The reputation for quality and reliability that Miba has earned through the production of sintered clutch buttons, is now available from AMS in sintered metallic clutch facings. Designed for heavy-duty and high-performance mid-range use, these bonded facings are manufactured using the same premier compound that Miba utilizes in button production.

Clutch designs for mid-range applications typically prohibit the use of sintered buttons. That’s because the rivet designs used to attach buttons to larger applications are incompatible with the rivet designs for most mid-range discs. In addition, the weight and mass of sintered buttons, along with the higher operating rpm’s of mid-range applications, combine to create unacceptable levels of disc inertia (clutch drag). This inertia normally leads to premature failure due to increased operational temperatures, warpage, chatter, and mating surface wear.


Using techniques similar to those employed in button production, Miba sinters friction material onto a lightweight aluminum backing plate. These backing plates are laser cut to a variety of sizes, based on the same FMSI patterns used for many of the popular organic facings found on mid-range applications. After the sintering and coining processes have been completed, rivet holes are drilled through the friction material and backing plate. The final step is to countersink the rivet holes in the friction material, so that the surface of the rivet heads will be below the surface of the friction material when the facings are riveted into place.

As a result of Miba sintered facing development, many applications used in situations that exceed normal operating conditions can now utilize the benefits of a material with superior compound consistency, stable/higher friction coefficient, superior flatness, higher burst strength, and greater resistance to high temperatures. These applications include street racing, towing, hauling, snow removal, commercial use, and off-road use. What’s more, Miba sintered facings are more resistant to engine, gear, tire, or suspension modifications that would previously have had a negative impact on the service life of the clutch system.

 

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