The friction material is generally glued onto the backing plate. In order to maximise the shear strength we use a variety of different bonding types, dependent on the weight and/or performance of the vehicle.
This is one the simplest bonding types. Following attachment to the backing plate, the friction material projects into the spigot hole, helping to increase the shear strength.
In this method small hooked spikes are machined onto the backing plate, in order to improve the attachment to the friction material and increase the shear strength.
This process is patented by TMD. The backing plate is fitted with spun-welded brass bolts, specially designed to increase the shear strength.