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Vibration reduction on hand-held grinders by automatic balancing

H Lindell1

  • 1IVF, Swedish Institute of Production Engineering Research, Gothenburg, Sweden.

Central European Journal of Public Health
|February 1, 1996
PubMed
Summary

Handheld grinders with automatic balancers significantly reduce vibrations, lowering injury risk by 75%. This innovation also decreases grinding disc wear and improves grinding outcomes for industrial applications.

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Area of Science:

  • Engineering
  • Occupational Health

Background:

  • Grinding wheel imbalance is a primary source of vibration in handheld grinders.
  • Uneven mass distribution and manufacturing tolerances in grinding wheels lead to dynamic unbalance, which changes during use.
  • This unbalance contributes to vibration injuries and increased tool wear.

Purpose of the Study:

  • To investigate the effectiveness of automatic balancers in reducing vibrations from handheld grinders.
  • To assess the impact of vibration reduction on injury risk and grinding efficiency.
  • To evaluate the applicability of automatic balancing technology to existing grinding machines.

Main Methods:

  • Implementation of an automatic balancer system, comprising steel balls in a ball race on the grinder shaft.
  • Measurement of vibration reduction achieved by the automatic balancer.
  • Evaluation of changes in grinding disc consumption and grinding results.
  • Assessment of balancer stabilization time and performance under varying speeds.

Main Results:

  • Vibrations are reduced by at least 50%.
  • The estimated risk for vibration-related injuries is reduced by a factor of four (75% reduction).
  • Grinding disc consumption is reduced, and grinding results are improved.
  • The automatic balancer stabilizes within tenths of a second and remains stable during operation.

Conclusions:

  • Automatic balancing effectively mitigates vibrations in handheld grinders.
  • This technology offers significant benefits for worker safety and operational efficiency.
  • The balancing system is compatible with most commercially available grinding machines.

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