The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X300-40TC 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, 300mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X300-40TC is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, offering a 40mm adjustment range via a rear-cap screw. With an 80mm bore, it delivers a substantial 2513 N of push force at 0.5 MPa, scaling up to 4523 N at its maximum operating pressure of 0.9 MPa, making it suitable for medium-to-heavy material handling and positioning tasks.
This model features a centre trunnion (TC) mount, supplied with the TCM1 bracket (order code F-SC80TC), which allows the cylinder to pivot and is ideal for swinging or articulating machine sections. The 25mm diameter piston rod and 28mm air cushion at each end ensure robust, decelerated motion control for the 300mm nominal stroke.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X300-40TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 300 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. |
| ×300 | 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.
Quickly adjust the end-stop for different product sizes on packaging or filling lines by turning the rear screw, without needing to re-program servo drives or swap out hard stops.
Fine-tune the open and closed positions of a material diverter gate on a conveyor. The 40mm adjustment range allows operators to compensate for wear or align with new chute positions.
Set a precise, repeatable clamp depth for a glue press or assembly fixture. The 4523 N of force at 0.9 MPa provides a powerful hold, while the screw prevents over-travel.
Choose the SCJ80 series when you need the force of an 80mm bore (2513 N push at 0.5 MPa) and the ability to fine-tune the stroke end without changing the cylinder. If your application requires less force, step down to the 63mm bore (1559 N push at 0.5 MPa); for more force, the 100mm bore provides 3927 N. The adjustable stroke is a key differentiator from a fixed-stroke SC cylinder, which is a better pick if your stroke length is permanently fixed.
For a 300mm stroke, be mindful of side-loading. The rod should be guided externally if the load is not perfectly axial, or consider a guided cylinder to prevent rod bending and premature seal wear. As a direct replacement, match the SCJ80 bore, 300mm nominal stroke, 40mm adjust range, PT port thread, and TC centre trunnion mount.
Adjustable-stroke checklist
The theoretical push force at 0.5 MPa is 2513 N, and the pull force is 2268 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 4523 N. These forces are identical to a fixed-stroke SC80 cylinder.
Yes, this is a direct replacement for any AirTAC SCJ80 cylinder with a 300mm nominal stroke and a 40mm adjustment range. Ensure your mounting matches the TC centre trunnion style and that the port thread is PT. The stroke adjust screw sets the end position, not the force.
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