The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X300-75TC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø80mm bore, 300mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X300-75TC is a double-acting, single-rod pneumatic cylinder that puts a 75 mm field-adjustable stroke range directly into the rear cap, letting you fine-tune the end position without swapping the actuator. With an 80 mm bore and 25 mm rod, it delivers 2513 N of push force at 0.5 MPa and up to 4523 N at 0.9 MPa, making it a strong candidate for medium-to-heavy material handling, pressing, and clamping stations where commissioning adjustments or format changeovers are routine.
This model ships with a centre trunnion (TC) mount and the TCM1 bracket, allowing the cylinder to pivot through its stroke arc—ideal for swinging gates, chute diverters, and linkages. The body length A(SCJ) is 239 mm, and the 28 mm air cushion at each end decelerates the piston smoothly. The adjustable screw sets the stroke end within a 75 mm band, so you can dial in the exact travel needed on the machine without external hard stops.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X300-75TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 75 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. |
| -75 | 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 75 mm rear adjustment screw lets technicians dial in the exact stroke end position during machine setup, eliminating the need to fabricate custom hard stops or swap cylinders when the required travel changes slightly.
On packaging or assembly lines that handle multiple product sizes, operators can quickly adjust the cylinder stroke to match a new box height or pallet width, reducing changeover downtime from minutes to seconds.
In high-cycle clamping or pressing fixtures, the adjustable stroke compensates for pad wear or material thickness variation over time, maintaining consistent clamp force without reprogramming or mechanical shimming.
Step up to the 100 mm bore SCJ if your application needs more force—the SCJ100 delivers 3927 N push at 0.5 MPa. If your 300 mm stroke is fixed and never needs field adjustment, a standard SC80X300 with the same TC mount is a simpler, lower-cost choice. For guided loads or where side forces are present, consider adding an external guide rail or switching to a guided cylinder, as a 300 mm stroke on a single rod can introduce bending moments.
This SCJ80X300-75TC is a direct replacement for another AirTAC SCJ80 adjustable-stroke cylinder with the same 300 mm nominal stroke, 75 mm adjust range, PT port thread, and TC centre trunnion mount. The mounting kit code is F-SC80TC, supplied with the TCM1 bracket. Ensure the replacement matches the bore, stroke, adjust range, and port thread for a drop-in fit.
Adjustable-stroke checklist
At 0.5 MPa, it delivers 2513 N push and 2268 N pull. At the maximum operating pressure of 0.9 MPa, push force reaches 4523 N. The pull force is lower because the 25 mm rod reduces the effective piston area on the retract side.
Yes. The rear-cap adjusting screw is accessible with the cylinder mounted. You can shorten the stroke end by up to 75 mm from the nominal 300 mm maximum. The screw only sets the stroke end position; it does not change the cylinder's force output or speed.
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