Aufhauser has developed a range of copper-based brazing filler metals for brazing of rock drills and mining tools. In addition to these copper alloy filler metals, SilverAlloy silver brazing filler metals may also be used. These brazing filler metals must be capable of producing high strength joints that will be reliable in the most arduous of service environments. A range of applicable products is shown below.

Brazing of cemented tungsten carbide tools such as reamers, routers and rotary burrs is a specialist area. Selection of the brazing filler metal will be determined by factors such as the need to ensure adequate wetting of the filler metal and to avoid the possibility of cracking in the cemented carbide tip. Brazing filler metals containing nickel and or manganese have been shown to have improved wetting characteristics on cemented carbides that are difficult to wet. The thicker joints made with SilverAlloy A-49NiMn and LayerMet A-49NiMn as a 'rule of thumb' will be suitable on carbide segments of up to 20mm and 25mm respectively. Some of the specialized brazing filler metals for this type of component are listed here. For more information consult the frequently asked questions page in the technical section of this site or contact our technical department.