The tool material, for faster machining, should have

Machinability is a material's ability to be cut, drilled, shaped, or ground. It's a measure of how easily a material can be cut with a cutting tool.  Machinability is represented in percentage relative to a reference metal. A smaller value means the metal is harder to machine. For example, very difficult-to-machine materials can have a machinability rating of 10-20%, while very easy-to-machine materials can reach 200-400%.  Machinability is calculated for each material by calculating the weighted average of normal cutting speed, surface finish, and tool life.  A material with good... Show more

Machinability is a material's ability to be cut, drilled, shaped, or ground. It's a measure of how easily a material can be cut with a cutting tool. 

Machinability is represented in percentage relative to a reference metal. A smaller value means the metal is harder to machine. For example, very difficult-to-machine materials can have a machinability rating of 10-20%, while very easy-to-machine materials can reach 200-400%. 
Machinability is calculated for each material by calculating the weighted average of normal cutting speed, surface finish, and tool life. 

A material with good machinability:
Requires little power to cut
Produces a smooth surface finish
Minimizes wear on the tooling
Can be cut quickly
Easily obtains a good finish 

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