The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X300-30STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø80mm bore, 300mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X300-30STC is a double-acting, single-rod pneumatic cylinder that puts field-adjustable stroke control directly on the machine. Its rear-cap adjusting screw provides up to 30 mm of stroke-end reduction, letting you fine-tune the 300 mm nominal stroke during commissioning or changeover without swapping the cylinder. With a 25 mm rod diameter and PT3/8 ports, this unit delivers 2513 N of push force at 0.5 MPa.
This model is factory-configured with a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors and a centre trunnion pivot (TC) that ships with the TCM1 bracket, ideal for swinging loads. The 80 mm bore body has an A dimension of 239 mm and an adjustable air cushion to decelerate the piston smoothly. At the maximum operating pressure of 0.9 MPa, push thrust reaches 4523 N, making it a strong choice for mid-range industrial positioning tasks.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X300-30STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 30 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. |
| -30 | 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 30 mm adjustment screw lets technicians dial in the exact stroke end position for a gripper or pusher without iterative disassembly, speeding up the final alignment of automated work cells.
When a packaging machine switches between box sizes, the stroke can be quickly shortened to match the new carton width. The centre trunnion mount allows the cylinder to pivot, following the changing angle of a folding or sealing mechanism.
In a high-cycle clamping station, the adjustable stroke compensates for gradual wear on contact pads or tooling, maintaining consistent clamp force and position without replacing the actuator or adding shims.
Choose the SCJ80 bore when your application needs roughly 2513 N of push force at standard plant air. If you can drop to 1559 N, stepping down to a 63 mm bore saves space and air consumption; if you need more force, the 100 mm bore provides 3927 N at the same 0.5 MPa. The 300 mm stroke is within the standard range for this bore, but at this extension you must manage side loads carefully—consider an external guide rail or switch to a guided cylinder if the rod sees significant radial force.
For a direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with an 80 mm bore, 300 mm nominal stroke, and a 30 mm adjust range (-30). This unit's TC centre trunnion mount uses the F-SC80TC kit, and the -S magnet is essential if your control system relies on barrel-mounted reed or solid-state sensors. If you never need to alter the stroke after installation, a fixed-stroke SC80X300 with the same mounting and magnet options is a simpler, lower-cost alternative.
Adjustable-stroke checklist
Because it is a single-rod cylinder, push and pull forces are different. At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 5026 N. Always design your circuit using the pull force value for retraction strokes.
Yes, if your existing unit is an AirTAC SCJ80 with a 300 mm nominal stroke and a 30 mm adjust range. You must also match the port thread (PT), the centre trunnion mounting (TC with TCM1 bracket), and the magnet option (-S) for sensor compatibility. The adjustable stroke range must be identical to ensure the machine's end-stop setting remains valid.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.