Friction Materials/

Clutch Materials

Clutch materials encompass a wide variety of durable and heat resistant substances used in the construction of devices used to connect the engine of a vehicle to the transmissions input shaft allowing the temporary separation needed to shift gears and coast. Clutch systems that utilize these materials are made up of several components such as clutch facing, pressure plates, clutch discs, and flywheels. The many different mechanical parts require many different materials. Likewise, the myriad of applications for clutches necessitates variable construction.

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Cook Bonding & Manufacturing Co., Inc.
Cleveland, OH
800-626-6540
Serving the heavy duty industrial community for over 29 years, Cook Bonding & Manufacturing is your single source for all friction related products, materials and accessories. With a long commitment to the industry and producing high quality goods like clutch materials, gear tooth facings and crane break shoes, Cook Bonding is ready to help find your company a friction solution.
 
ProTec Friction Supply
Mount Kisco, NY
914-244-3600
As a US-based worldwide producer of reliable solutions for the most demanding friction applications and environments, including on/off highway, agriculture, construction, assembly line and specialty applications, ProTec Friction Supply is a well respected company. Since 1988, they have been manufacturing high quality clutch materials and woven roll lining, to name just a few.
 
Global Friction Products, Inc.
Tampa, FL
877-285-2700
The team of expert machinists and welders at Global Friction Products are able to repair rusted or bent friction inducing bands with usable lug ends in addition to fabricating the bands back to original condition as well as creating new friction components like clutch materials. Combined with their stellar customer service department, customers can trust they will get quality goods and services.
 
CECO Friction Products, Inc.
Landis, NC
800-633-1880
Founded in 1973, CECO Friction Products is a friction components manufacturer offering asbestos free friction components in the form of clutch materials, brake assemblies and kits, clutch bands, drum linings, etc. Top quality products and materials as well as service are what you can expect at CECO. We serve off-highway and on-highway vehicles, military applications and heavy duty industrial.
 
GMP Friction Products
Akron, OH
330-633-1226
For more than 80 years, GMP Friction Products has provided many answers to tough problems in controlling, stopping or transmitting power; but the future always brings new technology and new challenges. We develop friction solutions, like clutch materials, to meet the unique needs for each application, in order to fulfill the high expectations that our customers place on their final product.
 
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Industry Information

Clutch Materials

Clutch materials are used in automotive, railway, transit coach, motorcycle, construction machinery and agricultural industries to help control speed and gear shifting in vehicles ranging from tractors to race cars. No matter the size or specific part, there are general guidelines for clutch materials. These materials must be strong and able to resist wear effects as might be accrued from scoring, galling and ablation. As shifting gears generates heat as a byproduct, these materials must account for thermal expansion and remain constant at a range of temperatures, have high heat capacity, good thermal properties and conductivity. These systems inherently deal with a great deal of pressure making the ability to withstand high contact pressures essential to their functionality. Clutch apparatus may be exposed to the environment and must be able to endure moisture, dust and other environmental factors while continuing to provide consistent clutch engagement and disengagement. Many, but not all, components are subject to frequent friction. These particular components must exhibit all of the above qualities while also maintaining a high coefficient of friction, which is the ratio of the force of friction between two bodies in contact with one another. These friction materials are often rough or textured to provide added friction and increase efficiency.

In general, the compression of a clutch pedal or lever causes several springs connected to a pressure plate to compress as well. This pulls the plate, and connected clutch disc, away from the flywheel which is bolted to the engines crankshaft. The disconnection stops the rotation of the clutch disc which intern disconnects the central hub of the disc from the input shaft. The driver may then shift gears or coast. After shifting, the pedal is released and the clutch disc reengages the flywheel. The clutch system works to ensure consistent clutch engagement and disengagement. Among the high stress but low friction components such as the pressure plate, steel, cast iron, aluminum and ceramics are common. While asbestos was once the most popular choice for elements encountering large amounts of friction, health hazards have lead clutch manufacturers to find alternatives. Ceramic, copper, steel, iron, mineral, cellulose, aramid, chopped glass, rubber and brass fivers are all used in the creation of composite materials used in clutches. These amalgamations are useful in that they retain the qualities, friction resistance and strength, of any and all powders and fibers used in their formation. These clutch materials are often attached via rivets or strong adhesives to metal bases. Field experience, as well as chemical and material engineering, allows constant advancements in clutch material design. These advancements result in reduced maintenance and operating costs, longer wear life, better functionality and overall consumer satisfaction.