Finding the Angle of Lap, Tight Side Tension, & Belts for a Pulley Belt Drive

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SUMMARY

The discussion focuses on calculating the angle of lap, tight side tension, and the number of belts required for a pulley belt drive system. Participants recommend using the Machine Design and Analysis package for MathCAD, specifically Section 1.13, which provides a comprehensive guide on selecting V-belts, including horsepower ratings and service factors. Additionally, a useful online reference from the University of Western Australia is shared, which covers various aspects of belt drives, including leather and rubber belts, timing belts, and more. These resources are essential for anyone working with belt drive systems.

PREREQUISITES
  • Understanding of pulley belt drive systems
  • Familiarity with V-belt selection criteria
  • Knowledge of horsepower ratings and service factors
  • Experience with MathCAD for engineering calculations
NEXT STEPS
  • Research the Machine Design and Analysis package for MathCAD
  • Study the online reference from the University of Western Australia on V-belts
  • Learn about the different types of belts: leather, rubber, and timing belts
  • Explore the principles of tensioning and alignment in belt drive systems
USEFUL FOR

Mechanical engineers, machine designers, and technicians involved in the design and analysis of pulley belt drive systems will benefit from this discussion.

loz3002
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to be honest i don't know if this is the right place to be but i got a question,
if i have a belt drive consisting of two pulleys what is the equation to find the angle of lap,the tight side tension and number of belts required? I've completely forgot how to do this stuff
 
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oh come on you know you want to help me, please?
 
Not enough info. What is the application?
 
http://www.mech.uwa.edu.au/DANotes/V-belts/home.html
 
Nice link Fred. I have belt selection books from 2 manufacturers but this online reference is handy.
 
I don't get a chance to use belt drives very often. When I do, I like to take a look at that link. Glad you like it.
 
FredGarvin said:
I don't get a chance to use belt drives very often. When I do, I like to take a look at that link. Glad you like it.

Hey Fred, just thought I'd let you know about something I found while poking around in the Machine Design and Analysis package for MathCAD-

Machine Design and Analysis: Section 1.13- Selecting a V-Belt

It runs you through the entire process laid out in that website link, from horsepower ratings, to Service factors, etc. Interestingly it also has sections on selecting leather, rubber, or multiple V-belts; along with all of that is timing belts, wire-rope drives, and of course gear trains, bearings and shafts, springs, ... Holy moley it's got a lot in there.
 
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