How our brake discs are made?
Our brake discs are designed in a 3D CAD program, and calculated with an analysis module. Our discs are manufactured using the latest laser technology. Subsequently, the brake discs are deburred, and subjected to a special heat treatment and precision grind. This heat treatment increases the stability of the brake disc, while minimizing its wear. In addition, the resilient properties of the material used are reinforced, which minimizes the possibility of bending.
What is the thickness of our brake discs and when is the wear limit reached?
The standard thickness of the brake discs is 1.95 +/- 0.015 mm. On customer request, I can produce the brake discs in thicknesses from 1.80 mm to 2.95 mm. Thicknesses over 3 mm are also possible on request. The wear limit up to which our brake discs can be used is 1.65 mm! If this limit is reached, the brake disc must be disposed of and replaced with a new one. When changing the brake disc, I recommend changing the brake pads at the same time.
Is it possible to provide a self-made design of a brake disc?
Yes! There are two possibilities:
1. We get a CAD data file with the desired design or,
2. We get a sketch from which we produce a CAD data file ourselves.
The following interfaces are available for the CAD data files: STEP, SAT, IGES, DWG and DXF.
For the sketch you just fill out the following document (PDF) and fax it to the following number: +49 (0)3212 1369554.
What is important for a self-made design, however, is to find the functionality. For example to check safety and feasibility, and make changes where necessary.
Why are there sharp edges on our brake discs?
The sharp edges on the inside of our brake discs are completely normal. No brake disc around the world is deburred - on the contrary: There are always holes in the friction ring which necessarily have a sharp edge, so that they can clean the covering. The fact that the bridges get a sharp edge is, of course, not so pretty, but this has no functional disadvantage.
Only the very cheap pads made by Shimano ("resin only") look deburred and have quite round edges, at least on one side. This comes from punching (most discs are punched) and because they are cheap (only those!) Shimano's are not sanded after punching.
To be on the safe side, three small pressure points on the brake disc - why?
On each of our brake discs at least one small pressure point can be seen in the area of the braking holes, why? This pressure point is produced during the stiffness test. Each of our brake discs is subjected to a stiffness test after the heat treatment so that the minimum hardness is reached but not exceeded. This is an important quality criterion for a safety-related component, such as a brake disk.
What material are our Canti Studs / Brake Bosses?
Our canti studs are CNC machined and available in the following stainless materials:
- stainless steel and
- high strength aluminum.
How and with which torque do the canti studs need to be attached?
Before installing the Canti Socket, clean the hole and the bearing surface on the fork / frame properly and allow to dry. To attach, apply a few drops of bolt securement medium (eg Loctite 243) to the thread of the Canti Socket and then screw in with a torque between 5-6Nm.
Important: Before the first outing with the newly installed brakes wait 2-3h until the screw securing at the cantis base is almost completely hardened and safe.