The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X85-75N 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, 85mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X85-75N is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, offering a substantial 75 mm of end-position tuning on its 85 mm nominal stroke. This model delivers a push force of 2513 N at 0.5 MPa and features a 25 mm diameter piston rod, an M20x1.5 rod thread, and a PT3/8 port, making it a robust choice for applications needing fine mechanical setup.
Built with NBR (nitrile) seals, this cylinder is a durable workhorse for general industrial environments. The rear-cap adjusting screw allows operators to precisely dial in the stroke end without dismounting the unit, ideal for commissioning new tooling or compensating for process drift. The tie-rod construction houses a 28 mm air cushion for smooth deceleration.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X85-75N |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 85 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. |
| ×85 | 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.
The 75 mm adjustment range allows engineers to fine-tune the actuator's end-stop during machine setup without swapping out hard stops or changing the cylinder, drastically reducing commissioning time.
In clamping or pressing operations, the adjustable stroke can be periodically tweaked to compensate for tooling wear or material thickness variations, maintaining consistent process quality over long production runs.
For packaging or assembly lines that handle multiple product sizes, the rear screw provides a quick, repeatable way to adjust the cylinder's stroke for a new format without needing to re-plumb or replace the actuator.
This 80 mm bore model, with its 2513 N push force at 0.5 MPa, is a mid-range workhorse. If your force requirement is lower, stepping down to the 63 mm bore (1559 N push) can reduce air consumption and physical size. For applications needing a fixed, non-adjustable stroke, the standard SC series is a more economical choice, while a guided cylinder should be considered if the rod must support significant side loads.
A direct replacement must match the 80 mm bore, 85 mm nominal stroke, and the full 75 mm adjustment range. It requires an SCJ series cylinder with NBR seals and PT ports. This basic configuration uses no mounting bracket, but foot (LB) or trunnion (TC) mounts can be added using the F-SC80 series accessories.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The maximum push force at 0.9 MPa is 4523 N. The pull force is lower due to the area of the 25 mm piston rod.
A screw in the rear end-cap acts as an adjustable internal stop for the piston. Turning the screw changes the stroke's end position by up to 75 mm. It sets the mechanical limit of the piston's travel but does not lock the rod in place or hold a load when air pressure is removed.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.