Burn |
Roll speed too slow |
Increase roll RPM |
Wheel too hard |
Reduce wheel speed, use softer grade |
Wheel needs dressing |
Dress wheel open with plenty of coolant |
Chatter |
Spindle bearing failure |
Check bearings for quality and alignment |
Roll speed too fast |
Reduce roll speed until vibrations stops |
Inadequate lubrication of roll necks |
Pour oil on roll necks, check condition of work rests |
Wheel too hard |
Reduce wheel speed, use softer grade |
Poor quality finish |
Contaminated coolant |
Filter coolant and clean regularly |
Grit collection in guard |
Clean and flush inside guard periodically |
Traverse too fast |
Reduce traverse rate |
Poor wheel dressing |
Dress correctly before finish operations - use adequate coolant before dressing |
Roll speed too slow |
Increase roll RPM |
Infeed too heavy |
Reduce infeed for last few passes |