2015
Power Transmission Products
General Information
162
Technical Information
V-belt causes of premature failure
Problem
Cut Thru
on Top
(
Joined Belts)
Mismatched
Belts at
Installation
Belts too
Short at
Installation
Belts too
Long at
Installation
Excessive
Vibration
Excessive
Stretch
Belt
Squeal
Hardening &
Premature
Cracking
Belts Turn
Over
Possible Causes
Excessive Oil
Exposure to Elements
Pried Over Sheaves
Contact with Obstruction
Insufficient Tension
Stalled Drive Sheaves
Constant Slippage
Rough Sheaves
Substandard Sheaves
Excessive Tension
Shock Load
Foreign Material
Excessive Dust
Drive Misalignment
Worn Sheaves
Excessive Vibration
High Ambient Temperature
Damaged Tensile Member
Incorrect Belts
Incorrect Drive Set-Up
Insufficient Take-Up
Improper Matching
Mixed Old and New Belts
Non-Parallel Shafts
Different Manufacturers
Belt/Pulley, Incompatible
Corrective Action
Lubricate properly
Clean sheaves and belt
Replace belts
Provide protection
Install properly
Check for belt length
Remove obstruction
Tension properly
Free sheaves
Replace sheaves
File smooth
Redesign drive
Operate properly
Align drive
Provide ventilation
Check for proper belt
Check machinery
Use only new belts
Use single source
continued on page 161
Overview
Synchronous
Banded
V-Belt
Bushing Hardware
Specialty
Automotive & Truck
General Information