The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X300-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø80mm bore, 300mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X300-10S is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 10 mm of field-adjustable stroke-end reduction. With an 80 mm bore delivering 2513 N of push force at 0.5 MPa, it is a practical choice for mid-range actuation tasks where the final stop position needs fine-tuning during commissioning or after machine wear.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors on the tie-rod barrel for reliable end-of-stroke detection. The 25 mm diameter piston rod, PT3/8 ports, and 28 mm air cushion length contribute to a robust design, while the body length A(SCJ) of 239 mm provides a compact footprint for its force class.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X300-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 10 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. |
| -10 | 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 10 mm screw adjuster lets technicians dial in the exact stroke end on a new machine without swapping cylinders or machining external hard stops, speeding up factory acceptance tests.
On packaging or assembly conveyors, the stroke can be slightly extended over time to compensate for gripper or pusher pad wear, maintaining consistent product handling without a full cylinder change.
In light pressing or clamping fixtures, operators can quickly adjust the stroke end to accommodate different workpiece thicknesses, reducing changeover time between production batches.
Step up to the 100 mm bore SCJ100X300-10S if your application requires more force, as it delivers 3927 N of push at 0.5 MPa. For tasks needing less force, the 63 mm bore SCJ63X300-10S offers 1559 N. Because the nominal stroke is 300 mm, be mindful of side-loading on the rod; if the load is not guided, consider adding an external linear guide or switching to a guided cylinder to prevent rod bending and premature seal wear. A fixed-stroke SC80X300 cylinder is a simpler alternative if stroke adjustment is not required.
For direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with an 80 mm bore, 300 mm nominal stroke, 10 mm adjust range, PT port thread, basic mounting, and the -S magnet option. The SCJ mounting subset includes FA front flange, LB foot, or TC centre trunnion with TCM1 bracket if a pivoting mount is needed.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N (due to the 25 mm rod reducing the piston area on the return stroke). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N.
A screw in the rear cap mechanically limits how far the piston can retract, shortening the stroke end by up to 10 mm from the nominal 300 mm. It does not adjust force or speed—only the stroke end position. The cylinder must be depressurized before adjustment.
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