News & Knowhow

"Blue stain” spots on the veneer sheets are a reaction of tannic acid from the wood and the iron in the steel of the knife and/or the pressure bar. This phenomenon can be found in wood species with high tannic acid content such as red or white oak, c...

Customer needs to change the knife more frequently. Possible reasons: 1. Quality of logs changed (e.g. smaller logs, different sourcing of logs, more knots in the logs, not fresh wood,…) 2. Insufficient log preparation (e.g. debarking or cooking) 3. ...

Knives and pressure bars may get small haircracks, mostly because of a wrong handling, which may lead to bigger cracks / outbreaks. The reasons can be: 1. Wrong regrinding process 2. Wrong installation of the knives and pressure bars in the peeling o...

The bending of tools can be caused by in-appropriate regrinding by the customer. Reasons can be various: 1. Poor grinding machine condition 2. Aligning of the knives on the grinding machine 3. Wrong grinding parameters 4. Overheating of the cutting e...

Slitter knives’ cutting edges may break out or chip. Mainly the root cause is a mechanical overload. The following reasons may cause chipping of slitter knives : Horizontal cutting clearance too small or too big Vertival overlapping ; too much Mechan...

In particular cases shear blades may break through. This occurs rarely and is usually caused by incorrect mounting of the shear blades. The following reasons may cause breakage of shear blades : The contact area is not flat The contact area is dirty ...

Shear blade cutting edges may break out or chip. Mainly the root cause is a mechanical overload. Often the cutting clearance was not adjusted according to the material that has to be cut. In certain cases sheet double-layers may be the root cause. Us...

Shear blades wear out during usage. Sporadic premature wear may occur. This means: the cutting edges round off very strongly after a short period of use. The root cause may be incorrectly selected knife material or low hardness. However, it is also p...

Scrap choppers cutting edges may break out or chip. Mainly the root cause is a mechanical overload. Often the cutting clearance was not adjusted according to the material that has to be cut. Side trimming units usually do not have an automatic cuttin...

Knife breaks which are starting from the tapped holes can occur for various reasons: 1. The tapped hole is dirty and the screws are adjusted too hard 2. Tapped holes in the back might break if the remaining thickness of the material is too thin Not r...