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techtalk:ref:wheels05 [2020/06/12 05:30] hippysmack [Brake Pad Break-in (burnishing)] |
techtalk:ref:wheels05 [2020/06/13 03:31] (current) hippysmack [Brake Pad Material] |
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| ====== Brake Pads - Aftermarket, Break-in etc ====== | ====== Brake Pads - Aftermarket, Break-in etc ====== | ||
| \\ | \\ | ||
| + | ====== Brake Pad Material ====== | ||
| + | |||
| + | **There are 3 common types of formulation for a brake pad friction material**. ((https://ebcbrakes.com/articles/what-is-brake-fade/)) \\ | ||
| + | * **Organic**: | ||
| + | * Organic brake pads inherit their name from the organic phenolic resins used to bind together the different compounds used in the pads construction. \\ There are countless different types of thermoset phenolic resin. \\ But they can all be generally considered to have a maximum temperature up to which they are thermally stable. \\ Above it's max operating temp, the phenolic resin binding agent becomes altered by heat. \\ And it effectively ‘boils’, expelling an appreciable volume of gas as it degrades. | ||
| + | * **Sintered metallic**: ((https://ebcbrakes.com/what-is-sintering/)) | ||
| + | * This is the fusing together under, heat and pressure, of metallic particles and blending of various other elements to enhance friction properties and wear life. \\ Although attempts were made by the OEMs to cut costs of Sintered brakes by using sintered IRON, that was deemed a failure and these days the base material is copper. | ||
| + | * The advantage of the sintered metal pads are that a more compact brake pad in size can be made which also has considerable durability advantages over its earlier stablemates. ((https://ebcbrakes.com/articles/how-to-make-brakes/)) This allows the brake caliper to be smaller and reduces the all important unsprung weight of a motorcycle. Sintered brakes are usually made from a copper alloy blend although sintered iron was tried with little success for cost reasons in the 90’s. | ||
| + | * **Semi-metallic**: | ||
| + | * These are a ‘hybrid blend’ of one and two above. \\ They have properties that typically lie somewhere in the middle of both. | ||
| + | |||
| ====== Brake Pad Break-in (burnishing) ====== | ====== Brake Pad Break-in (burnishing) ====== | ||
| The forgoing applies to factory brake pads and discs only. \\ | The forgoing applies to factory brake pads and discs only. \\ | ||
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| Different formulations of brake pads can therefore perform very differently from each other and it's important to use the right pad for the right application. \\ | Different formulations of brake pads can therefore perform very differently from each other and it's important to use the right pad for the right application. \\ | ||
| - | **There two very different kinds of brake fade** \\ | + | **There are two very different kinds of brake fade** \\ |
| - **Green fade or early life brake fade**: | - **Green fade or early life brake fade**: | ||
| * This is quite common and almost normal when new brake pads are fitted. \\ It is merely a settling down of the components after install and can be gone in a few brake applications. \\ To minimize or avoid this effect it is wise to drive cautiously when new brakes are fitted and give yourself a little extra braking distance for the bedding in period. \\ The bedding in period for new pads can be anywhere up to 500 miles urban use. | * This is quite common and almost normal when new brake pads are fitted. \\ It is merely a settling down of the components after install and can be gone in a few brake applications. \\ To minimize or avoid this effect it is wise to drive cautiously when new brakes are fitted and give yourself a little extra braking distance for the bedding in period. \\ The bedding in period for new pads can be anywhere up to 500 miles urban use. | ||
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| Additionally, if you are experiencing brake fade it does not necessarily mean you are using a brake pad of general poor quality. What it does mean is that you are operating the brake pad at conditions it was not designed to cope with and you consider upgrading to a higher performance pad (also check the brake caliper isn’t dragging). One of the key differences between low and high performance organic brake pads is the maximum temperature they can withstand before thermal deterioration of the friction lining becomes significant. I.e. the maximum temperature the brake pad can cope with before it begins to rapidly outgas, causing brake fade. \\ | Additionally, if you are experiencing brake fade it does not necessarily mean you are using a brake pad of general poor quality. What it does mean is that you are operating the brake pad at conditions it was not designed to cope with and you consider upgrading to a higher performance pad (also check the brake caliper isn’t dragging). One of the key differences between low and high performance organic brake pads is the maximum temperature they can withstand before thermal deterioration of the friction lining becomes significant. I.e. the maximum temperature the brake pad can cope with before it begins to rapidly outgas, causing brake fade. \\ | ||
| - | There are 3 common types of formulation for a brake pad friction material. \\ | + | |
| - | * Organic: | + | |
| - | * Organic brake pads inherit their name from the organic phenolic resins used to bind together the different compounds used in the pads construction. \\ There are countless different types of thermoset phenolic resin. \\ But they can all be generally considered to have a maximum temperature up to which they are thermally stable. \\ Above it's max operating temp, the phenolic resin binding agent becomes altered by heat. \\ And it effectively ‘boils’, expelling an appreciable volume of gas as it degrades. | + | |
| - | * Sintered metallic. | + | |
| - | * Semi-metallic: These are a ‘hybrid blend’ of one and two above. \\ They have properties that typically lie somewhere in the middle of both. | + | |
| - | + | ||
| ====== Caliper Lube ====== | ====== Caliper Lube ====== | ||
