mm diameter piston rod. It features a PT3/8 port, an M20x1.5 rod thread, and a 28 mm adjustable air cushion for smooth deceleration. The body length A(SCJ) is 239 mm, and the standard operating speed range is 30-800 mm/s.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X275-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 275 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. |
| ×275 | 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 screw allows engineers to precisely dial in the stroke end during machine setup without changing the cylinder, drastically reducing commissioning time on new assembly lines.
Quickly adapt the stroke for different product sizes on a packaging or sorting line. The adjustable stroke eliminates the need for mechanical hard stops, enabling a faster changeover between batches.
In high-cycle clamping or pressing applications, the adjustable stroke can be periodically extended to compensate for tooling or pad wear, maintaining consistent contact force without replacing the actuator.
Choose the SCJ80X275-75S when you need the force of an 80 mm bore with the flexibility to adjust the stroke end by up to 75 mm. If your application requires less force, stepping down to a 63 mm bore reduces push force to 1559 N at 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC80 series is a direct alternative. This cylinder is a direct replacement for any AirTAC SCJ80X275-75S with a PT port, basic mounting, and a magnet. For strokes of 300 mm or more, be mindful of side loading; if the rod is not guided, consider an external guide rail or a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. The maximum push force at the 1.0 MPa operating limit is 4523 N. The pull force is lower due to the 25 mm piston rod area.
The rear-cap adjusting screw sets the physical end-of-stroke position, shortening the nominal 275 mm stroke by up to 75 mm. It is a mechanical stop for position tuning, not a force or speed controller. It does not lock the piston rod in place; if air pressure is lost, the load will not be held and an external lock or pilot-operated check valve is required for load holding.
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