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Why Do Belts Fail? Belt Wear/Failure Recognition
Exposure to Oil & Grease Weathering or "Crazing" Cut Bottom & Sidewall
Severe Localized Wear
Cause:
Belt swelling, exterior softness
and bottom envelope seam to open/split.
Remedy:
Splash Guards, don’t over-
lubricate, clean belts/sheaves.
Cause:
Belt drive elements, as well as
aggravation by small sheaves.
Remedy:
Check tension, provide drive
protection and replace belt(s).
Cause:
Belt being pried over sheave
during installation, as cut above indicates.
Remedy:
Use proper length belts and
tension properly when installing.
Cause:
Spin burn caused by a frozen or
locked drive sheave not able to turn freely.
Remedy:
Determine that drive components
turn freely and, if necessary, tighten belt.
Rough Sheave Sidewalls
Broken Belt
Snub Break
Abrasion
Cause:
Constant slippage due to belt
being misaligned on worn sheaves.
Remedy:
Use correct belt size. Align or
replace sheaves.
Cause:
Rough sheaves and dust build-up
can both cause belt failure and severe
envelope wear.
Remedy:
Shield the drive.
Cause:
Cover wear indicates slippage and
clean break reveals sudden snap due to
non-proper drive tensioning.
Remedy:
Maintain proper drive tension.
Cause:
Sidewall wear a result of foreign
material and rust in sheaves. Belt dropped
to bottom of sheave groove.
Remedy:
Dust guards to prevent abrasion.
Worn Side Pattern
Oil Deterioration
Cover Fabric Rupture
Base Cracking
Cause:
Worn or misaligned sheaves.
Remedy:
Retension drive to stop slip-
ping, realign sheaves (replace if needed),
replace belt if incorrect size.
Cause:
Rubber softened by excessive oil
exposure, causing deterioration.
Remedy:
Splash guards to protect drive
against oil.
Cause:
Fabric covering ruptured during
installation due to belt being pried over
belt sheave.
Remedy:
Proper installation of belts.
Cause:
Loose tensioning. Belt slippage
causes heat build-up and gradual under-
cord hardening.
Remedy:
New belt. Proper tensioning.
Distorted Belt
Ply Separation
Ruptured Belt
Slip Burn
Cause:
Distortion caused by broken cords
or adhesion breakdown.
Remedy:
Avoid prying on belts. Check
sheaves for recommended diameters.
Cause:
Split along pitch line indicating
belt ran on too small diameter of sheave.
Remedy:
Install a (x) cogged type belt.
Cause:
Ruptured cords in the plies,
caused by high shock load on foreign
object between belt and sheave groove.
Remedy:
Check tension, shield drive.
Cause:
Belt slipping under starting or
stalling load.
Remedy:
Replace belt and tighten
drives until slipping stops.
Synchronous Belt Cross-Reference
JASON MEGADYNE GATES GOODYEAR CARLISLE MBL
PLATINUM
(1)
POLY CHAIN
GIGA
(3)
GT CARBON
(3)
FALCON
(3)
TORQUE GX
(3)
GOLD
(2)
HTC
(3)
PANTHER
(2)
PLUS
SILVER
(2)
POWERGRIP® GT®2
(4)
HAWK PD
(2)
RPP PLUS
(2)
POWER
RATING
Highest
Lowest
(1) Compatible with Poly Chain®, RPP® or HTD® pulley groove profile only.
(2) Compatible with RPP® or HTD® pulley groove profile only.
(3) Compatible with Poly Chain® pulley groove profile only.
(4) Compatible with PowerGrip® GT®2 pulley groove profile only.
78
POWERING GLOBAL INDUSTRY
TECHNICAL DATA
TECHNICAL DATA