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Half Round (Bull Nose) Router Bits - 1/2" Shank, Carbide Tipped - Whiteside 1434;
1/2" Radius, 1" Opening Of Cutter, 1-1/2" Cutting Length, 1-15/16" Large Diameter
Made in U.S.A. Whiteside (Actually Whiteside Machine) is regularly rated as #1 for cut quality and #1 for value by Fine Woodworking magazine.
Whiteside Machine was originally a machine shop, many decades ago. They were machining precision router bodies for a customer. The customer went broke leaving them sitting on the router bodies so they decide to finish them and sell them. This is a real All-American story of courage, resourcefulness, guts and just plain stubbornness.
Decades later they are still stubborn about absolutely top quality and beautiful tools.
Braze tools ( CT carbide tipped or TCT Tungsten Carbide Tipped ) Have a piece of expensive tungsten carbide brazed to a steel shaft. This gives you the incredible long wear of carbide (up to 100 times that of steel) and the toughness of a steel saw plate, router shaft, etc. It makes a clearly superior tool at a greatly reduced cost.
Brazing is the joining of two dissimilar materials through the use of a third material at temperatures above 800° F. (There are other definitions but they are all pretty close to this.)
Carbide brazing is done with a high silver braze alloy. The braze alloy (silver solder, high silver solder, high temp silver solder) is about 50% Silver. This makes it expensive but it is really worth it. Unlike other attachment methods, good brazing forms a mechanical and a chemical bond between the carbide and the steel so that the bond is much stronger than either the steel or the carbide. It also acts like a suspension on a car in that it cushions the hard carbide tool tip to protect it from chipping, breaking and excess wear.
*Please note that the above picture is a representation of the type of tool and may not accurately represent the actual size and dimensions.