The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X20-20S 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, 20mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X20-20S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, delivering 2513 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides up to 20 mm of stroke-end reduction, letting you fine-tune the piston stop on the fly without swapping the cylinder or adding external hard stops. The 25 mm diameter piston rod and PT3/8 ports suit compact automation tasks requiring precise, repeatable end-position control.
This model includes a built-in magnet, so standard CMSG/DMSG/EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for non-contact position sensing. The body length A(SCJ) is 239 mm, and the adjustable air cushion decelerates the piston smoothly at stroke end. Operating pressure spans 0.15–1.0 MPa, with a proof pressure of 1.5 MPa, making it a robust choice for commissioning trials and frequent format changeovers.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X20-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 20 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. |
| ×20 | 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.
Fine-tune the end stop during machine commissioning without removing the cylinder. The 20 mm adjustment range allows operators to quickly dial in the exact stroke needed for new tooling.
In high-cycle packaging lines, use the rear screw to compensate for gripper pad wear. The 2513 N push force at 0.5 MPa handles demanding pick-and-place tasks while maintaining precise end-position.
Switch between product sizes on a single machine by adjusting the cylinder stroke end. The built-in magnet allows sensors to confirm the new position, enabling a fast, repeatable changeover process.
Choose the SCJ80X20-20S when you need to dial in a short, precise stroke end position and want sensor feedback. If your force requirement is lower, stepping down to the 63 mm bore (1559 N push at 0.5 MPa) reduces air consumption and footprint; for higher force, the 100 mm bore delivers 3927 N. This adjustable-stroke cylinder is ideal for applications where the stroke length must be tuned during setup or after wear. If your application demands a fixed, non-adjustable stroke, the standard SC80 series is a simpler, more cost-effective alternative. For a direct replacement, match an AirTAC SCJ cylinder with an 80 mm bore, 20 mm nominal stroke, 20 mm adjust range, PT ports, basic mounting, and the -S magnet option.
Adjustable-stroke checklist
The push force is 2513 N at 0.5 MPa and 4523 N at the maximum operating pressure of 0.9 MPa. The pull force is 2268 N at 0.5 MPa, as the 25 mm rod reduces the effective piston area on the retract stroke.
No. The SCJ80X20-20S does not have a locking mechanism; the piston will drift or drop if air pressure is lost or the valve is centered. The adjustable screw only sets the stroke end position. For load holding without live pressure, you must add an external rod lock or a pilot-operated check valve.
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