Products

A fixed debarking rotor remains in a fixed position and does not automatically center itself according to the log diameter. Therefore, logs must be mechanically centered by the infeed conveyor before entering the debarker. Fixed rotors are primarily used for medium- and high-speed debarking.

A sliding debarking rotor automatically centers itself according to the log diameter. Sliding rotors are primarily used for low-speed debarking of large-diameter and/or long logs, including tree-length logs.

In a hydraulic tool pressure system, the debarking tools are located on the outfeed side of the rotor. Tool pressure is generated by stretching rubber springs, and the tension is adjusted using a hydraulic hand pump.

In a pneumatic tool pressure system, the debarking tools are located on the infeed side of the rotor. Tool pressure is generated by pneumatic cylinders supplied with compressed air from the mill’s compressed-air system through an air seal. The pressure can be adjusted remotely via the control system. The debarking tools also open automatically when log feeding stops.

Log butt ends are reduced before debarking to decrease the diameter of the butt flare and make the log more cylindrical. This ensures reliable debarker operation, reduces stress on the debarking tools and log feeding equipment, and enables smoother material flow in downstream processes such as sawing and peeling.

In sawmill applications, an oversized butt flare can make it more difficult to rotate the log into the optimal sawing position, which may reduce log yield. In veneer production, removing the butt flare on the veneer lathe takes additional processing time and can therefore reduce production capacity.

No. Logs can enter the butt reducer either top end or butt end first. When the butt end enters first, the log must be securely held by four feed rolls before entering the butt reducing rotor.

A traditional VK butt reducing rotor has fixed cutting tool settings. The tools are mounted on interchangeable reducing rings, and a separate ring-changing device is required to change the rings for different log diameter classes.

The Variable Flare Reducer (VFR) automatically adjusts and repositions the cutting tools for each individual log according to its diameter. This eliminates the need to change reducing rings when processing logs of different diameters.

Both solutions are designed for in-line operation as part of the debarking line.