Answer is:
Reamer
Explanation:
A reamer is a multi-point cutting tool used for enlarging by finishing previously drilled holes to accurate sizes.
Answer is:
Cast iron
Explanation:
Cast iron does not require any coolant during reaming because, graphite in the cast iron acts as a lubricant.
Answer is:
Die
Explanation:
Threading dies are used to cut external threads on cylindrical work-pieces.
Answer is:
Die nut
Explanation:
The die nut is used for chasing or reconditioning the damaged threads.
Die nuts are not to be used for cutting new threads. The die nuts are available for different standards and sizes of threads. The die nut is turned with a spanner.
Answer is:
Tap extractor
Explanation:
Tap extractor can be used for removing a broken tap.
