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FRICTION MATERIALS AND LININGS |
The type of friction material
that's used in a vehicle's brake system has a huge impact on noise, stopping power, fade resistance and wear of both the linings and rotors. The "right" material will provide the best possible combination of these factors without sacrificing too much of one thing for another. It's difficult to achieve the best of everything in a single friction complaints. The quieter, the better. But making brakes quiet isn't easy. A quiet compound may not be a long lasting compound. Reducing noise often involves sacrificing some pad life. Softer pads are quieter pads but don't wear as well, so other
strategies have to be employed to extend pad life. There are many different types of linings.
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The lining material is designed to create friction between the lining material on the pad or shoe and the brake disk or drum while minimizing damage to the drum or disk. Given this
requirement, there must be a high coefficient of friction more expensive disk/drum. The lining material must also dissipate heat or be
extremely heat resistant so that it doesn't fail under use. In short, the choice of lining material for a given application is based upon criteria such as the expected coefficient of
friction, fade resistance, wear resistance, ease of attachment, rigidity/formability, cost, abrasive tendencies on drum, etc. Linings traditionally were made from asbestos have led to the decline of its use. Non-asbestos linings generally consist of three components - metal fibers for strength,
modifiers to improve heat conduction, and a phenolic matrix to bind everything together. |
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| Desired Properties of composite friction materials used in Brake Linings and Clutch facings : |
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The composite material should posses high structural integrity. |
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The material should posses excellent heat stability and should be gentle on the mating surface. Performance
shouldn't vary over wide range of duly cycles. |
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Composite should be designed for severe service at elevated t
temperature with heavy loads. |
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Must posses qualities of smooth progressive braking, long service life, kindness to the drums and consistency of performance. |
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Must deliver high coefficient of friction and higher load-carrying torque in heavy duty and high performance applications or increased torque at lower air pressure. |
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"Durabond" Steelwool Fibers/Powder |
Durabond Fibers - metallic fibers are produced using a specialized cutting process with precision tooling. The particle/fiber repartition analysis is verified as per IS 5461:1984 (reaffirmed 1997). In addition to having control over fiber uniformity, we have complete control over the oil
content of the composite as per IS 11506:2004. Our Quality control imparts uniform density & superior matrix bonding characteristics which helps in increasing braking strength/power and product life. |
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Material Specifications |
Chemical Composition (%) |
C |
0.07 - 0.12 |
Mn |
0.20 - 0.60 |
Si |
0.08 - 0.60 |
P |
<0.5 |
S |
<0.05 |
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Physical
Properties |
Specific density (g/ccm) |
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Apparent volume (ccm/100g) |
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Compressed volume (ccm/100g) |
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Acetonic extract(%) |
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| *As per customer requirement. |
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Screen Analysis ** |
Sieve No. (B.S.S.) |
Sieve No. (B.S.S.) |
22 |
0.3 |
44 |
12.5 |
60 |
9.6 |
85 |
6.4 |
100 |
7.8 |
150 |
12.04 |
PAN |
51 |
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Packing |
20 kgs - Non-woven HDPE sacks with inner lining. |
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Safety Instuctions |
Respiratory and Eye protection gear is recommended while handling |
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Technical Manual |
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