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Question

Difficulty: EasyPower Grinders

When the abrasive wheel of a bench grinder becomes grooved or clogged with metal particles (loaded), which maintenance procedure should be performed to clean and flatten the cutting surface?

  1. A
    Applying lubricating oil to the grinding face
  2. Dressing the wheel with a wheel dresserAnswer
  3. C
    Increasing the spindle operating speed
  4. D
    Scraping the spinning surface with a steel file

Answer

Dressing the wheel with a wheel dresser
Dressing the wheel with a dedicated wheel dresser cleans out loaded metal shavings and shears off dull abrasive grains, simultaneously truing the face and exposing fresh, sharp cutting edges.

Step-by-Step Solution

1
Diagnose the grinding wheel surface condition
The wheel face is identified as loaded (clogged with metal) or grooved from uneven wear
Grinding soft metals or localized pressure clogs abrasive pores and degrades grinding performance
2
Select the correct reconditioning process
Apply a mechanical star-wheel dresser or diamond dresser across the wheel face supported on the tool rest
Dressing fractures dull abrasive particles, strips away embedded swarf, and trues the wheel geometry

Key Concept

Abrasive wheel dressing and truing
Estimated Time:45s
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Topics

Power Grinders

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