0 votes
80 views
asked in production by (215k points)

 Assertion (A): For cutting multi-start threads, the speed ratio is expressed in terms of the lead of the job thread and lead of the lead screw threads.  

Reason (R): The speed of the job is reduced to one third or one-fourth of the job speed used in the turning operation.                

Please log in or register to answer this question.

Welcome to Q&A discussion forum, where you can ask questions and receive answers from other members of the community.

10.4k questions

274 answers

26 comments

15.3k users

...