The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X30-30 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, 30mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X30-30 is an 80 mm bore double-acting single-rod cylinder that puts field-adjustable stroke control directly on the machine. Its rear-cap adjusting screw lets you shorten the stroke end by up to 30 mm, so the effective stroke is tunable from 0 to 30 mm without removing the cylinder or adding external hard stops. The 25 mm diameter piston rod and PT3/8 ports deliver 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa.
This tie-rod cylinder uses an adjustable air cushion (28 mm length) for smooth end-of-stroke deceleration and operates on 40 µm filtered air from 0.15 to 1.0 MPa. The SCJ body length A is 239 mm, slightly longer than a fixed-stroke SC of the same bore to house the adjustment mechanism. Standard speed range is 30-800 mm/s, and the temperature window is -20 to +70 °C with the default TPU seals.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X30-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 30 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. |
| ×30 | 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.
During machine bring-up, the -30 mm adjust screw lets technicians dial in the exact stroke end position for gripper close, clamp engagement, or ejector depth without fabricating new stops or swapping cylinders.
On packaging or assembly lines running multiple product sizes, operators can quickly reset the stroke end for different box heights, pallet widths, or component thicknesses using only a wrench on the rear cap screw.
In high-cycle pressing or clamping stations, the adjustable stroke end takes up mechanical wear in tooling or seals over time, maintaining consistent contact force and part quality without replacing the actuator.
Step up to the 100 mm bore SCJ if you need 3927 N push at 0.5 MPa; step down to the 63 mm bore for 1559 N when space or force requirements are lower. The SCJ is the right pick when you need to fine-tune the stroke end position during commissioning, format changes, or wear take-up—if your stroke is fixed and never needs field adjustment, the standard SC fixed-stroke cylinder is a simpler, lower-cost alternative. For a drop-in replacement, match an AirTAC SCJ80 cylinder with a 30 mm nominal stroke, a -30 adjust range, PT3/8 ports, and the same basic mounting configuration. For strokes of 300 mm or more, evaluate side-loading and rod buckling; an external guide rail or a guided cylinder may be required.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder produces 2513 N pushing and 2268 N pulling (the pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke). At the maximum operating pressure of 0.9 MPa, push force reaches 4523 N. The theoretical maximum at 1.0 MPa is 513 kgf.
A rear-cap adjusting screw sets the stroke end position within a 30 mm range; the nominal 30 mm stroke is the maximum. This lets you fine-tune the stopping point on the machine. Choose SCJ when you need field-adjustable stroke for commissioning, format changes, or wear take-up. Choose the fixed-stroke SC when the stroke is permanently set and you want a simpler, lower-cost cylinder.
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