The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X500-20 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, 500mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X500-20 is an 80 mm bore double-acting single-rod cylinder with a rear-cap adjusting screw that provides up to 20 mm of field-adjustable stroke-end reduction. At 0.5 MPa it delivers 2513 N push and 2268 N pull, making it a strong mid-range actuator for applications that need a 500 mm nominal stroke with on-machine fine-tuning capability.
Its 25 mm diameter piston rod, PT3/8 ports, and 28 mm built-in air cushion handle deceleration smoothly. The tie-rod body has an A dimension of 239 mm plus stroke, so the assembly remains compact for its force class. The screw only sets the stroke end position; it does not alter bore diameter, output force, or the cylinder's 30-800 mm/s speed range.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X500-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 500 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. |
| ×500 | 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 build, dial in the exact 500 mm stroke end with the rear screw. Adjust up to 20 mm without dismounting the cylinder or machining external hard stops.
On packaging or assembly lines, quickly reset the stroke end when switching product sizes. The 20 mm range covers common tooling offsets without swapping the actuator.
In high-cycle clamping or pressing stations, take up mechanical wear or seal compression over time by advancing the stroke end with the adjusting screw, maintaining consistent contact.
Choose this SCJ80X500-20 when you need a half-metre stroke that can be trimmed by up to 20 mm during commissioning or changeovers. If your force requirement grows, stepping up to the 100 mm bore delivers 3927 N push at the same 0.5 MPa. For applications that never need stroke adjustment, the fixed-stroke SC80X500 saves the rear screw mechanism. At 500 mm stroke, ensure the rod is guided externally or use a guided cylinder if the load applies significant side force, to prevent rod bending.
For a direct replacement, match an AirTAC SCJ cylinder with 80 mm bore, 500 mm nominal stroke, a 20 mm adjust range, PT3/8 ports, basic mounting, and no magnet. The SCJ mounting subset includes FA front flange, LB foot, and TC centre trunnion with TCM1 bracket; no FB flange or clevis mounts are available on this series.
Adjustable-stroke checklist
At 0.5 MPa, push force is 2513 N and pull force is 2268 N (pull is lower due to the 25 mm rod area). At the maximum operating pressure of 0.9 MPa, push reaches 4523 N. The theoretical force at 1.0 MPa is 513 kgf.
Yes, if the additional rear screw length fits your space. The SCJ body is slightly longer than the fixed-stroke SC. You must match the 80 mm bore, 500 mm nominal stroke, PT3/8 ports, and your existing mounting style (basic, FA, LB, or TC). The SCJ does not support FB flange or CA/CB clevis mounts.
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