# US 12,760,766 B2 · Rolling bearing and method of manufacturing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,760,766 B2 - Document ID: US12760766B2 - Status: Granted - Kind: B2 - Application number: 18/766,993 - Filed: 2024-07-09 - Published: 2025-01-30 - Granted: 2026-10-13 - Earliest claimed: 2023-07-26 - Assignees: Aktiebolaget Skf - Applicants: Aktiebolaget Skf - Inventors: Xiaobo Zhou; Thijs Nijdam; Andreas Vierling; Frank Henninger; Bo Shen; Lijun Cao; Victor Brizmer; Yafen Chen; Hongyuan An - Web page: https://patentgrep.com/patent/US12760766B2 ## CPC - F16C 33/6696: {with solids as lubricant, e.g. dry coatings, powder} - F16C 33/586: {outside the space between the races, e.g. end faces or bore of inner ring} - F16C 2202/02: Mechanical properties - F16C 2202/30: Electric properties; Magnetic properties - F16C 2202/54: Molybdenum disulfide - F16C 2226/40: with adhesive - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS ## Abstract A rolling bearing includes an outer ring having an outer surface configured to be fitted into a first component, an inner ring having an inner surface configured to be fitted onto a second component, at least one rolling element arranged between the outer ring and the inner ring, and a polymer composite sheet bonded to the outer surface of the outer ring and/or to the inner surface of the inner ring by a bonding agent. ## Claims ### Claim 1 A rolling bearing comprising: an outer ring having an outer surface configured to be fitted into a first component, an inner ring having an inner surface configured to be fitted onto a second component, at least one rolling element arranged between the outer ring and the inner ring, and a first polymer composite sheet bonded or adhered directly to the outer surface of the outer ring by a layer of bonding agent and/or adhesive and/or a second polymer composite sheet bonded or adhered directly to the inner surface of the inner ring by a layer of bonding agent and/or adhesive, wherein the first and/or second polymer composite sheet is an extruded material having a uniform thickness of 2 to 200 μm. ### Claim 2 (depends on 1) The rolling bearing according to claim 1, wherein the first and/or second polymer composite sheet has a thickness of 5 to 30 μm. ### Claim 3 (depends on 1) The rolling bearing according to claim 1, wherein the first and/or second polymer composite sheet comprises polyether ether ketone (PEEK), polyphenylene sulfide (PPS), polyester (PET), polyurethane (TPU), polyethylene (PE), polypropylene (PP), polyimide (PI), and/or polyamideimide (PAI). ### Claim 4 (depends on 1) The rolling bearing according to claim 1, wherein the first and/or second polymer composite sheet comprises 1 to 50 wt % of at least one solid lubricant. ### Claim 5 (depends on 1) The rolling bearing according to claim 1, wherein the first and/or second polymer composite sheet comprises 5 to 20 wt % of at least one solid lubricant. ### Claim 6 (depends on 5) The rolling bearing according to claim 5, wherein the solid lubricant is molybdenum disulfide (MoS2). ### Claim 7 (depends on 1) The rolling bearing according to claim 1, wherein the bonding agent is an epoxy adhesive or a cyanoacrylate glue. ### Claim 8 (depends on 1) The rolling bearing according to claim 1, wherein a thickness of the bonding agent is less than 25 μm. ### Claim 9 (depends on 1) The rolling bearing according to claim 1, wherein the first and/or second polymer composite sheet has an acrylic adhesive or a silicone on one side. ### Claim 10 (depends on 1) The rolling bearing according to claim 1, wherein a side of the first and/or second polymer composite sheet that is bonded or adhered to the outer ring and/or the inner ring, respectively, is chemically or plasma etched. ### Claim 11 (depends on 1) The rolling bearing according to claim 1, wherein the first and/or second polymer composite sheet has a dielectric strength greater than 15 kv/mm and a dielectric constant of lower than 4. ### Claim 12 (depends on 1) The rolling bearing according to claim 1, wherein: the first and/or second polymer composite sheet has a thickness of 5 to 30 μm, the first and/or second polymer composite sheet comprises polyether ether ketone (PEEK), polyphenylene sulfide (PPS), polyester (PET), polyurethane (TPU), polyethylene (PE), polypropylene (PP), polyimide (PI), and/or polyamideimide (PAI), and the first and/or second polymer composite sheet comprises 5 to 20 wt % molybdenum disulfide (MoS2). ### Claim 13 (depends on 1) An assembly comprising: the rolling bearing, the first component and the second component according to claim 1, wherein: the first polymer composite polymer sheet is directly adhered or bonded to the outer surface of the outer ring, the outer ring is fitted into the first component and the first polymer composite sheet directly contacts the first component, the first component is a housing composed of an aluminum alloy, the first composite sheet has a coefficient of friction in dry contact against the aluminum alloy of the first component in the range of 0.05 to 0.4, the first polymer composite sheet layer has a relative permittivity of less than 4, and the inner ring is mounted on the second component, which is a rotatable shaft. ### Claim 14 A method for manufacturing a rolling bearing comprising: providing an outer ring having an outer surface configured to be fitted into a first component, the outer ring having a surface roughness Ra of 0.5 to 10 μm, providing an inner ring having an inner surface configured to be fitted onto a second component, providing at least one rolling element arranged between the outer ring and the inner ring, providing a first polymer composite sheet that is an extruded material having a uniform thickness of 2 to 200 μm and has an adhesive on a first side of the polymer composite sheet, and applying the first polymer composite sheet to the outer surface of the outer ring such that the adhesive directly bonds the first polymer composite sheet to the outer surface of the outer ring. ### Claim 15 (depends on 14) The method according to claim 14, wherein the method further includes, before applying the adhesive to the first polymer composite sheet, pretreating the first side of the polymer composite sheet using chemical etching and/or plasma etching. ### Claim 16 (depends on 14) The method according to claim 14, wherein the first polymer composite sheet is composed of polyether ether ketone (PEEK) or polyphenylene sulfide (PPS). ### Claim 17 (depends on 14) The method according to claim 14, wherein the first polymer composite sheet comprises 1 to 50 wt % of at least one solid lubricant. ### Claim 18 (depends on 17) The method according to claim 17, wherein the solid lubricant is molybdenum disulfide (MoS2). ### Claim 19 (depends on 14) The method according to claim 14, wherein the adhesive has a thickness of less than 25 μm.