The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X75-20FA 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 SCJ80X75-20FA is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. Its rear-cap adjusting screw provides up to 20 mm of stroke shortening, allowing fine-tuning of the piston's end position without swapping the cylinder. With an 80 mm bore, it delivers a push force of 2513 N at 0.5 MPa, making it suitable for medium-duty positioning and clamping tasks.
This model features an FA front rectangular flange for direct panel or end-face mounting (bracket code F-SC80FA). The 25 mm diameter piston rod and PT3/8 ports ensure robust flow and mechanical strength. The cylinder body length A(SCJ) is 239 mm, and it includes an adjustable air cushion to decelerate the piston smoothly at the end of its travel.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X75-20FA |
|---|---|
| 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.
The 20 mm adjustment screw lets technicians fine-tune the end-stop position during initial machine setup, compensating for assembly tolerances without needing to modify the cylinder or add external hard stops.
In packaging or labeling machinery, the stroke can be quickly adjusted to accommodate different product sizes or box heights, reducing changeover time between production runs.
In pressing or clamping applications, the adjustable stroke end can be used to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent clamping pressure without replacing parts.
Choose this 80 mm bore when the 63 mm bore's 1559 N push force at 0.5 MPa is insufficient, but the 100 mm bore's 3927 N is excessive for your application. The 20 mm adjustable stroke range is ideal for commissioning trials where the final stop position needs to be dialled in on the machine. If your stroke length is fixed and will never need adjustment, a standard SC80X75 cylinder is a simpler alternative.
For a direct replacement, match the SCJ80 bore, 75 mm nominal stroke, 20 mm adjust range, FA front flange mount, and PT port thread. The front flange mounting is designed for rigid, perpendicular mounting to a machine panel. For strokes of this length, ensure the load is guided to prevent excessive side-loading and rod bending; if side forces are present, consider an external guide rail or a guided cylinder.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The push force is higher because the single-rod design means air pressure acts on the full bore area during extension, but the rod area reduces the effective area during retraction. At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N.
You can replace a fixed-stroke SC80 with this SCJ80X75-20FA only if you need the adjustable stroke feature and the 75 mm nominal stroke with a 20 mm adjustment range matches your requirements. The SCJ body is slightly longer to accommodate the adjusting screw. Ensure your mounting interface matches the FA front flange and the port thread is PT. If you need a direct dimensional drop-in for a fixed-stroke SC, the SC series is the correct match.
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.