The cladding materials used must meet the requirements specified by the manufacturer of the original elements or be of a quality approved by the KBA. Textar brake linings are available in a wide range for virtually every application. Rivet Material: The most commonly used materials are steel, brass and copper.
You should choose rivets with a shape that matches the shape of the holes. The length of the rivets can be calculated according to the formula: 3575 semi-tubular rivet A = 0.5 – 0.75 * d DIN 7338 tubular A = 0.8 – 1.0 * d Example: In the case of a rivet for fastening brake linings according to DIN 7338 with a diameter of d = 8 mm the shank of the rivet A should not protrude from the hole in the jaw by less than 0.8 x 8 mm = 6.4 mm and more than 8 mm.
Important note:
For semi-tubular rivets, the base of the hole must be at position "A" to properly form the head.
Selection of the correct crimp and anvil. Please follow the instructions provided by the riveter manufacturer. Some vehicle manufacturers require that the brake linings be pressed onto the shoes with a pre-tension of 300 N before riveting. This requirement is met by special pre-tensioning clamps offered by Textar, which fit almost all commonly used riveting machines. The forces exerted during riveting are very equal and depend on the type of rivet and the materials being joined. Therefore, the pressures specified by the brake manufacturers must be carefully observed. The relationship between the applied pressure and the resulting riveting force varies depending on the type of machine. Riveting should always be done from the inside out, i.e. start from the center of the jaw and work towards its edges.
Riveting Inspection: Light blows with a hammer can be used to check whether the riveting is in good or bad condition. A dull sound means the linings are loose. A clear sound means the riveting is correct. You can use a valve gauge to check whether there are any voids under the lining. A space above 0.15 mm that runs deeper than the first row of rivet holes may cause noise. Finally, all cladding should be checked for cracks. If they occur in the area of the rivets, they indicate incorrect processing.
