Method of making a bearing for spindles of spinning or twisting machines

Abstract

In the case of a bearing for spindles of spinning or twisting machines, which contains a spindle bearing housing, a bolster, a centering tube, a pivot bearing and a step bearing sleeve, it is provided that a predetermined bearing play of the step bearing sleeve is adjusted to a desired dimension by maching the radial interior surface of the step bearing sleeve while the sleeve is already mounted in the centering tube.

What is claimed: 
     
       1. A process for manufacturing a bearing for spindles of spinning of twisting machines, said bearing including a spindle bearing housing, a bolster contained in the spindle bearing housing and surrounding a bolster bearing for engagably supporting a spindle shaft at its circumference, a step pivot bearing for engagably supporting an end of a spindle shaft, a centering tube fastened to the spindle bearing housing in proximity to the bolster and including means for holding the step pivot bearing, said centering tube having interior surfaces, and a step bearing sleeve having interior and exterior surfaces, said sleeve is held in the centering tube and serving to radially locate a section of a spindle adjacent its end supported at the step pivot bearing, said process comprising: mounting the step bearing sleeve in the centering tube, and subsequently adjusting radial step bearing play of the step bearing sleeve with respect to a spindle to be supported thereat while the step bearing sleeve is mounted in the centering tube by machining radially interior surfaces of the step bearing sleeve,   whereby tolerance deviations at the centering tube and mounting tolerances for the step bearing sleeve at the centering tube do not adversely affect the step bearing play adjustment while permitting economical manufacture of the bearing.   
     
     
       2. The process according to claim 1, wherein the distance (L) between the bolster and the step pivot bearing is no more than 100 mm. 
     
     
       3. The process according to claim 1, wherein a taper ratio of approximately 1:50 is provided for the interior surfaces of the centering tube and the exterior surfaces of the step bearing sleeve. 
     
     
       4. The process according to claim 1, wherein the diameter (D) for the spindle shaft in the area of the bolster amounts to maximally 7 mm. 
     
     
       5. The process according to claim 1, wherein the centering tube is provided with a seat for a bearing outer ring of the bolster. 
     
     
       6. The process according to claim 1, further comprising holding said pivot bearing axially and radially in said centering tube. 
     
     
       7. The process according to claim 1, wherein the centering tube, in an area connected to the seat of the bolster, is provided with an increased wall thickness, which is held in the spindle bearing housing by press-fitting. 
     
     
       8. The process according to claim 7, wherein the bolster is housed in a head bearing sleeve which is connected with the centering tube by press-fitting and which, in turn, is held in the spindle bearing housing by press-fitting. 
     
     
       9. The process according to claim 8, wherein the centering tube is constructed as a preassembled constructional unit with the bolster, the pivot bearing and the step bearing sleeve. 
     
     
       10. The process according to claim 1, wherein the bolster is housed in a head bearing sleeve which is connected with the centering tube by means of a press fit and which, in turn, is held in the spindle bearing housing by press-fitting. 
     
     
       11. The process according to claim 1, wherein the centering tube is constructed as a preassembled constructional unit with the bolster, the pivot bearing and the step bearing sleeve. 
     
     
       12. The process according to claim 1, wherein the step bearing sleeve has a slightly conical exterior surface to which a corresponding slightly conical interior surface of the centering tube is assigned.