Supporting disk
A supporting disk for providing bearing support to a rotor of an open-end spinning machine includes a hub ring ( 1 ) and a supporting ring ( 2 ) that surrounds the hub ring ( 1 ) at least partially with radial clearance. The hub ring ( 1 ) and the supporting ring ( 2 ) each are made of a polymer material, and the hub ring ( 1 ), at least on its outer peripheral surface ( 3 ), has a metal coating ( 5 ) which is located at least partially in the gap ( 4 ) formed by the clearance, and which contiguously adjoins the inner circumferential surface ( 6 ) of the supporting ring ( 2 ), and extends axially up to at least one of the end faces ( 7, 8 ) of the supporting disk.
1. A supporting disk for providing bearing support to a rotor of an open-end spinning machine, the supporting disk having two end faces, the supporting disk comprising:
a hub ring having an outer peripheral surface; and
a supporting ring surrounding the hub ring at least partially with radial clearance to form a gap, the supporting ring having an inner circumferential surface, the hub ring and the supporting ring each being made of a polymer material,
the hub ring, at least on the outer peripheral surface, having a metal coating located at least partially in the gap, the metal coating contiguously adjoining the inner circumferential surface of the supporting ring and extending axially to at least one of the end faces of the supporting disk.
2. The supporting disk a recited in claim 1 wherein the outer peripheral surface of the hub ring is completely covered by the metal coating.
3. The supporting disk as recited in claim 1 wherein the hub ring has hub end faces, at least one of the hub end faces being covered by the metal coating.
4. The supporting disk as recited in claim 3 wherein both hub end faces are covered by the metal coating.
5. The supporting disk as recited in claim 1 wherein the hub ring has a hub inner circumferential surface at least partially covered by the metal coating.
6. The supporting disk as recited in claim 1 wherein an entire outer surface of the hub ring is covered by the metal coating, the entire outer surface including the outer peripheral surface.
7. The supporting disk as recited in claim 1 wherein hub ring has a hub inner circumferential surface having at least one radially inwardly open groove and further comprising a congruently shaped annular insert of tough, hard material in the open groove.
8. The supporting disk a recited in claim 7 wherein the insert is made of a metallic material.
9. The supporting disk as recited in claim 7 wherein the hub ring and the insert form one preassembly unit.
10. The supporting disk as recited in claim 7 wherein the insert and the metal coating are made from compatible materials.
11. The supporting disk as recited in claim 1 wherein a thickness of the metal coating is, at most, 3 mm.
12. The supporting disk as recited in claim 11 wherein the thickness of the metal coating is 0.001 to 1.0 mm.
13. The supporting disk as recited in claim 1 wherein the metal coating is formed altogether as a single-layer coating.
14. The supporting disk as recited in claim 1 wherein the metal coating is formed as a multi-layered coating.