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By certification 
This Core Drill Brazing Machine is an easy-to-use method to accurately braze diamond segments on a wide size range of core barrel sizes. It is equally useful for re-tipping used barrels. The high frequency induction heating unit quickly silver brazes the segments in 3-7 seconds. Over-heating the segment diamonds is avoided. Forward pressure applied against the diamond segment during brazing results in very high bond strength. Diamond segment offset positioning is highly accurate and segment concentricity is superior as a result of the adjustable 5-point barrel fixturing system. Silver solder consumption is reduced to a minimum.
Usage: for welding the diamond segments, core bit cemented carbide tools and small metal items.
http://www.fldiamondtools.com/
