The diameter and rotational speed of a job are $$100mm$$ and $$500$$ $$rpm$$ respectively. The high spots (chatter marks) are found at a spacing of $$30$$ $$deg$$ on the job surface. The chatter frequency is

Reamer is designed to have even number of flutes to:

The base of a brass bracket has to be rough ground to remove the unevenness. The $$4$$ wheels available in the store. The appropriate wheel is

A parting tool has a ground front clearance angle of $${6^0}$$ and the back rake angle of $${10^0}$$. The tool, by mistake, was set $$1.5$$ $$mm$$ above the line of centers while machining a job of $$50$$ $$mm$$ out-side diameter.

The diameter of the job at which, while parting, the tool will start rubbing