Portland Community College Sylvania Campus 12000 SW 49th Ave., Portland, OR 97219 Room: AM 113 MCH 135 Basic Measuring Tools Fall/winter/spring 2013/14 See Resource Room Posted Schedule
Instructor: Rick Luff Email: [email protected] Phone: 971-722-4155 CRN: See catalog for term Credit Hours: 1.5 Seminar: None Lab Hours: See posted schedule within department. Office Hours: See posted schedule within department. Prerequisites: MCH 100, Audit available.
Course Description: Covers use and applications associated with basic measuring tools including: the machinist's scale, dividers, telescoping gage, combination square, hermaphrodite caliper, surface gage, surface finish gage. Introduces the proper techniques and applications of the basic transfer measurement and comparison tools in measuring holes accurately, scribing parallel lines, finding the center of round stock, determining the factors which contribute to the quality of surface finish, and practice in identifying surface finishes.
Course Content (Themes, Concepts, Issues and Skills) Basic Measuring Tools consists of the following modules: Machinist Scale / Dividers - Every part produced in the machine shop must be measured in some way. The machinist's scale (rule) is used for rough measurements and laying out work pieces for machining. In this module", the student will develop your skill in the use of the scale. Dividers are a measuring device even though they have no scales to read. One of the important uses of the dividers is transferring measurements from a drawing to the work piece. Because of the methods used to reproduce drawings, machinist's scale or the dividers cannot be used directly on the drawing. Instead, the machinist must read the dimensions on the drawing, set the dividers to that measurement to the work piece. In this module, the student will learn to transfer measurements from the scale to the work piece. Telescoping Gage - How to measure holes accurately is one of the many skills the machinist must learn. There are several different methods and tools that can be used to perform this operation. The telescoping gage is one of these tools. In this module", the student will learn to use the telescoping gage to determine the diameters of holes. Combination Square / Hermaphrodite Calipers - In this module", the student will learn to use a set of tools called the combination square set to scribe angles and straight lines on a piece of metal and how to layout the center of a piece of round stock. In this module, the student will learn to use the hermaphrodite caliper to scribe parallel lines and find the center of round stock. Surface Gage / Identifying Surface Finishes - Machinists must sometimes scribe lines on a vertical surface. In this module", the student will learn how to scribe such lines with the surface gage. Much consideration must be given to surface smoothness wherever two machined surfaces come into contact with each other. This module will help the student identify factors that contribute to the quality of surface finish," and give practice in identifying surface finishes. Course Activities and Design MCH 135 will be presented by means of audio-visual presentations", demonstrations, lab experiences," and research activities. The course activities and design emphasize the development of skills and knowledge outcomes prescribed by established industry standards. The identified outcomes will be achieved by means of individual and team activities.
Required Materials: MMT students need to have purchased all items specified on the Approved Tool List .
Course Schedule: This course is structured in a lab format. Students enrolled in this course need to choose either the A.M. or P.M. open lab session to attend for the duration of the term. Changing between sessions will only be permitted due to documented emergencies and at instructor’s discretion.
Attendance/Make-up: A time clock is located just inside the entrance to AM113. Timecards will be used each day the student enters and leaves the lab facility.
Course Success: This course is structured with flexibility built in for the student to complete bookwork and lab time at their convenience within the shift they select. Students may work through the modules at an accelerated pace as long as modules are completed sequentially.
Grading Criteria: The instructor will take the score of the final tests for each module (100% possible for each) and average them together to develop the final grade for the course. Grading for this averaging will be as follows:
A 90-100% B 80-89% C 70-79% D 60-69% F 59% or less
Standards for Credit Courses: • Students who have a documented disability and require a classroom adjustment or accommodation should contact Disability Services www.pcc.edu/resources/disability • Code of Student Conduct www.pcc.edu/about/policy/student-rights/student-rights.pdf#code- of-student-conduct • PCC Grading Guidelines www.pcc.edu/resources/academic/standards- practices/AcademicStandardsandPractices-GradingGuidelines.html • Academic Integrity Statement: Students are required to complete this course in accordance with the Student Rights and Responsibilities Handbook. Dishonest activities such as cheating on exams and submitting or copying work done by others will result in disciplinary actions including but not limited to receiving a failing grade. See the Academic Integrity Policy for further details. www.pcc.edu/about/policy/student-rights/student-rights.pdf#academic-integrity • Flexibility Statement: The instructor reserves the right to modify course content and/or substitute assignments and learning activities in response to institutional, weather, or class situations.