The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X75-30STC 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, 75mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X75-30STC is an 80 mm bore, single-rod double-acting pneumatic cylinder that puts field-adjustable stroke control directly on the machine. Its rear-cap screw lets you shorten the stroke end by up to 30 mm without removing the cylinder, so commissioning teams and maintenance staff can dial in the exact stop position for an 80-bore workhead that delivers 2513 N of push force at 0.5 MPa.
This variant is factory-built with a built-in magnet (-S) and a centre trunnion mount (TC) that ships with the TCM1 bracket, making it ready to pivot under swinging or articulating loads. The 25 mm piston rod and PT3/8 ports handle air filtered to 40 µm, and the 28 mm air cushion decelerates the piston smoothly at each end of the 75 mm nominal stroke.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X75-30STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 75 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. |
| ×75 | 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.
The TC centre trunnion lets the cylinder swing as it extends, and the 30 mm screw fine-tunes the gate’s closed position against the chute wall, compensating for seal wear or product buildup over time.
Dial in the exact clamp standoff for different workpiece thicknesses without swapping cylinders. The 2513 N push force at 0.5 MPa holds parts firmly, and the magnet confirms full extension via a barrel-mounted sensor.
During durability or functional testing, engineers can shorten the 75 mm stroke by up to 30 mm to replicate different load-cell engagement depths, all without reprogramming the PLC or adding hard stops.
Choose this 80 mm bore when your application needs roughly 2513 N of push at standard plant pressure; if that is too high, the 63 mm bore SCJ delivers 1559 N push at the same 0.5 MPa. The 30 mm adjustable range is ideal for format changeovers or wear take-up on a pivoting linkage, but if your stroke never needs field tweaking, a fixed-stroke SC80 with the same TC mount is a simpler, lower-cost alternative. For replacement, match an SCJ80 with a 75 mm nominal stroke, the -30 adjust range, PT3/8 ports, the F-SC80TC centre trunnion kit, and the -S magnet for CMSG/DMSG/EMSG sensors.
Adjustable-stroke checklist
At 0.5 MPa the cylinder produces 2513 N pushing and 2268 N pulling because the single rod reduces the piston area on the return side. At the maximum operating pressure of 1.0 MPa, push force reaches 5026 N. Always size for the lower pulling force if the return stroke does work.
Yes, provided the original unit is an AirTAC SCJ80 with a 75 mm nominal stroke, -30 adjust range, PT3/8 ports, centre trunnion mounting (F-SC80TC), and a magnet for sensors. The SCJ is a tie-rod cylinder, so dimensional interchangeability is limited to another AirTAC SCJ of the same configuration.
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