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Maintenance of Drive / Trouble Shooting

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:

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
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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