The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X275-50S 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, 275mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X275-50S is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw, giving you a 50 mm field-adjustable stroke range on the 275 mm nominal body. At 0.5 MPa, it delivers 2513 N of push force and 2268 N on the pull stroke, driven by a 25 mm diameter piston rod through PT3/8 ports.
This model includes a built-in magnet (-S), so you can directly clamp CMSG, DMSG, or EMSG reed and solid-state sensors onto the tie-rod barrel for precise end-of-stroke or mid-stroke position feedback. The adjustable air cushion decelerates the piston smoothly over the final 28 mm of travel, and the body length A(SCJ) is 239 mm.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X275-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 275 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. |
| ×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.
During machine setup, use the 50 mm rear screw to precisely dial in the stroke end position without remounting the cylinder, speeding up the commissioning process.
On packaging lines, quickly adjust the pusher stroke for different box sizes by turning the rear screw, eliminating the need for mechanical stop changes between production runs.
In clamping or pressing fixtures, the adjustable stroke can be extended slightly over time to compensate for tooling or pad wear, maintaining consistent contact force.
Choose the SCJ80 when your application needs the 2513 N push force available from an 80 mm bore at standard line pressure. If you can accept a lower force of 1559 N, stepping down to a 63 mm bore saves space and air consumption. For applications that do not require stroke-end adjustment, the fixed-stroke SC80 series is a simpler, more cost-effective alternative. This cylinder is a direct replacement for another AirTAC SCJ80 with a 275 mm nominal stroke, 50 mm adjust range, PT ports, and a built-in magnet. For strokes of 300 mm or more, consider an external guide rail or a guided cylinder to protect the 25 mm rod from side-load bending.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the cylinder produces a push force of 2513 N and a pull force of 2268 N. The maximum push force at the 0.9 MPa upper limit is 4523 N.
The rear-cap adjusting screw sets the stroke end position within a 50 mm range. It shortens the nominal 275 mm stroke, allowing you to fine-tune the piston's stopping point in the field without changing the cylinder or adding external hard stops.
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