| Problem |
Possible Cause |
Suggested Correction |
Feed lines or spirals on workpiece
|
Poor wheel dressing
|
Redress wheel carefully
|
| |
Wheel too hard
|
Use softer wheel or reduce wheel feed
|
| |
Wheel head tipped
|
Realign wheel head
|
| Scratching of work |
Wheel too soft
|
Use harder grade wheel
|
| |
Faulty wheel dressing
|
Check for cracked or loose diamond and redress
|
| |
Wheel too coarse
|
Use finer grit wheel
|
| |
Dirty coolant
|
Change coolant |
Burning of workpiece
|
Wheel too hard
|
User softer grade wheel
|
| |
Work speed too slow
|
Increase work speed
|
| |
Wheel infeed too fast
|
Reduce wheel infeed
|
| |
Poor coolant flow
|
Ensure coolant directed at grinding contact
|
Wheel glazing (shiny appearance)
|
Wheel too hard
|
Use softer grade wheel
|
| |
Wheel too fine
|
Use coarser grit wheel
|
| |
Poor wheel dressing
|
Check diamond sharpness and redress
|
| |
Poor quality/quantity coolant
|
Reduce oil level and increase amount of coolant
|
Wheel loading (metal lodged in wheel porse)
|
Wheel too fine
|
Use coarser grit wheel
|
| |
Wheel too hard
|
Use softer grade wheel
|
| |
Wheel too finely dressed |
Give a more open dressing to wheel
|
| |
Poor coolant
|
Increase supply and clean coolant
|
| |
Insufficient wheel breakdown
|
Increase work and traverse speeds
|
Bell-mouthed hole
|
Tipped work head
|
Relaign work head
|
| |
Misalignment of center heights |
Carefully "zero" centers
|
| |
Over traveling of wheel
|
Reduce over travel from both ends
|
| Tapered hole |
Wheel too soft
|
Use harder grade wheel
|
| |
Uneven travel past ech end of hole
|
Adjust over travel to be equal on both ends
|
Out-of-round hole
|
Overheated during previous rough grinding andbecome distorted
|
Before finish grinding, loosen clamp and retighten one at a time
|
| |
Rotating fixture out of balance
|
Balance rotating fixture
|
| |
Hole distorted after front face grinding
|
Grind front face before grinding the hole
|
Chatter marks
|
Wheel too hard
|
Use softer wheel
|
| |
Spindle maaterial not rigid enough
|
Replace spindle
|
| |
Defective belt
|
Replace belt
|
| |
Wheel out of balance or truth
|
Balance and/or true wheel... avoid use of bushed wheels
|
| |
Dust or other particles inside wheel pully motor
|
Clean inside surface of pulleys
|
| |
Worn spindle Machine not on solid foundation
|
Replace spindleAssure machine is properly aligned and not adjacent to heavy vibrating machines
|
