Brewer Machine & Gear Co.

Tips on Tensioner Usage

  • Tensioning that is too tight causes excessive chain, belt, and bearing wear
  • Tensioning that is too loose allows belt slippage or chain vibration, causing wear or loss of horsepower
  • Idlers should be located on the slack side of the drive
  • The use of idlers on the back of V-belts causes reverse bend and can reduce the life of the belt
  • However, when inside idlers are used, the arc of contact is reduced and allowance must be made for horsepower loss
  • The U.D.T. flanged flat face idler pulley can be run on the inside or outside of belt drives and will produce no additional wear on the sides of V-belts
  • Chain idlers should be run on the outside of the chain
  • Idler sprockets should have at least 3 teeth engaged with the chain
  • Idlers, when used on the outside of the drive, should be located approximately 1/3 of the center distance from the small pulley or sprocket
  • Idlers, when used on the inside of the drive, should be located approximately 1/3 of the center distance from large pulley or socket

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