The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X30-20 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, 30mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X30-20 delivers a robust 2513 N of push force at 0.5 MPa, making it a strong choice for compact stations needing a fine-tuned end position. Its rear adjusting screw provides up to 20 mm of stroke-end reduction, allowing operators to dial in the exact stopping point without swapping the cylinder or adding external hard stops.
This double-acting, single-rod cylinder features a 25 mm rod diameter and PT3/8 ports. The tie-rod construction includes an adjustable air cushion for smooth deceleration, with a cushion length of 28 mm. The body length for this SCJ80 series is 239 mm, accommodating the rear adjustment mechanism.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X30-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 30 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. |
| ×30 | 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 20mm screw adjustment lets technicians precisely set the actuator's end stop to match tooling or fixture positions without mechanical rework.
In high-cycle pusher stations, the adjustable stroke can be tweaked over time to compensate for material build-up or pad wear, maintaining consistent part placement.
Quickly adapt the stroke end for different product sizes on a packaging line by turning the rear screw, eliminating the need to swap cylinders for short-run format changes.
Choose the SCJ80X30-20 when you need a field-adjustable stroke end on a compact 30 mm throw. If the 2513 N push force at 0.5 MPa is insufficient, stepping up to the 100 mm bore provides 3927 N. For applications where the stroke length is fixed and never needs field tuning, the standard SC80 fixed-stroke cylinder is a simpler, more cost-effective alternative. A direct replacement must match the 80 mm bore, 30 mm nominal stroke, 20 mm adjustment range, PT port thread, and basic mounting style.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder produces 2513 N of push force and 2268 N of pull force. The maximum push force at the 0.9 MPa operating limit is 4523 N. The pull force is lower because the 25 mm rod reduces the effective piston area on the retract side.
A screw in the rear cap acts as an internal, adjustable end stop for the piston. Turning the screw shortens the stroke end by up to 20 mm from the 30 mm nominal maximum. It sets the physical stopping point and does not regulate air pressure or speed.
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