MCCCD Program Description

Mechanical Power Transmission Systems

Course: AIT110

First Term: 2022 Fall

Lecture 3.0 Credit(s) 2.0 Period(s) 2.0 Load
Subject Type: Occupational
Load Formula: T - Lab Load

Description: Introductory course in how to transmit, measure, calculate, and work safely with rotational mechanical equipment. Hands-on assembly, alignment, maintenance, and troubleshooting of mechanical power transmission systems and components e.g., belts, bearings, chains, dynamometers, gears, pulleys, couplings, bushings, and sprockets. Introduction to lubricant and grease types, their standards, safety, and application.

MCCCD Official Course Competencies
1. Perform installation, alignment, tension check, and adjustment on mechanical power transmission components. (I) 2. Apply troubleshooting techniques to mechanical power transmission systems, including shaft couplings, chain drives, gear drives, and belt drives. (II) 3. Perform performance measurements and calculations for horsepower, torque and power. (III) 4. Apply the correct lubricant to identified lubrication points on a machine according to its maintenance schedule. (IV)
MCCCD Official Course Competencies must be coordinated with the content outline so that each major point in the outline serves one or more competencies. MCCCD faculty retains authority in determining the pedagogical approach, methodology, content sequencing, and assessment metrics for student work. Please see individual course syllabi for additional information, including specific course requirements.

MCCCD Official Course Outline
I. Mechanical power system installation, alignment, and adjustment A. Motor mount 1. Soft foot correction 2. Motor leveling B. Measuring motor shaft speed using a tachometer C. Correct coupling installation 1. Flexible 2. Flange 3. Grid 4. Chain D. Manufacturer’s specifications for component for proper installation, measurement, and adjustment 1. Couplings 2. Shaft alignment techniques a. Feeler gauge b. Straight edge c. Rim and face d. Dial indicator e. Laser alignment equipment 3. V-belt drive components a. Sheaves and V-belts b. V-belt drive and straight edge alignment c. Tensioning the V-belt drive (1) Use of tension tool (2) Adjustable motor mount d. Multi belts with match code 4. Sprockets and chains a. Alignment of chain drive with straight edge b. Checking tension of a chain drive with straightedge and rule c. Tensioning a chain drive by positioning the prime mover 5. Bushings a. Split taper b. QD c. Taper lock bushings 6. Timing belt or HTD belt 7. Spur gear drive and right angle gear drive a. Attachment to shafts b. Aligning gear drive using a straight edge c. Backlash check of gears with dial indicator 8. Pillow block and flange block bearing II. Troubleshooting, visual inspection, wear analysis, and malfunction identification A. V-belt drive B. Chain drive C. Gear drive D. Pillow block bearing E. Synchronous/timing belt F. Couplings III. Horsepower, torque and power A. Types and functions of Dynamometers aka “Dyno” 1. Prony brake 2. Electric motor/generator 3. Water break B. Tool selection and application to measure motor shaft speed, horsepower, torque, and power C. Calculating horsepower, power, and efficiency by applying a load to a motor D. Mathematical calculations for horsepower, torque, gear ratios, speed, and efficiency IV. Lubrication A. Lubrication plan B. Oil and grease lubrication points C. Correct lubricants given specifications and experience D. Safe handling and storage of lubricants E. Lubrication of bearings using Zerk fittings F. Operation of a grease gun 1. Changing cartridges 2. Priming G. Automatic lubricators 1. Inspection 2. Fill H. Lubrication oil 1. Origins 2. Manufacturing 3. Grades 4. Usage 5. Additives 6. Viscosity 7. Viscosity index 8. Standards I. Lubricating grease 1. Origins 2. Manufacturing 3. Grades 4. Usage 5. Additives 6. Standards J. Purpose of vent plugs K. Purpose of additives, viscosity, and viscosity index L. Effects of over and under lubrication of bearings

MCCCD Governing Board Approval Date: February 22, 2022

All information published is subject to change without notice. Every effort has been made to ensure the accuracy of information presented, but based on the dynamic nature of the curricular process, course and program information is subject to change in order to reflect the most current information available.