Bearing disk construction for supporting a spinning rotor shaft of an open-end spinning machine

Disk for a bearing assembly for spinning rotors of the type having four disks arranged in two pairs forming a wedge-shaped gap for supporting a shaft of said spinning rotor at outer rotor shaft support surfaces of the disk, said disk having a circumferential surface and an axial width,

• wherein the circumferential surface of said disk is provided with a ring groove for minimizing heat build up during use, said ring groove having an axial width, a radial depth, and side walls, and
• wherein the radial depth of the ring groove is greater than its axial width,
• wherein the axial width of the ring groove is between one-sixth and one-twelfth of the axial width of the disk,
• wherein said disk has a metallic disk-shaped body having a circumference and a ring-shaped fitting made from plastic material disposed around the circumference of the disk-shaped body to be directly supportingly engageable with a spinning rotor shaft, and
• wherein bevelled sections connect the side walls of the ring groove and the outer rotor shaft support surfaces of the disk.

Plastic ring-shaped fitting having a circumferential surface and an axial width for disposing around a circumference of a metallic disk-shaped body of a disk for a bearing assembly for spinning rotors of the type having four disks arranged in two pairs forming a wedge-shaped gap for supporting a shaft of the spinning rotor at outer rotor shaft support surfaces of the ring-shaped fitting,

• wherein the circumferential surface of said ring-shaped fitting is provided with a ring groove for minimum heat build up during use, said ring groove having an axial width, a radial depth, and side walls,
• wherein the axial width of the ring groove is between one-sixth and one-twelfth of the axial width of the ring-shaped fitting, and
• wherein the radial depth of the ring groove is greater than its axial width, and
• wherein bevelled sections connect the side walls of the ring groove and the outer rotor shaft support surfaces of the ring-shaped fitting.

Disk for a bearing assembly for spinning rotors of the type having four disks arranged in two pairs forming a wedge-shaped gap for supporting a shaft of the spinning rotor;

• wherein said disk has a metallic disk-shaped body with a circumference and an axial center, and a ring-shaped fitting made from plastic material disposed around the circumference of the disk-shaped body to be directly supportingly engageable with the spinning rotor shaft during use, said ring-shaped fitting having a circumferential surface, an axial width with an axial center, and a radial thickness,
• wherein said metallic disk-shaped body exhibits an anchoring groove at the circumference thereof,
• wherein the ring-shaped fitting protrudes into and is anchored at the anchoring groove,
• wherein the circumferential surface of said ring-shaped fitting is provided with a ring groove for minimizing heat build up during use, said ring groove having an axial width and a radial depth, and
• wherein said anchoring groove is offset from the axial center of the metallic disk-shaped body.