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Why balance grinding wheels?

To unlock the full potential of modern tool grinding and multitask machines, it is absolutely essential to use fine balanced wheel packs. Due to high rpm, unbalanced grinding wheels may have negative effects both on quality and productivity.

Causes of unbalance on a grinding wheel

Four-part graphic depicting the causes of unbalance on a grinding wheel | © HAIMER

 

  1. Tolerance of grinding wheel bore
  2. Homogeneity of the grinding wheel
  3. Parallelism of the grinding wheel
  4. Concentricity of the grinding wheel
  • Tolerance of the grinding wheel arbor
  • Dressing of the grinding wheel
  • Wear of the grinding wheel
  • Profiling of the grinding wheel

Consequences of unbalancE

  1. Reduces surface quality -> Chatter marks
  2. Reduced dimensional accuracy on the work piece -> Increased costs for wheels dressing
  3. Extremely high grinding wheel wear -> Reduced tool life
  4. Spindle head wear out -> danger of machine down time -> unnecessary repairs -> expansive inspections

 

As a result, the grinding parameters are reduced and productivity is decreased.

Dressing ≠ Balancing

The regular and proper dressing of the grinding wheel is important to both reestablish a precise geometry and to create optimal grinding wheel topography. As the balance state changes constantly due to dressing, wear and profiling, the balancing of grinding wheels is essential in spite of dressing them!

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