Tail Hole Copper Welding VS Flat Bottom Silver Welding

There are currently two main welding methods in the market: flat-bottom tail-hole copper brazing and silver brazing. Let's briefly describe the advantages and disadvantages of these two welding methods, which may help customers make a better choice.

Tail Hole Copper Welding
• Advantages:Lower cost,larger contact area for welding,theoretically higher strength.
• Disadvantages:Complex welding process, high welding temperature(about 1100°C), significant impact on tool structure, potential for performance instability. High temperature can cause cracks in the hard alloy, concentrated welding stress, and greater quality fluctuation.

Flat Bottom Silver Welding
•Advantages: Simple welding structure, low welding stress, lower required welding temperature(about 800°C), better preservation of the performance of both the alloy “head” and the steel shank. Higher welding strength, more stable quality, better durability. The core design effectively reduces welding stress and eliminates microcracks.
• Disadvantages:Higher cost.

If high performance,high-speed operation,and long service life of the hard alloy rotary file are required,flat bottom silver welding is recommended.Although it is slightly more expensive,it provides better stability and reliability.If cost is a concern and the usage scenario does not have high requirements for tool performance,tail hole copper welding is also an option to consider.