The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X75-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø80mm bore, 75mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X75-20 is a double-acting, single-rod pneumatic cylinder with a 20 mm rear adjusting screw, letting you fine-tune the stroke end position on the fly. With an 80 mm bore, it delivers a substantial 2513 N of push force at just 0.5 MPa, making it a workhorse for medium-to-heavy industrial tasks that need a precise, repeatable end stop without swapping the cylinder.
This model uses a 25 mm diameter piston rod and PT3/8 ports, with a total body length of 239 mm (A dimension). The adjustable cushion provides smooth deceleration, and the 20 mm adjustment range is ideal for commissioning tweaks or taking up mechanical wear. It's a genuine AirTAC component built for reliable, long-life service.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X75-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 75 mm |
| Stroke adjustment | Up to 20 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. |
| ×75 | Nominal (maximum) stroke length in mm. |
| -20 | 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.
Engineers can precisely dial in the actuator's end stop during initial machine setup without needing to fabricate custom shims or hard stops, speeding up the commissioning process.
In high-cycle material handling, mechanical stops can wear. The SCJ's screw allows operators to quickly compensate for this wear, maintaining precise positioning without disassembling the machine.
Ideal for packaging or assembly lines that run multiple product sizes. The 20 mm adjustment range allows a quick mechanical change to the stroke end to accommodate different box heights or part profiles.
Choose the SCJ80X75-20 when you need the 2513 N push force of an 80 mm bore but require the ability to dial in the exact stroke end. If your force requirement drops, the 63 mm bore SCJ63 series offers 1559 N of push at 0.5 MPa in a smaller package. For applications demanding a fixed, non-adjustable stroke, the standard SC80 series is a simpler alternative. This cylinder is a direct replacement for any AirTAC SCJ80X75-20 with PT ports and basic mounting. For strokes of 300 mm or more, consider an external guide to protect the 25 mm rod from side loads.
Adjustable-stroke checklist
A screw in the rear cap acts as an internal, adjustable end stop for the piston. Turning the screw changes the retracted stroke end position by up to 20 mm, allowing you to shorten the effective stroke from the nominal 75 mm maximum. It does not change the cylinder's force or speed.
At the standard 0.5 MPa operating pressure, the push force is 2513 N and the pull force is 2268 N. The pull force is lower due to the area of the 25 mm piston rod. At the maximum 0.9 MPa pressure, the push force reaches 4523 N.
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