The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X500-75S 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, 500mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X500-75S is an 80mm bore double-acting single-rod cylinder with a rear-cap adjusting screw providing up to 75mm of field-adjustable stroke reduction. Operating on filtered air at 0.15-1.0 MPa, it delivers a substantial 2513 N push force at 0.5 MPa, making it suitable for medium-duty positioning and clamping applications where the end-stop must be fine-tuned during commissioning or changeover.
This model features a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors, enabling precise end-of-stroke detection without external brackets. The 25mm diameter piston rod and PT3/8 ports handle robust flow rates, while the 28mm adjustable air cushion at each end decelerates the piston smoothly. The body length A is 239mm, and the standard TPU seals provide reliable operation from -20 to +70°C.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X500-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 500 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. |
| ×500 | 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 75mm adjustment range lets technicians dial in the exact stroke end position during machine commissioning without machining custom stops, speeding up line bring-up.
On packaging or assembly lines, the stroke can be quickly reset to accommodate different product sizes or pallet dimensions, reducing downtime between production runs.
In clamping or pressing fixtures, the adjusting screw can be advanced to take up mechanical wear in tooling or contact surfaces, maintaining consistent clamp force over time.
Select the SCJ80X500-75S when you need a 500mm nominal stroke with up to 75mm of on-machine adjustment, avoiding the need to swap cylinders for minor stroke changes. If your force requirement is lower, the 63mm bore SCJ63 delivers 1559 N push at 0.5 MPa and is more compact; for higher force, the 100mm bore SCJ100 provides 3927 N push at the same pressure. For applications where the stroke is fixed and never needs field adjustment, a standard SC80X500 fixed-stroke cylinder is a simpler and more cost-effective choice.
At a 500mm stroke, be mindful of side-loading on the 25mm rod. If the load is not guided externally, rod deflection can accelerate seal wear. Use an external guide rail or consider a guided cylinder for long-stroke, unguided loads. For direct replacement, match an SCJ80X500-75S with PT ports, basic mounting, and the -S magnet option.
Adjustable-stroke checklist
At 0.5 MPa air pressure, the cylinder produces 2513 N of push force and 2268 N of pull force. The maximum push force at the 0.9 MPa operating limit is 4523 N. The adjustable stroke screw does not alter the cylinder's force output.
A screw in the rear end cap sets the retracted stroke end position. You can shorten the effective stroke by up to 75mm from the 500mm nominal maximum. This is a mechanical end-stop adjustment, not a force or speed control, and it does not lock the piston in place when air pressure is removed.
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