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Most standard harmonic balancers are assembled with inserted dampening rubber which won't handle the torque forces and higher revs the modern engines generate. This leads to spinning of the inertia ring resulting in loss of timing accuracy and eventual component separation. Often these balancers are made of relatively weak Grey cast iron which often cracks in the keyways and centre webbing.
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Even expensive all steel or alloy performance balancers from most manufacturers use similar rubber inserts which still break down over time in the same way as standard balancers.
POWERBOND balancers eliminate these common failures in standard and performance balancers by positively bonding the dampening rubber to the metal components under extreme heat and pressure.The state of art bonding process used on all POWERBOND models eliminates spinning of the inertia ring and separation of the dampening material in even the most highly stressed applications.
Every POWERBOND harmonic balancer is manufactured from all new materials; either high strength SG (nodular)iron or AUSI 1045 steel precision CNC machined for total accuracy. Every assembly is balanced at the factory to precise tolerances.
The ultra modern manufacturing process allows all new POWERBOND balancers to be sold at the price of manufactured exchange units - so you get true value for money without the hassles of core return and exchange. |
POWERBOND Range
Dampening Material
Assembly
Balance
Warranty
Exclusions to the Warranty
STREET
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The POWERBOND STREET series brings bonded balancer technology within the budget of every performance street engine builder from mild to wild. They also make a great heavy duty standard replacement balancer.
POWERBOND STREET balancers are also perfect for limited spec race classes such as late model stock that require an OEM style balancer.
The bonded dampening rubber in every POWERBOND STREET series balancer eliminates spinning and component seperation giving reliable performance in engines used to 6500rpm.
POWERBOND STREET series combine new high strength SG (nodular) iron balancers centres with new inertia rings, bonded then balanced to extremely tight tolerances.
All POWERBOND STREET balancers feature easy to read permanently etched timing marks on the outer ring. |
SFI RACE
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The POWERBOND RACE series brings the advantages of bonded balancers to high revving race and street/race applications where an SFI approval is required.
Every POWERBOND RACE series balancer features a precision CNC machined AUS 1045 steel centre bonded to an equally strong steel inertia ring. Advanced design means that race series balancers are very light for an all steel product. An most cases they are only marginally heavier than the original cast iron balancer and generally much lighter than all steel balancers on the market.
The steel inertia ring of the race series models is positively protected against forward and backward movement and has the assurance of bonded rubber to eliminate spinning.
Every model has easy to read computer etched timing marks. All POWERBOND RACE series meet SFI specification 18.1. |
SERPENTINE
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Late model engines with SERPENTINE belts driven off the damper ring create much higher loads on both the inertia ring and dampening material. The strength and durability of POWERBONE is even more critical on SERPENTINE engines, particularly in performance or race applications.
POWERBOND SERPENTINE dampers are available for popular late model applications including Chev LT1, LS1 and LS6 and the Ford 4.6 and 5.4 litre Modular series. To give engine builders maximum flexbility, STREET and SFI RACE versions are available. In addition, RACE versions are offered in standard diameter, 10% underdrive, 25% underdrive and 8 rib drive for supercharge conversions. |
| EXTREME |
With race engine builders using higher compression ratios and higher RPMs to maximise power, the effectiveness of lightweight harmonic balancers can be severly compromised.
POWERBOND engineers have developed the new EXTREME SERIES balancers for popular race applications. The new designs have substantially increased inertia mass without increasing overall weight.
A new rubber compund with extremely high temperature resistance is used in the bonding process to provide long term optimum dampening performance in the most severe race applications. |
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All POWERBOND dampers use a rubber formula that has been developed over 23 years in the damper business. The formula is exceptionally resistant to ageing and gives excellent control of elesticity in the pressure and bonding process employed.
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In most dampers, pre-extruded strip or o-rings are used as the dampening material, which is assembled using various methods that resist inertia ring dislocation with varying degrees of success. Common assembly methods inlcude straight press insertion with or without metal knurling to assist rubber to metal grip and 'cold bonding' IE glueing the rubber in. Curing of the adhesive is sometimes accelerated by 'post press vulcanisation' similar to cooking the rubber and adhesive in an oven. These methods generally have limited bond strength and resistance to spinning under high torque forces. The action of the inertia ring can also degrade the rubber metal contact particularly when the metal surfaces are knurled.
SFI ring retention devices such as retaining lips and circlips are critical for safety using these methods as there is effectively no other force holding the components together other than interference fit.
Pressure bonding is the most time consuming and secure method of damper assembly used by prestige and performance carmakers such as Mercedes Benz, BMW and Porsche. Damper components are chemically primed and assembled in highly accurate pre-heated steel press dyes. Specifically formulated rubber is injected and cured in the mould until uptimum strength is achieved. This method gives unrivalled rubber to metal bonding strength, resistance to ring dislocation and control of rubber duro or elasticity. All POWERBOND dampers are assembled using state of the art pressure bonding methods.
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Assembly of dampers can result in severe run out conditions and eccentricity of rings and centres. One crude method of correcting this problem is to machine the balancer all over after assembly, but this only disguises any misalignment in the rubber and ring.
POWERBOND dampers are assembled with extremely accurate tooling, making post press machining unnecessary. Every balancer is dynamically balanced at the factory for total peace of mind.
All counterweighted POWERBOND RACE dampers have milled counterweights as close to factory balance specifications as possible. Integral counterweights are more secure than bolt in alternatives sed by some manufacturers.
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All new harmonic balancers manufactured by Precision Parts and sold using the brand name, 'Powerbond' are covered by warranty against faulty materials and workmanship. Precision Parts will replace this product without charge should it prove to be defective in the warranty period listed from the date of original purchase. Warranty period is twelve (12) months or 20,000km, whichever should occur first.
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| EXCLUSIONS TO THE WARRANTY |
Any non-standard applications and damage caused by incorrect handling and/or fitting or from misuse, abuse, accident or alteration of the product. This warranty is only applicable in Australia for product purchased through a Precision Parts authorised dealer.
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