The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X75-20TC 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, 75mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X75-20TC is a double-acting, single-rod pneumatic cylinder that puts field-adjustable stroke control directly on the machine. A rear-cap adjusting screw lets you shorten the stroke end by up to 20 mm without removing the cylinder, making it ideal for commissioning trials, format changeovers, or taking up wear on end stops. With an 80 mm bore and 25 mm piston rod, it delivers 2513 N of push force at 0.5 MPa, placing it in a mid-range force class suited to pressing, clamping, and material-transfer tasks.
This model is configured with a centre trunnion (TC) mount, supplied with the TCM1 bracket, which allows the cylinder to pivot and absorb angular misalignment in swinging or articulating linkages. The body length A(SCJ) is 239 mm, and the adjustable air cushion decelerates the piston smoothly at both ends. Ports are PT3/8, and the rod thread is M20x1.5. The standard TPU seal keeps the operating range at -20 to +70 °C.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X75-20TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 75 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. |
| ×75 | 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.
Quickly dial in a new stroke end position when switching between box sizes or product heights, eliminating the need to swap cylinders or add mechanical stops.
Fine-tune the insertion depth of a press tool during setup or after tooling wear, using the rear screw to set the exact end-of-stroke position.
Adjust the retracted position of a material stop or diverter gate on a conveyor to handle different part widths without reprogramming the controller.
Choose the SCJ80 when your application needs roughly 2500 N of push force at standard plant air. If you can step down to a 63 mm bore, the SCJ63 delivers 1559 N push at 0.5 MPa and has a shorter 197 mm body, saving space and air consumption. For higher loads, the SCJ100 jumps to 3927 N push at 0.5 MPa. The 20 mm adjustable range is ideal for fine-tuning the stroke end position; if you need a wider adjustment window, select the -30, -40, or -50 option. When a fixed stroke is sufficient, the standard SC80 cylinder offers the same force in a simpler package. For direct replacement, match an AirTAC SCJ80 with a 75 mm nominal stroke, -20 adjust range, PT3/8 ports, and TC centre trunnion mount.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. Because it is a single-rod cylinder, the pull force is lower due to the 25 mm rod area. At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N.
Yes, provided the mounting style, port thread, and nominal stroke match. The SCJ80 body is slightly longer to house the adjusting screw. For a drop-in replacement, confirm the 239 mm body length A(SCJ) fits your machine envelope and that you are matching an SCJ80 with a 75 mm nominal stroke and -20 adjust range.
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