The AirTAC SCJ80 Standard Cylinder SCJ80X100-50FA is a genuine double-acting DOUBLE-ROD air cylinder whose rear rod carries the stroke ADJUSTER: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø80mm bore, 100mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X100-50FA is an 80 mm bore double-acting double-rod cylinder with a field-adjustable stroke end, allowing you to fine-tune the piston's stop position by up to 50 mm without removing the cylinder.
This model comes with a front rectangular flange (FA) for rigid panel or end-face mounting, and the standard TPU seals suit ambient temperatures from -20 to +70 °C. The 25 mm diameter piston rod, PT3/8 port, and 28 mm air cushion ensure smooth deceleration, while the tie-rod construction keeps service straightforward.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X100-50FA |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (double 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 adjuster on the rear rod sets the stroke end position. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 kgf | |
SCJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative), lower than a single-rod SC push of the same bore. 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. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -50 | 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 50 mm adjust range lets technicians precisely set the end-of-stroke position for grippers, clamps, or pushers without fabricating custom hard stops, saving hours of mechanical setup time.
On packaging or sorting lines, operators can quickly re-adjust the stroke to handle different product sizes or box dimensions, minimizing downtime between production runs.
In pressing or forming operations, the stroke can be incrementally extended over time to compensate for tooling wear, maintaining consistent contact pressure without replacing the cylinder.
The front flange mount (F-SC80FA) is ideal when the cylinder body must be secured against a bulkhead.
For a direct replacement, match the 80 mm bore, 100 mm nominal stroke, 50 mm adjust range, PT port thread, and FA mounting. If the application involves significant side loading, especially with this 100 mm stroke, consider an external guide rail or a guided cylinder to protect the rod and bearings from bending moments.
Adjustable-stroke checklist
The maximum push force at 0.9 MPa is 4523 N. Note that as a double-rod cylinder, the push force is always greater than the pull force due to the rod area.
A rear-cap adjusting screw lets you shorten the stroke end by up to 50 mm from the nominal 100 mm maximum. Pick the SCJ over a fixed SC when you anticipate needing to fine-tune the stroke position during commissioning, for format changes, or to take up mechanical wear, as it eliminates the need to swap cylinders or add external stops.
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