High speed drill holders
AssigneeWestwind Air Bearings Ltd.
InventorMichael C. Tempest
Life of this patent
Estimating the term…
Abstract
A collet for carrying a high-speed drill which comprises a collar (2) arranged to enclose a drill shank (1), an outer rim support (8) arranged for attachment to a drill, and a clamping mechanism between the collar and the outer rim support (8). The clamping mechanism is arranged to provide clamping forces between said outer rim support (8) and said collar so that said collar tightly grips a drill shank (1), as a consequence of cenrifugal forces and of off center sprag effect forces.
Claims7
A drill holder, for example a collet or chuck, for carrying a high-speed drill, said drill holder comprising a collar arranged to enclose a drill shank, an outer rim support arranged for attachment to a drill, and a clamping mechanism between the collar and the outer rim support, said clamping mechanism being arranged to provide clamping forces between said outer rim support and said collar so that said collar tightly grips a drill shank, as a consequence of centrifugal forces and of off centre sprag effect forces and wherein the collar, outer rim support and clamping mechanism are integrally formed from a single piece of material.
A drill holder according to any preceding claim including siamesed pairs of connecting arms of rotationally opposed but similar shape so that the sprag forces will act in either direction of rotation.
Dependencies are inferred from the claim text.