COVID-19 College Update | March 31, 2020

In accordance with Governor Wolf’s directive, the College’s physical campuses and centers will remain closed through April 30. However, all courses, student support services and College operations are occurring remotely. The College continues to serve students and the communities of Delaware and Chester Counties. Please visit for more information.
Delaware County Community College, Serving Delaware and Chester Counties

MTT 122 - Lathe Operations II

Course Description

This course is designed to provide supplemental theory and skills instruction in conventional lathe machining operations. Skill embellishment and expanded external, as well as internal surface piece-part machining operations and associated accident prevention practices and procedures will be stressed in this course. Concepts and mathematical calculations for part geometry determination, specific lathe (machining) requirements, and the use of digital readout units will be covered. Carbide/ceramic/diamond cutting tool material, insert, and tool holder identification and selection requirements for lathe work will be explained in detail. Process planning and Geometric Dimensioning and Tolerancing (GD&T) characteristics appropriate for lathe machining will also be addressed. Upon successful completion of this course, students should be able to: Set-up and operate a conventional engine lathe to complete intermediate to advanced operations involving trepanning, tool post grinding, radius-turning devices, threading (tap/die) heads, steady, and follower rests. Select accessories and attachments, set-up and use face plates, independent, universal, and combination chucks, collect attachments, and a steady rest to facilitate internal surface feature creation such as radii, bores (straight, and tapered), grooves, and chased threads on a lathe. Interpret print requirements (including GD&T) and part geometry for machining and inspection of advanced lathe parts. Identify coolant requirements; and, using machinability and other factors, select inserts and toolholders for job completion. Perform geometric/algebraic/trigonometric calculations for set-up, machining and inspection of parts, to include chamfers, tapers, threads, etc. Review reference materials in order to develop a process plan (to include job/operations tooling, and inspection procedures) for machining of a basic lathe piece-part. Conduct mathematical calculations associated with tapers, threads, torque, horsepower, unit cycle time/cycle time reduction, and basic estimating.
Credit Hours: 3
Lecture Hours: 2
Lab Hours: 2

Course Prerequisites: MTT 112