Spindle assembly for machine tools and method of fabricating same
AssigneeThermwood Corporation
InventorsKenneth J. Susnjara, Kenneth L. Gwin, David A. Stutsman
Life of this patent
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Abstract
A spindle assembly for a machine tool generally consisting of a housing, a housing having a pair of bearing seats, roller bearings mounted in the bearing seats, the bearing seats being oversized relative to the outer races of the roller bearings, the outer races of the roller bearings being adhesively bonded to the housing in said bearing seats and a spindle mounted in the inner races of the roller bearings.
Claims25
A method of fabricating a high speed spindle assembly for a machine tool, including a housing, at least two bearings seated in said housing and a spindle mounted in said bearings, comprising:
- forming a pair of bearing seats in said housing slightly oversized relative to the outer dimensions of said bearings;
- mounting a first bearing on said spindle;
- inserting said spindle in said housing while adhesively bonding said first bearing in a first oversized bearing seat;
- and
- mounting a second bearing on said spindle while adhesively bonding said second bearing in a second oversized bearing seat whereby upon setting of the adhesive bonding between the bearings and the housing said bearings will be axially aligned and maintained in axial alignment.
A method of fabricating a high speed spindle assembly for a machine tool, including a housing having a longitudinal bore, at least two roller bearings each including inner and outer races seated in said housing and a spindle mounted in said bearings, comprising:
- machining a pair of outwardly opening bearing seats in said housing at the ends of said bore, slightly oversized relative to the outer diameters of the outer races of said bearings;
- press-fitted a first bearing on one end of said spindle;
- applying an adhesive bonding material to the first bearing seat and the outer race of said first bearing;
- inserting said spindle in said housing bore and seating said first bearing in said first bearing seat;
- applying an adhesive bonding material to the second bearing seat and the outer race of said second bearing;
- press-fitting said second bearing onto the free end of said spindle while inserting said second bearing in said second bearing seat;
- and
- allowing said bonding material to set whereby said bearings will be aligned axially.
A high speed spindle assembly for a machine tool comprising:
- a housing;
- said housing having a pair of bearing seats;
- roller bearings including inner and outer races mounted in said bearing seats;
- said bearing seats being oversized relative to the outer races of said roller bearings;
- said outer races of said roller bearings being adhesively bonded to said housing in said bearing seats;
- and
- a spindle mounted in the inner races of said roller bearings;
- whereupon said bearings will be axially aligned and maintained in axial alignment.
Dependencies are inferred from the claim text.