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Off-Set Machinery: V-Belts, Chain, Timing Belts

Mechanical

Course Number: OSM-201

OSM-201-01Using-a-Laser-to-Align-Backed-Betls.jpg

Course Description:

When working with belt or chain drives it is critical to understand component wear characteristics, proper installation procedures, alignment, proper tensioning, sheave and sprocket inspectionl. It’s not just achieving the expected life of the belt or chain but also the life of the bearings on the driver and driven machinery. Too much or even too little attention to tension or alignment can result in rapid and expensive bearing failures. The attendee will learn about basic mechanical applications, failures, life expectancy and maintenance of shafts, bearings, chains, sprockets, bushings, belts (V-belt, synchronous belt, timing belt), sheaves and other off set machine components.

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Each student will receive class books, work activity sheets, self-test progress evaluations, as well as questions from the instructor to make sure they understand the material presented. It is expected that an attendee will leave the class with the basic knowledge of the subject and possess new found skills to better equip them when they return to their job. A certificate suitable for framing will be issued to each attendee who successfully completes the course.

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Hands-on activities:
35% hands-on activities

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Free Materials included:
Audel Multi-Craft Mini-Ref ($20)

Sheave Gage ($25)

Tension Tester ($40)

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1-day course: $650 per person

Course Syllabus

TYPES OF DRIVES

  • Direct driven machines (straight line)

  • Off-set machines (belts and chains)

 

BEARING LIFE AND PROTECTION

  • Short history of anti-friction bearings

  • Why anti-friction bearings did not sell

  • Theoretical life of an anti-friction bearing

  • Bearing life varies as the cube of the load

  • Bearing die by spalling

  • Davis Law of Spalling

  • Bearing configuration

    • Open

    • Shielded

    • Sealed

  • Bearing numbering and sizes

  • Hands-on exercise

 

HISTORY OF BELT POWER TRANSMISSION

  • Flat belts-how they work

  • Correction of wandering

  • V-Belts-how they work

  • V-Belt Construction

  • V-Belt videos

  • Cross section identification

  • Classical A,B,C,D,E

  • Fractional HP belts

  • Narrow-V belts 3V,5V,8V

  • Cogged belts

  • Banded belts

 

V-BELT INSPECTION

  • Sheave wear

  • Sheave inspection

  • Eyeballing sheave wear

  • Use of correct inspection tool

 

STORAGE OF V-BELTS

  • Storage video

  • Temperature and humidity specs

 

BELT GUARDS

  • Heat resistance of V-belts

  • Adequate ventilation

  • Inspection plates

 

V-BELT INSTALLATION

  • V-belt installation check-list

  • Checking replacement sheaves

  • Temperature and humidity specs

 

V-BELT TENSIONING

  • Force-deflection method

  • Force-deflection video

  • Force deflection hands-on exercise

  • Tension finder method

  • Tension finder video

  • Forced frequency method

  • Forced frequency video

  • Percent elongation method

  • Percent elongation hands-on

 

BELT ALIGNMENT

  • Straight edge alignment

  • 4-point string alignment

  • Laser alignment (Belt Hog)

 

SYNCHRONOUS BELTS

  • Trapezoidal belts

  • Curvilinear belts

  • Drive design

  • Drive alignment

  • Synchronous applications

 

STROBE LIGHT INSPECTION

  • Checking bushing perpendicularity

  • Slow motion study

  • Determining RPM

  • Resonance of Belts

  • Object with natural frequency

  • Forcing frequency

  • Lack of damping

 

CHAINS AND SPROCKETS

  • Roller chain video

  • Lubrication

  • Measuring sprocket wear

  • Sprocket troubleshooting

  • Chain tensioning

  • Measuring chair wear

  • Hands-on gauge construction

  • Alignment using straight-edge

 

Course Pictures

Using a Laser to Align Backed Belts:

VFD-302-01PowerFlex-Control.jpg

Using a Laser to Align Backed Belts

Proper Belt Tensioning:

OSM-201-03Proper-Belt-Tensioning.jpg

Wear Gauge for Chain:

OSM-201-08Wear-Gauge-for-Chain.jpg

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