Make the sides of the wheel parallel
Make the outside diameter concentric with the bore
Equalize the weight in every position of the wheel
None of the above
Flutes
Threads
Diameter
Relief
Larger than the tap size
Smaller than the tap size
Equal to the tap size
Equal to the core (minor) diameter of the tap
On irregular jobs
To reduce the metal rapidly
On wood
If smooth file is not available
Insufficient cooling effect
Danger of corrosion
Decrease in cutting action of drill
Quick evaporation of water
