Abstract: This sealing device has an annular metal core portion and an annular elastic portion. The elastic portion has a thick portion and a thin portion which extends from the thick portion in an axial direction of the elastic portion and has a thinner thickness in a radial direction than the thick portion. A fixed lip is provided on an inner peripheral surface of the thick portion, and a sliding lip is provided on an inner peripheral surface of the thin portion.

Abstract: This sealing device has an annular metal core portion and an annular elastic portion. The elastic portion has a thick portion and a thin portion which extends from the thick portion in an axial direction of the elastic portion and has a thinner thickness in a radial direction than the thick portion. A fixed lip is provided on an inner peripheral surface of the thick portion, and a sliding lip is provided on an inner peripheral surface of the thin portion.

Abstract: A polishing jig of a hydraulic integral system is improved to increase efficiency. A polishing jig 1 for bearing for use in back-up roll of rolling mill including a shaft member 2 on which an inner ring 104 of a bearing 100 for use in back-up roll of rolling mill is fitted; and a pressure-oil chamber 12 operative in association with the feeding of a pressure oil into the shaft member 2 to protrude an outer circumferential part of the shaft member 2 radially outwardly, the polishing jig includes an inner-ring fixing portion 16 for axially fixing individual inner rings 104 of a plurality of the bearings 100 fitted on the shaft member 2 as axially arranged, wherein a plurality of the pressure-oil chambers 12 are formed internally of the shaft member 2 in correspondence to the plural bearings 100 fixed on the shaft member 2.

Abstract: A polishing jig of a hydraulic integral system is improved to increase efficiency. A polishing jig 1 for bearing for use in back-up roll of rolling mill including a shaft member 2 on which an inner ring 104 of a bearing 100 for use in back-up roll of rolling mill is fitted; and a pressure-oil chamber 12 operative in association with the feeding of a pressure oil into the shaft member 2 to protrude an outer circumferential part of the shaft member 2 radially outwardly, the polishing jig includes an inner-ring fixing portion 16 for axially fixing individual inner rings 104 of a plurality of the bearings 100 fitted on the shaft member 2 as axially arranged, wherein a plurality of the pressure-oil chambers 12 are formed internally of the shaft member 2 in correspondence to the plural bearings 100 fixed on the shaft member 2.

Abstract: A polishing jig of a hydraulic integral system is improved to increase efficiency. A polishing jig 1 for bearing for use in back-up roll of rolling mill including a shaft member 2 on which an inner ring 104 of a bearing 100 for use in back-up roll of rolling mill is fitted; and a pressure-oil chamber 12 operative in association with the feeding of a pressure oil into the shaft member 2 to protrude an outer circumferential part of the shaft member 2 radially outwardly, the polishing jig includes an inner-ring fixing portion 16 for axially fixing individual inner rings 104 of a plurality of the bearings 100 fitted on the shaft member 2 as axially arranged, wherein a plurality of the pressure-oil chambers 12 are formed internally of the shaft member 2 in correspondence to the plural bearings 100 fixed on the shaft member 2.

Abstract: A polishing jig of a hydraulic integral system is improved to increase efficiency. A polishing jig 1 for bearing for use in back-up roll of rolling mill including a shaft member 2 on which an inner ring 104 of a bearing 100 for use in back-up roll of rolling mill is fitted; and a pressure-oil chamber 12 operative in association with the feeding of a pressure oil into the shaft member 2 to protrude an outer circumferential part of the shaft member 2 radially outwardly, the polishing jig includes an inner-ring fixing portion 16 for axially fixing individual inner rings 104 of a plurality of the bearings 100 fitted on the shaft member 2 as axially arranged, wherein a plurality of the pressure-oil chambers 12 are formed internally of the shaft member 2 in correspondence to the plural bearings 100 fixed on the shaft member 2.

Abstract: Apparatus for use in a disc player comprises a loading and unloading mechanism for performing selectively a disc loading operation in which a disc inserted into the disc player through an opening for disc insertion is carried to and loaded on a disc rotating device and a disc unloading operation in which the disc is unloaded from the disc rotating device, returned to the opening, and positioned therein with a portion of the disc protruding through the opening. If the disc is accompanied by a protective disc case engaged in the opening, the portion of the disc protruding through the opening is received within the case. If the disc is not accompanied by a disc case, the portion of the disc protruding through the opening is exposed to the outside of the disc player and may collect dirt, become damaged, etc.