The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X300-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø80mm bore, 300mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X300-100S is an 80 mm bore double-acting single-rod cylinder with a field-adjustable stroke end, offering up to 100 mm of adjustment range via a rear-cap screw. At 0.5 MPa, it delivers 2513 N of push force and 2268 N of pull force, making it a strong choice for mid-range pneumatic tasks that need precise end-position tuning without swapping hardware.
This model includes a built-in magnet (-S), allowing CMSG/DMSG/EMSG sensors to be clamped directly onto the tie-rod barrel for reliable end-of-stroke detection. The 25 mm piston rod, PT3/8 ports, and 28 mm air cushion provide smooth deceleration, while the 239 mm body length (A dimension) keeps the package compact for its 300 mm nominal stroke.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X300-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 100 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. |
| ×300 | Nominal (maximum) stroke length in mm. |
| -100 | 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, the 100 mm adjustment screw lets technicians dial in the exact end-stop position for a clamp or ejector without re-plumbing or changing the cylinder, speeding up the commissioning process.
In high-cycle conveyor stops, mechanical wear shifts the stopping point over time. The adjustable stroke compensates for this wear in seconds, maintaining precise part positioning without downtime for shimming.
A packaging machine running different box sizes can use the SCJ80X300-100S to adjust the push stroke for each format. Operators simply turn the rear screw to the marked setting, eliminating manual change parts.
Choose the SCJ80X300-100S when you need to fine-tune the stroke end during commissioning or format changes on an 80 mm bore platform. If your force requirement is lower, stepping down to the 63 mm bore reduces push force to 1559 N at 0.5 MPa; for higher force, the 100 mm bore provides 3927 N. A fixed-stroke SC cylinder is a better pick if the stroke length will never need adjustment, as it has a slightly shorter overall body length.
At a 300 mm nominal stroke, rod bending under side load becomes a consideration. If the load is not guided externally, add an external guide rail or switch to a guided cylinder to protect the rod and seals. For direct replacement, match an SCJ80 cylinder with a 300 mm nominal stroke, 100 mm adjust range, PT ports, and the -S magnet option.
Adjustable-stroke checklist
The push force is 2513 N at 0.5 MPa and 4523 N at the maximum operating pressure of 0.9 MPa. The pull force is slightly lower at 2268 N at 0.5 MPa due to the 25 mm piston rod reducing the effective piston area on the return stroke.
A rear-cap screw limits the retract stroke end, giving you up to 100 mm of adjustment from the 300 mm nominal maximum. It is a mechanical end-stop, not a locking device. If air pressure is lost, the cylinder will not hold its position; an external rod lock or pilot-operated check valve is required for load holding.
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