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Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..

Blade grinded with a square section then twisted in order to obtain cutting power and flexibility. Helix angle higher than on reamer. Conicity of 2%. ..