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Trouble Shooting - Tool Post Grinders

Symptom Likely Cause Remedy
Work surface marred Grinding wheel loaded Dress grinding wheel
Use harder grinding wheel 
Decrease work speed
Wheel glazed and dull Dressing technique too fine 
Work speed too slow
Cut too tight 
Grinding wheel too hard  
Grinding wheel speed too fast
Use coarser dressing technique 
Increase work speed 
Increase cut 
Use softer grinding wheel 
Decrease grinding wheel speed
Work heat distorted Work speed too high 
Grinding wheel too hard 
Dry grinding
Decrease work speed 
Use softer grinding wheel 
Use grinding fluid
Wheel rubbing & burning work Grinding wheel glazed Dress grinding wheel
Use softer grinding wheel 
Increase work speed
Chatter, bouncing, or hammering Loose spindle bearings 
Spindle deflection  
Faulty belt  
Motor vibration 
Machine vibration 
Grinding wheel too hard 
Grinding wheel out of balance 
Grinding wheel improperly dressed 
Improper work speed
Grinding wheel speed too high
Check spindle bearings 
Use shorter extension
Check belt for uneven thickness or bumpiness
Check motor bearings and motor mount  
Check machine and foundation vibration 
Use softer grinding wheel 
Use Dumore balanced grinding wheels 
Redress grinding wheel 
Increase or decrease work speed 
Decrease grinding wheel speed
Scratches or fishtails in work Grit in coolant 
Faulty dressing 
Sludge / grit in wheel guard
Filter coolant 
Use sharp diamond 
Use finer dressing technique
Carefully clean wheel guard
Traverse marks in work Corners not rounded off  
Spring in spindle 
Too deep of cut 
Work speed too slow
Break corners by dressing 
Check for warped or out of round spindle 
Decrease cut
Increase work speed & check traverse rate
Wheel loading Grinding wheel too soft 
Work speed too fast 
Grinding wheel speed too slow
Improper dressing
Use harder grinding wheel
Decrease work speed 
Increase work speed
Use finer dressing technique
Work slightly tapered Wheel breaking down too quickly Use harder grinding wheel