Counter sink drill 75 Degree
Counter sink drill 80 Degree
Counter sink drill 90 Degree
Counter sink drill 120 Degree
Poor wedging action
Weak cutting edge
Rough hole surface
Increased point angle
The bored hole has insufficient reaming allowance
Excessive cutting speed
Wrong selection of the reamer for the job
Insufficient coolant supply
Reduce the friction between the wheel face and the job
Wash away chips
Prevent loading of wheel
All of the above
Grinding fluids are used to Reduce the friction between the wheel face and the job Wash away chips Prevent loading of wheel