Instruct: Classify a given review into positive or negative sentiment.
Query: Threadcutting in the Lathe

While grounded in the practical methods for cutting single and multiple lead threads it also makes the theory and math involved in determining change gears need for non-standard threads understandable. As a plus it explains what is required in plain language to modify one's own lathe to use some of the bag of tricks high end tool room lathes use when cutting threads by the practical experience modifying his own Myford. Well worth the money for the person with a metal working shop at home.