Fixing Friction Material on Clutch Discs: Common Methods and Considerations
When discussing the installation of friction material on clutch discs, several methods are employed. Rivets are often the default choice, but innovative designs have also emerged over time. This article will explore the different methods used to secure friction material to clutch discs, with a focus on the pros and cons of each.
Traditional Method: Rivets
For many years, rivets have been the go-to method for attaching friction material to clutch discs. This approach is reliable and has stood the test of time. Rivets are small solid fasteners that are inserted and fixed through holes in the friction material and pressed into the clutch disc to secure them in place.
From personal experience, I've replaced clutch plates where the rivets were actually cork pressed into the lining and metal plate. This was particularly common on Leyland heavy vehicles. The use of cork increased the surface friction area and prevented wear grooves from collecting dust at the rivet heads.
One interesting note is that the friction material often wears out before the cork fails. This highlights the importance of the quality of both the friction material and the rivets used in the construction.
Alternative Method: Bonding
While riveting is the more traditional method, bonding has become a popular alternative. Some manufacturers prefer this approach due to its simplicity and ease of application. Bonding involves using a high-temperature adhesive to attach the friction material to the clutch disc.
However, my preference has always been for riveted components. I have noticed that bonded ones often come from the cheaper, possibly lower quality, aftermarket sources. It's crucial to ensure that the adhesive used is of high quality and can withstand the intense temperatures and mechanical stresses during operation.
It's worth noting that bonded components often lack the durability and longevity of their riveted counterparts. While they might be easier to install, they may not perform as well over the long term.
Conclusion and Summary
When it comes to securing friction material to clutch discs, both rivets and adhesives have their place. Rivets offer a durable and reliable solution that has stood the test of time. On the other hand, bonding can be a simpler and more cost-effective option but may not match the longevity and performance of riveted components.
In my experience, it is best to choose riveted components, especially for heavy-duty vehicles where reliability is crucial. The use of high-quality adhesives can provide a viable alternative in certain circumstances, but it's important to weigh the long-term benefits against the initial installation costs and potential performance issues.
Regardless of the method chosen, ensure that the friction material and fastening method are designed to handle the specific demands of the application. This will help ensure that the clutch disc operates efficiently and safely for as long as possible.