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They have toughened and hardened steel shanks that provide rigidity and strength. This prevents bending and reduces vibrations for an improved tool life. Ground to h6 (Carbide) and h7 (Steel).
Excellent impact strength that is able to withstand high forces and to withstand higher temperature without failing. Special brazing elements provide excellent braze strength.The Dormer Solid Carbide Rotary Burr - Cylinder Without Endcut has the following specification:
Shank Diameter: 6mm.
Working Length: 25mm.
Overall Length: 70mm.
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