Page 498 - NORTON cutting-off and grinding wheels - industrial

498 TECHNICAL INFORMATION
TECHNICALINFORMATION
WET GRINDING
BURNING ŸEXCESSIVE HEAT£
Cause Wheel glazed or loaded
Solution Re-dress wheel
Cause Poor coolant placement
Solution Apply coolant directly to wheel/workpiece interface
Cause Excessive material removal rate
Solution Reduce downfeed &/or crossfeed
Cause Wheel speed too high
Solution Slower wheel speed
POOR FINISH
Cause Excessive dressing
Solution Use lighter dressing pressure
Stop dressing as soon as wheel starts to consume stick rapidly
Cause Grit size too coarse
Solution Select a finer grit size
Cause Poor coolant flow or location
Solution Apply heavy flood so it reaches wheel/work interface
CHATTER
Cause Wheel out of truth
Solution True wheel; ensure it is not slipping on mount
Cause Wheel too hard
Solution Check specification
WHEEL WILL NOT CUT
Cause Glazed by truing
Solution Dress lightly until wheel opens up
Cause Wheel loaded
Solution Dress lightly until wheel opens up
Increase coolant flow to keep wheel surface clean
Never run wheel with coolant turned off
Cause Grit size too fine
Solution Check specification
SLOW CUTTING
Cause Low feeds & speeds
Solution Increase feed rate; increase wheel speed (observe maximum wheel speed)
SHORT WHEEL LIFE
Cause Incorrect coolant flow
Solution Apply coolant to flood wheel/work surface
Cause Low wheel speed
Solution Increase wheel speed (observe maximum operating speed)
Cause Excessive dressing
Solution Use lighter dressing pressure
Cause Wheel too soft or too hard
Solution Change grit or grade; use higher concentration