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Maintenance of Drive
Inspection of Belts
Maintenance of Drive
Home » Power Transmission Belts

Power Transmission Belts

Maintenance of Drive
V-belts are amongst the most reliable and trouble free means of power transmission. However, these drive belts require periodic inspection and maintenance, both while drive is running and while it is stationary. Few of the simple rules for the maintenance of drive belts are as follows:
  • Check the tension after certain time
  • Protect your belt from sunlight through guard
  • If any belt of the set fails, replace complete set



In addition to above-mentioned measures, for the proper maintenance of drive, it is recommended that always use a proper pulley, either of the recommended size or standard pulley. Make sure that pulley is quality certified and have proper grooves. It is also recommended that always use dynamically balanced pulley.

Maintenance of Drive

DIMENSIONS OF STANDARD V-GROOVED PULLEY
BELT SECTION PULLEY PITCH DIAMETER (INCHES) GROOVE ANGLE DEGREE ±0.5 MINIMUM OF WIDTH OF GROOVE (MM) MINIMUM GROOVE DEPTH (MM) CENTRE TO CENTRE DISTANCE OF EACH GROOVE (MM) EDGE OF PULLEY TO FIRST GROOVE CENTER (MM)
SPZ UP TO 80
OVER 80
34 38 9.70 9.90 11.00 12.0_0.3 8.00 + 1.0
A SPA

UP TO 118
OVER 118

34 38 13.00
13.30
13.30 15.0 + 0.3 10.00
B SPB

UP TO 190
OVER 190

34 38 16.90
16.90
17.50 19.0 +0.5 12.50
C SPC UP TO 315
OVER 315
34 38 22.50
22.90
23.80 25.5 + 0.4 17.00
D UP TO 475
OVER 475
36 38 32.30
32.60
28.00 37.0 +0.8 24.00
E UP TO 630
OVER 630
36 38 38.30
39.60
33.00 44.5 +0.7 29.00


Trouble Shooting

Some of the common belt problems and their causes are listed below along with the remedial measures. However, it is always recommended to get the help of a technical hand from the respective field for any kind of repair and replacement work.

PROBLEMS
PROBABLE CAUSES
REMEDIES
CUT OR CRACK FROM INNER SIDE
  • Pulley diameter less than minimum recommended
  • Excess belt slip
  • Temp. too high on the drive
  • Selection of proper drive
  • Check belt tension and number of belts.
  • Save belt from heat through different means
BELT TURNED OVER
  • Foreign particle on the pulley
  • Very high tension to belt
  • Excess belt flap
  • Jerk load
  • Pulley groove not proper
  • Misalignment
  • Save from foreign particles
  • Re-tensioning
  • Use idler
  • Tension should be proper
  • Use correct pulley
  • Do proper alignment
WEAR OUT
  • Pulley groove not proper
  • Mismatched belts
  • Pulley size not proper
  • Misalignment
  • Due to slip
  • Foreign material
  • Use correct pulley
  • Use preset belts
  • Use recommended pulley size
  • Align properly
  • Tension properly
  • Remove foreign particles
BELT BREAKS
  • Foreign obstruction
  • Less number of belts
  • Wrong belt selection
  • Jerk load
  • Belt installed over pulley forcefully
  • Install guard on the drive
  • Use complete set as per real design of the drive
  • Use proper belt section as per drive requirement
  • Check belt tension and design
  • Reduce centre distance then install and tension
EXCESS ELONGATION
  • New and old belts
  • Belts of different manufacturers
  • Belts of different codes
  • Change complete set
  • Use complete set of one manufacturer
  • Use preset belts on the drive




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