|
PROBLEMS |
CAUSES |
REMEDIES |
|
EXCESSIVE
ELONGATION |
 |
Worn
or badly
machined
pulley
grooves. |
|
New
and used
belts
mixed on
the
drive. |
|
Belts
of
different
manufacturers
on one
drive. |
|
|
|
Replace pulley. |
|
Replace with a new belt set. |
|
Matched set used should be one manufacturer. |
|
|
|
BELT
BREAKING AFTER FITTING |
|
Belt forced over pulley damaging tension Member and cover fabric. |
|
Shock
load |
|
Less than required belts or wrong section. |
|
Drive stalled. |
|
Foreign
matter
obstructs
running |
|
|
|
Reduce
drive
center
distance
to fit
belt. |
|
Recheck
design.
Check
belt
tension. |
|
Recheck
design
and fit
correct
number
of belts. |
|
Check
cause
and
correct. |
|
Install
effective
guard. |
|
|
|
BELT WEARS RAPIDLY |
|
Incorrect
pulley
groove
angle. |
|
Drive
misaligned. |
|
Small
Pulley
diameter
less
than
recommended. |
|
Mismatched
belts. |
|
Belt
slips. |
|
Belt
hits
against
protruding
parts. |
|
|
|
Use
new
pulley. |
|
Realign
drive. |
|
Redesign
drive. |
|
Check
for use
of CONTI
TECH
INDIA ROFLEX-X. |
|
Replace
with
matched
belts. |
|
Provide
proper
tension. |
|
Check
and
remove
obstruction. |
|
|
|
BELT TURNED OVER |
|
Drive
misaligned. |
|
Broken
cord
caused
by
forcing
belt
over
pulley. |
|
Incorrect
pulley
groove
section
or
excessive
groove
wear. |
|
Shock
loads. |
|
Excessive
belt
flap. |
|
High
belt
tension. |
|
Ingress
of
foreign
matter. |
|
|
|
Realign
drive. |
|
Replace
belts
set
correctly. |
|
Use
new
pulley. |
|
Apply
proper
tension. |
|
Use
inside
idler on
slack
side.
Use
banded
belts. |
|
Retentions. |
|
Remove
foreign
matter. |
|
|
|
EXCESSIVE
BELT VIBRATION |
|
Insufficient
belts on
drive. |
|
Center
distance
too long. |
|
Low
belt
tension. |
|
Unbalanced
pulleys. |
|
High
shock
loading. |
|
|
|
Check
drive
design
and
modify. |
|
Reduce
center.
Use
inside
idler on
the
slack
side.
Use
banded
belts. |
|
Retentions. |
|
Use
suitably
balanced
pulleys. |
|
Use
an
inside
idler
pulley
on the
slack
side. |
|
Use
banded
belts |
|
|
|
BELT
CAN NOT BE RETENSIONED |
|
Insufficient
allowance
for
stretch. |
|
Incorrect
belts
tength. |
|
Belt
from
different
manufacturers.
Used on
same
drive. |
|
Stretch caused by insufficient belts or wrong belt section for drive. |
|
|
|
Modify
drive
more
take up. |
|
Use
correct
belt
length. |
|
Use
matched
belts of
one
manufacturer. |
|
Check
drives
design. |
|
|
|
NOISE |
|
Drive
misaligned. |
|
Incorrect
belt
tension. |
|
Overloaded
drive. |
|
Unbalanced
pulleys. |
|
|
|
Realign. |
|
Retention. |
|
Redesign
drive. |
|
Use
balanced
pulley. |
|
|
|
CUTS &
BREAKS IN BELTS BASE
RUBBER |
|
Pulley
diameter
too
small. |
|
Excessive
belt
slip. |
|
Ambient
temperature
too high
(above
60ºC). |
|
Outside
idler
pulley
in use. |
|
Contamination
by oils,
chemicals. |
|
|
|
Redesign drive with correct pulley diameter.
Check for use of
CONTI
TECH
INDIA
ROFLEX-X. |
|
Check drives design. Ensure correct number of Belts. Check belt tension. |
|
Protect belt from direct heat. Ensure good Ventilation. Refer to our engineers for special belts contortions.. |
|
Replace with inside idler pulley on the slack side increase the size of existing idler pulleys. |
|
Protect
drive
from
contamination. |
|
|
