The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X275-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø80mm bore, 275mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X275-30S is an 80 mm bore double-acting single-rod cylinder with a field-adjustable stroke end, giving you up to 30 mm of fine-tuning range via the rear-cap screw. At 0.5 MPa it delivers 2513 N of push force and 2268 N on the pull stroke, making it a strong mid-range actuator for tasks that need precise end-position setup without swapping hardware.
This model includes a built-in magnet (-S suffix), so CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The 25 mm rod, PT3/8 ports, and 28 mm air cushion help manage deceleration, and the body length A(SCJ) is 239 mm — slightly longer than the fixed-stroke SC of the same bore to house the adjusting mechanism.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X275-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 275 mm |
| Stroke adjustment | Up to 30 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. |
| -30 | 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.
Dial in the exact stop position during machine commissioning without cutting brackets or adding shims. The 30 mm rear screw adjustment lets technicians fine-tune the stroke end in seconds.
Quickly adapt a pusher or diverter for different box or pallet sizes on a packaging line. The adjustable stroke handles multiple formats with one cylinder, reducing changeover time.
Take up mechanical play or seal wear over time by slightly extending the effective stroke. This keeps tooling in the correct position without replacing the actuator.
Choose the SCJ80X275-30S when you need a 275 mm nominal stroke that can be shortened on the machine by up to 30 mm for commissioning or format changes. If your force requirement drops, the 63 mm bore offers 1559 N push at 0.5 MPa; if you need more, the 100 mm bore steps up to 3927 N. For applications that never need stroke adjustment, the fixed-stroke SC80 is a simpler, cost-effective alternative.
At 275 mm stroke, rod bending under side load is a consideration — fit an external guide rail or switch to a guided cylinder if the load is not perfectly axial. For a direct replacement, match an SCJ80 with a 275 mm nominal stroke, 30 mm adjust range, PT3/8 ports, basic mounting, and the -S magnet option.
Adjustable-stroke checklist
At 0.5 MPa the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 0.9 MPa, push force reaches 4523 N. The pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke.
Yes, provided the mounting, port size (PT3/8), and magnet option match. The SCJ body is slightly longer (239 mm) to accommodate the adjusting screw. Ensure the 30 mm adjustment range does not interfere with your machine envelope.
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