The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X600-20 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, 600mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X600-20 is an 80 mm bore double-acting, single-rod pneumatic cylinder with a 20 mm field-adjustable stroke range, letting you dial in the exact stroke end position during commissioning or changeovers. At 0.5 MPa it delivers 2513 N push and 2268 N pull, while at the maximum operating pressure of 0.9 MPa the push force climbs to 4523 N.
This tie-rod cylinder uses a 25 mm diameter piston rod with an M20x1.5 male knuckle thread and PT3/8 ports. The rear-cap adjusting screw shortens the nominal 600 mm stroke by up to 20 mm, and the 28 mm air cushion decelerates the piston at both ends. The body length A dimension is 239 mm and the unit is rated for 0.15–1.0 MPa with a speed range of 30–800 mm/s.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X600-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 600 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. |
| ×600 | 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.
During machine setup, the 20 mm adjusting screw lets technicians fine-tune the exact stroke end position without fabricating shims or moving external stops, cutting commissioning time on packaging and assembly lines.
On multi-product conveyors or diverters handling different box sizes, operators can quickly adjust the cylinder stroke to match the new product width, avoiding the need to stock multiple fixed-stroke cylinders.
In clamping or pressing fixtures where tooling or pads wear over time, the adjustable stroke end compensates for the lost travel, maintaining consistent contact force without replacing the cylinder or re-machining stops.
Choose the SCJ80 when you need the 80 mm bore force class—2513 N push at 0.5 MPa. If your load requires more force, step up to the 100 mm bore SCJ100 which provides 3927 N push at the same pressure; if space or weight is tight, the 63 mm bore SCJ63 delivers 1559 N push. All three share the same PT1/4 port (SCJ63) or PT3/8 port (SCJ80/100) and the same adjustable-stroke concept.
For a 600 mm stroke, rod buckling and side-load become practical concerns. If the load is not guided externally, consider adding an external guide rail or switching to a guided cylinder. This SCJ80X600-20 replaces any AirTAC SCJ80 with a 600 mm nominal stroke and 20 mm adjust range, matching PT ports and basic mounting. If you need a fixed stroke with no adjustment, the standard SC series is a simpler alternative.
Adjustable-stroke checklist
At 0.5 MPa, push force is 2513 N and pull force is 2268 N (pull 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, push force reaches 4523 N. Always size for the pull force if the cylinder does work in both directions.
Yes, provided the bore (80 mm), port thread (PT3/8), and mounting style match. The SCJ body is slightly longer than the fixed-stroke SC due to the rear adjusting mechanism, so verify the available envelope. The adjustable screw shortens the stroke end by up to 20 mm from the nominal 600 mm maximum.
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