The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X75-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø80mm bore, 75mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X75-75 is a double-acting, single-rod pneumatic cylinder from AirTAC, engineered with a rear-cap adjusting screw that provides a full 75 mm of field-adjustable stroke-end control. With an 80 mm bore and a 25 mm piston rod, it delivers a push force of 2513 N at 0.5 MPa, making it a robust choice for applications requiring precise end-position tuning without replacing the cylinder.
This tie-rod cylinder features a PT3/8 port, an M20x1.5 rod thread, and a 28 mm air cushion for smooth deceleration. The body length A(SCJ) is 239 mm, accommodating the adjustable mechanism. Its operating pressure ranges from 0.15 to 1.0 MPa, with a maximum push force of 4523 N at 0.9 MPa, suitable for tasks where the stroke end must be dialed in during commissioning or changeovers.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X75-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 75 mm |
| Stroke adjustment | Up to 75 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. |
| -75 | 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 commissioning, the 75 mm rear adjuster allows engineers to precisely dial in the stroke end for grippers or clamps without modifying hard stops, saving hours of mechanical rework.
On packaging lines, the adjustable stroke enables rapid format changes for different box sizes. Operators can quickly reset the pusher stroke end from the rear cap, minimizing downtime between product runs.
In high-cycle assembly fixtures, the 75 mm adjustment range can be used to compensate for pad or tooling wear over time. The stroke end is simply extended to maintain consistent contact pressure without replacing the cylinder.
Select the SCJ80X75-75 when you need to fine-tune the stroke end position within a 75 mm window, a capability fixed-stroke SC cylinders lack. If the 2513 N push force at 0.5 MPa is insufficient, stepping up to a 100 mm bore provides 3927 N; if it exceeds your need, the 63 mm bore offers 1559 N. For applications requiring a fixed, non-adjustable stroke, the standard SC80 series is a more economical choice.
This model is a direct replacement for another AirTAC SCJ80 adjustable-stroke cylinder with the same 75 mm nominal stroke, 75 mm adjust range, PT3/8 ports, and basic mounting. If your application involves significant side loads, consider an external guide rail or a guided cylinder, as the rod bearing is not designed to support heavy transverse forces.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The maximum push force at the 0.9 MPa operating limit is 4523 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
A screw in the rear cap acts as an adjustable end stop for the piston. Turning the screw changes the stroke end position by up to 75 mm, shortening the nominal 75 mm stroke. It does not adjust the force or speed, only the physical stopping point of the piston rod's extension.
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