Patent ID: 6179512
Filing Date: 2001-01-30
Classification: B23B,Y10S,Y10T

Abstract:
A collet nut for holding a collet in a tapered chamber of a collet holder, said collet nut comprising:a nut member having a threaded inner diameter bore engageable with threads on a collet holder;a sleeve member rotationally coupled to said nut member during a first tightening mode of said collet nut;a collet engaging member configured to engage a forward end of a collet seated in a chamber of a collet holder, said nut member threadedly advanceable on a collet holder upon rotation of said sleeve member to cause said collet engaging member to engage a collet seated therein;an annular ring rotationally coupled to said sleeve member and rotationally coupled to said nut member during said first tightening mode;facing ramped bearing surfaces defined between opposing faces of said annular ring and said nut member, and bearing devices seated in said ramped bearing surfaces; andwherein in said first tightening mode said sleeve member, said nut member, and said annular ring rotate as a unit, and in a second tightening mode said sleeve member and said annular ring rotate relative to said nut member so that opposing high sections of said ramped bearing surfaces are brought rotationally closer together thereby forcing said annular ring axially away from said nut member which imparts an additional axial force through said collet engaging member to a collet held within said collet nut.