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 |