42) A Dia 6H7 hole is to be reamed in a steel workpiece. What size of drill will be required ?
Related Cutting Tools MCQ - Machinist(Set-1) with Answers
In grinding wheel following abrasives are used
The natural abrasives are emery and corrundum,These are impure forms of aluminium oxide.
Artificial abrasives are silicon carbide and aluminium oxide.
Make surface flat so that bolt head can take proper seat on the surface
Spot facing is a machining operation for producing a flat seat for bolt head, washer or nut at the opening of a drilled hole. The tool is called a spot facer or a spot facing tool. Spot facing is similar to counter-boring, except that it is shallower. Tools that are used for counter-boring can be used for spot facing as well.