One such issue is radial cracking at the mounting surface, which often occurs if the wrong drum is used, or if the hub surface isn't cleaned properly prior to drum installation. If radial cracks appear, the drum must be replaced, and technicians should ensure they’re using the correct drum for the application while thoroughly cleaning the hub piloting surface.
Another concern is oval-shaped drums, where variations in diameter can cause uneven wear on the brake linings. This distortion may result from excessive heat during braking or improper handling of the drums. It’s important to inspect drums regularly and avoid dropping or mishandling them during maintenance. If ovality is found, the drum must be replaced.
Excessive wear along the edges of the braking surface or around rivet holes can indicate the presence of abrasive materials in the braking system. This can be prevented by ensuring proper installation of dust shields, said Fras-le.
If dust shields are already in place but the issue persists, removing the lower shield can help prevent abrasive material build-up. Regular inspection is key to avoiding damage.
Fras-le said its brake drums are crafted with precision to ensure superior performance and reliability. Each drum undergoes an exact casting process, producing uniform wall thickness for consistent thermal expansion, minimising brake judder and vibration, and ensuring even brake stress distribution.
To guarantee quality, every batch is rigorously tested for metallurgical composition, hardness and tensile strength. Manufactured from high-grade cast iron, the drums are cooled at a constant controlled temperature for optimal hardness and durability.
In line with the highest standards, Fras-le brake drums are UN ECE R90:02 certified, meeting stringent regulations for braking performance, product integrity and manufacturing quality.
Designed to provide a smooth finish with sharp cutting tools, these brake drums deliver the reliable, high-quality performance expected from Fras-le.
