Aluminium oxide wheel is used

Silicon carbide wheel is used

Diamond wheel is used

Corundum wheel is used

Thin section metal

Soft metals

broad section metals

Non-metals

to thread the hole with full threads up to the bottom

to start the threads

after the first (rougher) tap

to form the threads easily

45 Degree to the centre line of the file

60 Degree to the centre line of the file

75 Degree to the centre line of the file

80 Degree to the centre line of the file

Parallel reamer

Adjustable reamer

Expansion reamer

Chucking reamer