The negative rake angle is generally provided on the tool made of
Answer is:
Tungsten carbide
Explanation:
Back-gear mechanism is provided in cone pulley headstock to reduce the speed of spindle.
A lathe half centre is used to face the workpiece up to the end of the centre hole.
Cast iron is commonly used for machinery housings or base due to its damping characteristics. It is also known for holding its shape when it is subjected to contraction and expansion due to temperature fluctuations. Hence lathe bed is usually made up of cast iron.