The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X60-75 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, 60mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X60-75 is an 80 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. Its rear-cap adjusting screw provides a 75 mm range to shorten the nominal 60 mm stroke, giving machine builders a quick way to fine-tune the end position during commissioning or format changes without swapping the cylinder. The 25 mm piston rod and PT3/8 ports deliver a push force of 2513 N at 0.5 MPa, rising to 4523 N at the 0.9 MPa maximum operating pressure.
This tie-rod cylinder has a body length A of 239 mm and an adjustable air cushion to decelerate the piston smoothly. The operating temperature range is -20 to +70 °C with the standard TPU seal. The stroke-adjust screw only sets the mechanical stroke end; it does not alter the cylinder's force output or speed. For position sensing, a magnet-equipped variant (-S suffix) is available to accept CMSG/DMSG sensors.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X60-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 60 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. |
| ×60 | 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 rear adjuster lets technicians dial in the exact stroke end position on a new machine without cutting brackets or adding external hard stops, speeding up factory acceptance testing.
On a packaging line running multiple box sizes, the adjustable stroke allows operators to quickly reset the pusher stroke end for a new format, minimizing downtime between batches.
In clamping or pressing fixtures, the stroke can be extended slightly over time to compensate for tooling wear or pad compression, maintaining consistent clamp force without replacing the cylinder.
Choose the SCJ80 when you need a robust mid-range force of 2513 N push at 0.5 MPa and the ability to dial in the stroke end on the machine. If your force requirement is lower, stepping down to a 63 mm bore reduces push force to 1559 N at 0.5 MPa; for higher force, the 100 mm bore provides 3927 N. The 75 mm adjustment range on this model is ideal for applications where the exact end position is unknown at the design stage or needs to be changed periodically.
A fixed-stroke SC80 cylinder is a simpler, lower-cost choice if the stroke never needs adjustment. This SCJ80X60-75 is a direct replacement for another AirTAC SCJ80 cylinder with a 60 mm nominal stroke, 75 mm adjust range, PT ports, and basic mounting. For strokes of 300 mm or more, evaluate the side load on the 25 mm rod and consider adding an external guide or switching to a guided cylinder to prevent rod bending.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force (the pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke). At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N.
It can replace a fixed-stroke cylinder of the same 80 mm bore if you need the 75 mm stroke-end adjustment feature and the 60 mm nominal stroke is sufficient. You must match the port thread (PT), mounting style, and ensure the slightly longer body length A of 239 mm fits your machine. If you need a simple drop-in for a fixed-stroke SC80, the standard SC series is a more direct match.
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