The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X40-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø80mm bore, 40mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X40-40 is a double-acting, single-rod pneumatic cylinder that puts fine stroke-end adjustment at your fingertips. With an 80 mm bore and a 40 mm nominal stroke, its rear-cap adjusting screw lets you shorten the effective stroke by up to 40 mm without removing the cylinder from the machine. This model delivers a substantial 2513 N of push force at 0.5 MPa, driven by a 25 mm diameter piston rod, making it a powerful choice for medium-to-heavy industrial tasks.
Built on a robust tie-rod construction, the SCJ80X40-40 features a PT3/8 port, an M20x1.5 rod thread, and a 28 mm air cushion for smooth deceleration. The body length A is 239 mm, providing a compact footprint for its force class. This adjustable-stroke design is ideal for commissioning trials, format changeovers, or taking up mechanical wear, allowing operators to dial in the exact end position needed for consistent, reliable automation.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X40-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 40 mm |
| Stroke adjustment | Up to 40 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. |
| ×40 | Nominal (maximum) stroke length in mm. |
| -40 | 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.
Perfect for machine builders who need to precisely dial in an end-stop position during initial setup. The 40 mm adjustment range allows for quick, tool-free tweaking to achieve perfect alignment with mating parts, eliminating the need to fabricate custom shims or external hard stops.
Ideal for end-of-line palletising or stopping stations where a physical stop may wear over time. The rear adjusting screw can be easily advanced to take up the slack, maintaining precise positioning without replacing the entire cylinder or mechanical stop, reducing downtime.
Suited to packaging or assembly machines that handle multiple product sizes. When changing formats, an operator can quickly adjust the SCJ80X40-40's stroke end to match a new box height or component position, drastically cutting changeover time compared to swapping fixed-stroke cylinders.
Select the SCJ80X40-40 when your application demands a powerful, field-tunable stroke end. If 2513 N of push force at 0.5 MPa is more than required, stepping down to a 63 mm bore (SCJ63) reduces push force to 1559 N, saving energy and space. For applications needing a higher force, the 100 mm bore (SCJ100) provides 3927 N. If your process does not require stroke adjustability, a fixed-stroke SC80 cylinder offers a simpler, more cost-effective solution. For precise, multi-stop positioning, consider an SCT multi-position cylinder instead.
A direct replacement must match the SCJ80 bore, the 40 mm nominal stroke, and the 40 mm adjustable range. Ensure the replacement unit has the same PT3/8 port thread and basic mounting style. This model is a standard stroke length, well within the 1500 mm maximum for the 80 mm bore.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. The pull force is lower due to the area of the 25 mm piston rod. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 5026 N.
A rear-cap adjusting screw physically limits how far the piston can retract, shortening the stroke end by up to 40 mm on this model. It is a mechanical stop for position, not a flow control. To adjust piston speed, you must use external flow control valves fitted to the cylinder's PT3/8 ports.
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