DE19612571A1 - Roller bearing without cage, for fast running medical instruments - Google Patents

Roller bearing without cage, for fast running medical instruments

Info

Publication number
DE19612571A1
DE19612571A1 DE19612571A DE19612571A DE19612571A1 DE 19612571 A1 DE19612571 A1 DE 19612571A1 DE 19612571 A DE19612571 A DE 19612571A DE 19612571 A DE19612571 A DE 19612571A DE 19612571 A1 DE19612571 A1 DE 19612571A1
Authority
DE
Germany
Prior art keywords
roller bearing
cage
rolling elements
ceramic
plastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19612571A
Other languages
German (de)
Inventor
Nicholas John Dowding
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHO Holding GmbH and Co KG
Original Assignee
FAG Aircraft Super Precision Bearing GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FAG Aircraft Super Precision Bearing GmbH filed Critical FAG Aircraft Super Precision Bearing GmbH
Priority to DE19612571A priority Critical patent/DE19612571A1/en
Publication of DE19612571A1 publication Critical patent/DE19612571A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/37—Loose spacing bodies
    • F16C33/3713—Loose spacing bodies with other rolling elements serving as spacing bodies, e.g. the spacing bodies are in rolling contact with the load carrying rolling elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/18—Flexible shafts; Clutches or the like; Bearings or lubricating arrangements; Drives or transmissions
    • A61C1/181—Bearings or lubricating arrangements, e.g. air-cushion bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/06—Elastic or yielding bearings or bearing supports, for exclusively rotary movement by means of parts of rubber or like materials
    • F16C27/066—Ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/32—Balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/62—Selection of substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/664—Retaining the liquid in or near the bearing
    • F16C33/6648—Retaining the liquid in or near the bearing in a porous or resinous body, e.g. a cage impregnated with the liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6696—Special parts or details in view of lubrication with solids as lubricant, e.g. dry coatings, powder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/10—Application independent of particular apparatuses related to size
    • F16C2300/12—Small applications, e.g. miniature bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2316/00—Apparatus in health or amusement
    • F16C2316/10—Apparatus in health or amusement in medical appliances, e.g. in diagnosis, dentistry, instruments, prostheses, medical imaging appliances
    • F16C2316/13—Dental machines

Abstract

The roller bearing without a cage has separate plastics roller bodies (4) between the ceramic roller bodies (3). They are impregnated with a lubricant, produce a lubricant and/or are of a self-lubricating material. The plastics rollers (4) are preferably of polytetrafluoroethylene (PTFE). The running rings (1, 2) are of a wear-resistant and corrosion protected material such as "Cronidur 30" (RTM).

Description

Die Erfindung betrifft ein käfigloses Wälzlager nach dem Oberbegriff des An­ spruchs 1.The invention relates to a cage-less rolling bearing according to the preamble of the saying 1.

Aus der US-PS 4,966,552 ist ein derartiges Wälzlager bekannt. Neben den Problemen die bei hochtourigen Lagern in Folge der Fliehkraft auftreten beste­ hen bei Lagerungen im medizinischen Bereich weitere, die sich dadurch erge­ ben, daß derartige Geräte oft desinfiziert werden müssen und die Lager somit chemisch aggressiven Stoffen und/oder Druck- und Hitzebehandlungen (Wasserdampf) ausgesetzt sind. Auch ist es wichtig, daß der zu behandelnde Patient nicht mit Stoffen aus dem Behandlungsinstrument (Schmieröl, Abrieb und ähnliches) in Berührung kommt. Deshalb wird in der US-PS 4,966,552 vor­ geschlagen, ein Wälzlager käfiglos auszubilden und mit Wälzkörpern aus Ke­ ramik zu versehen und das Lager nicht mit Schmiermittel zu versehen.Such a roller bearing is known from US Pat. No. 4,966,552. In addition to the Problems that occur in high-speed bearings due to centrifugal force are best more in storage in the medical field, which is the result ben that such devices often have to be disinfected and thus the camp chemically aggressive substances and / or pressure and heat treatments (Water vapor) are exposed. It is also important that the person to be treated Patient with substances from the treatment instrument (lubricating oil, abrasion and the like) comes into contact. Therefore, US Pat. No. 4,966,552 beaten to form a rolling bearing without a cage and with rolling elements made of Ke ramic and not to lubricate the bearing.

Damit sollen die sich aus dem speziellen Anwendungsfall im medizinischen Bereich ergebenden Schwierigkeiten behoben werden und Drehzahlen bis zu 300 000 1/min bei 2000 Stunden Lebensdauer erreichbar sein.This should result from the special application in medical Difficulties to be resolved and speeds up to 300 000 1 / min with a 2000 hour service life.

Die Verwendung von Keramikkugeln mag zwar einige der vorgenannten Pro­ bleme lösen, schafft aber andererseits wieder neue. So sind Keramikkugeln nicht nur teuer, sondern auch stark bruchgefährdet, insbesondere wenn sie bei hohen Geschwindigkeiten und stoßartigen Belastungen wie sie bei solchen Geräten auftreten, aneinander stoßen, wobei zu berücksichtigen ist, daß an der Berührstelle der Drehsinn der Kugeln gegeneinander gerichtet ist. Dies führt zu erhöhter Reibung und zu Verschleiß, der wiederum Abrieb ergibt und aufwen­ dige und teure Dichtungssysteme notwendig macht, um zu verhindern, daß der Abrieb mit dem Patienten in Berührung kommt.The use of ceramic balls may well be some of the aforementioned pro Solve problems, but on the other hand creates new ones. So are ceramic balls not only expensive, but also very vulnerable to breakage, especially when it comes to high speeds and shock-like loads such as those with such Devices occur, butt against one another, taking into account that at the Contact point of rotation of the balls is directed towards each other. this leads to increased friction and wear, which in turn results in wear and tear and expensive sealing systems necessary to prevent the Abrasion comes into contact with the patient.

Es ist deshalb Aufgabe der Erfindung, ein käfigloses Wälzlager der eingangs genannten Art so weiterzubilden, daß es die speziell im medizinischen Einsatz auftretenden Probleme, wie chemische und/oder thermische Desinfektion, Hochtourigkeit, Stoßbelastung, Dichtheit nach außen und niedrige Reibung und hohe Lebensdauer kostengünstig löst.It is therefore an object of the invention to provide a cage-free rolling bearing at the outset mentioned type so that it is specifically used in medicine problems that arise, such as chemical and / or thermal disinfection, High speed, shock load, tightness to the outside and low friction and cost-effective long life.

Dies gelingt mit einem Wälzlager, bei dem nach dem kennzeichnenden Teil des Anspruchs 1 zwischen den Keramikwälzkörpern einzelne Wälzkörper aus Plastik angeordnet sind, die mit einem Schmierstoff getränkt sind, Schmierstoff abgeben und/oder aus selbstschmierendem Werkstoff bestehen.This succeeds with a roller bearing, in which after the characteristic part of claim 1 between the ceramic rolling elements from individual rolling elements Plastic are arranged, which are soaked with a lubricant, lubricant deliver and / or consist of self-lubricating material.

Vorteilhaft ist es, jeweils zwischen zwei benachbarten Keramikwälzkörpern einen Wälzkörper aus Plastik anzuordnen, wobei sich Silicon Nitrid (Si₃N₄) als Keramikwerkstoff und Kugeln als Wälzkörper besonders bewährt haben. Als Werkstoff für die Plastikkugeln hat sich PTFE als günstig erwiesen. Ebenso ist es vorteilhaft, die Laufringe aus einem verschleißfesten und korrosionsge­ schützten Werkstoff wie z. B. Cronidur 30 zu fertigen, um auch unter erschwer­ ten Schmierungsbedingungen eine sichere Funktion zu gewährleisten.It is advantageous in each case between two adjacent ceramic rolling elements Arrange a rolling element made of plastic, with silicon nitride (Si₃N₄) as Ceramic material and balls have proven particularly effective as rolling elements. As Material for the plastic balls has proven to be cheap. Likewise it is advantageous to make the races from a wear-resistant and corrosion-proof protected material such as B. Cronidur 30 to make even under difficult lubrication conditions to ensure safe operation.

Zwar ist aus Patent Abstracts der JP 59-133822 (A) bekannt, zwischen die Wälzkörper (aus Stahl) Distanzwälzkörper aus Harz einzulegen. Die Verwendung bei Keramikwälzkörpern und die Verwendung bei medizinischen Geräten ist daraus aber nicht zu entnehmen.It is known from patent abstracts of JP 59-133822 (A) between the Rolling elements (made of steel) insert distance rolling elements made of resin. The Use with ceramic rolling elements and use with medical Devices cannot be seen from this.

Weiterhin ist es aus dem DE 295 03 228 U1 bekannt, bei einem Kugellager mit Käfig die Kugeln mit Kapillarlöchern zu versehen, die Öl oder Fett aufnehmen und so ein selbstschmierendes Lager ergeben. Wegen des Käfigs und der mit Schmierstoff gefüllten Kapillarlöcher wird man ein solches Lager für den oben­ genannten Anwendungsfall nicht in Betracht ziehen.Furthermore, it is known from DE 295 03 228 U1, with a ball bearing Cage the balls with capillary holes that absorb oil or fat and so result in a self-lubricating bearing. Because of the cage and with Lubricant-filled capillary holes will become such a bearing for the above Do not consider the use case mentioned.

Die Erfindung soll an einem Ausführungsbeispiel erläutert werden.The invention will be explained using an exemplary embodiment.

Fig. 1 zeigt in perspektivischer Ansicht ein vollkugeliges käfigloses Wälzla­ ger. Fig. 1 shows a perspective view of a full spherical cage-free Wälzla ger.

Fig. 2 zeigt einen Querschnitt durch eine erfindungsgemäße Wälzlagerung die in einen Turbinenzahnbohrer eingebaut ist. Fig. 2 shows a cross section through a roller bearing according to the invention which is installed in a turbine tooth drill.

In Fig. 1 ist der Innenring mit 1, der Außenring mit 2, die Wälzkörper aus Ke­ ramik mit 3 und die Wälzkörper aus Plastik mit 4 bezeichnet. Im dargestellten Beispiel ist jeweils zwischen zwei benachbarten Keramikwälzkörpern ein Wälz­ körper aus Plastik angeordnet. Es ist jedoch auch möglich, erst nach mehreren aufeinanderfolgenden Keramikkugeln eine Plastikkugel einzufügen oder bei einer ungeraden Kugelanzahl zwei Keramikkugeln sich berühren zu lassen.In Fig. 1, the inner ring with 1 , the outer ring with 2 , the rolling elements from Ke ramik with 3 and the rolling elements made of plastic with 4 . In the example shown, a plastic rolling element is arranged between two adjacent ceramic rolling elements. However, it is also possible to insert a plastic ball only after several successive ceramic balls or to have two ceramic balls touch each other if the number of balls is odd.

Wie aus Fig. 2 ersichtlich ist, ist das von Druckluft angetriebene Turbinenrad 5 über eine Welle 6 in zwei erfindungsgemäßen Wälzlagern gelagert, die über O-Ringe 7 im Gehäuse 8 des Dental-Bohrer-Handstückes abgestützt und gela­ gert sind.As can be seen from FIG. 2, the turbine wheel 5 driven by compressed air is supported by a shaft 6 in two roller bearings according to the invention, which are supported and supported by O-rings 7 in the housing 8 of the dental drill handpiece.

Claims (5)

1. Käfigloses Wälzlager, für schnellaufende medizinische Instrumente wie Zahnarztbohrer oder dergleichen, wobei mindestens die Wälzkörper aus Keramikwerkstoff bestehen, dadurch gekennzeichnet, daß zwischen den Keramikwälzkörpern (3) einzelne Wälzkörper (4) aus Plastik angeordnet sind, die mit einem Schmierstoff getränkt sind, Schmierstoff abgeben und/oder aus selbstschmierendem Werkstoff bestehen.1. Cageless roller bearing, for high-speed medical instruments such as dentist drills or the like, wherein at least the rolling elements are made of ceramic material, characterized in that individual rolling elements ( 4 ) made of plastic, which are impregnated with a lubricant, are arranged between the ceramic rolling elements ( 3 ) deliver and / or consist of self-lubricating material. 2. Käfigloses Wälzlager nach Anspruch 1, dadurch gekennzeichnet, daß jeweils zwischen zwei benachbarten Keramikkörpern (3) ein Wälzkörper (4) aus Plastik angeordnet ist.2. Cageless roller bearing according to claim 1, characterized in that a roller body ( 4 ) made of plastic is arranged between two adjacent ceramic bodies ( 3 ). 3. Käfigloses Wälzlager nach Anspruch 1, dadurch gekennzeichnet, daß die Wälzkörper (4) aus Plastik aus PTFE bestehen.3. Cageless rolling bearing according to claim 1, characterized in that the rolling bodies ( 4 ) consist of plastic made of PTFE. 4. Käfigloses Wälzlager nach Anspruch 1, dadurch gekennzeichnet, daß die Wälzkörper (3, 4) Kugeln sind.4. Cageless roller bearing according to claim 1, characterized in that the rolling elements ( 3 , 4 ) are balls. 5. Käfigloses Wälzlager nach Anspruch 1, dadurch gekennzeichnet, daß die Laufringe (1, 2) aus einem verschleißfesten und korrosionsge­ schützten Werkstoff (wie z. B. Cronidur 30) gefertigt sind.5. Cageless roller bearing according to claim 1, characterized in that the races ( 1 , 2 ) are made of a wear-resistant and corrosion-protected material (such as Cronidur 30).
DE19612571A 1996-03-29 1996-03-29 Roller bearing without cage, for fast running medical instruments Withdrawn DE19612571A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19612571A DE19612571A1 (en) 1996-03-29 1996-03-29 Roller bearing without cage, for fast running medical instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19612571A DE19612571A1 (en) 1996-03-29 1996-03-29 Roller bearing without cage, for fast running medical instruments

Publications (1)

Publication Number Publication Date
DE19612571A1 true DE19612571A1 (en) 1997-10-02

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Family Applications (1)

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DE19612571A Withdrawn DE19612571A1 (en) 1996-03-29 1996-03-29 Roller bearing without cage, for fast running medical instruments

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DE (1) DE19612571A1 (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29813086U1 (en) * 1998-05-26 1999-10-07 Kaltenbach & Voigt Drive system for dental handpieces
DE19843951A1 (en) * 1998-05-26 1999-12-02 Kaltenbach & Voigt Drive system for a dental tool holder
WO2000005636A1 (en) * 1998-07-23 2000-02-03 INA Wälzlager Schaeffler oHG Locking element for securing regulating positions
DE10259012A1 (en) * 2002-12-16 2004-07-08 Sirona Dental Systems Gmbh Dental hand instrument with moving components
US6948850B2 (en) 2002-02-01 2005-09-27 Ausman Engineering & Associates Bearing assembly
FR2868940A1 (en) 2004-04-16 2005-10-21 Sirona Dental Systems Gmbh Manual dental instrument incorporating a rotary roller with ceramic components for improved life and aptitude to sterilisation
DE102006019982A1 (en) * 2006-04-29 2007-10-31 Schaeffler Kg Ball and roller bearing rotary connection for supporting e.g. crane, has single flexible ball race formed in longitudinal section to provide elastic deformation such that roller bearing is prestressed in circumferential area
DE102007015103A1 (en) 2007-03-29 2008-10-02 Schaeffler Kg roller bearing
WO2010049227A1 (en) * 2008-10-28 2010-05-06 Schaeffler Technologies Gmbh & Co. Kg Rolling bearing, particularly wheel bearing
DE102009058811A1 (en) 2009-12-18 2011-06-22 Schaeffler Technologies GmbH & Co. KG, 91074 Cage-free rolling bearing, particularly cylinder roller bearing, has multiple metallic rolling bodies rolling between two tracks, where two neighboring rolling bodies have different surface finish at contacting surfaces
EP2481990A1 (en) 2011-02-01 2012-08-01 Laag S.r.l. Pull-out guide for an oven or a dishwasher
US9561845B2 (en) 2007-12-06 2017-02-07 Roller Bearing Company Of America, Inc. Bearing installed on an aircraft structure
US9890814B2 (en) 2014-06-03 2018-02-13 Roller Bearing Company Of America, Inc. Cage for hourglass roller bearings
US10012265B2 (en) 2007-12-06 2018-07-03 Roller Bearing Company Of America, Inc. Corrosion resistant bearing material
US10077808B2 (en) 2013-12-18 2018-09-18 Roller Bearing Company Of America, Inc. Roller profile for hourglass roller bearings in aircraft
US11493089B2 (en) * 2020-04-10 2022-11-08 Ntn Corporation Rolling bearing

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843951A1 (en) * 1998-05-26 1999-12-02 Kaltenbach & Voigt Drive system for a dental tool holder
DE19843951C2 (en) * 1998-05-26 2002-03-14 Kaltenbach & Voigt Drive system for dental handpieces
DE29813086U1 (en) * 1998-05-26 1999-10-07 Kaltenbach & Voigt Drive system for dental handpieces
WO2000005636A1 (en) * 1998-07-23 2000-02-03 INA Wälzlager Schaeffler oHG Locking element for securing regulating positions
US6948850B2 (en) 2002-02-01 2005-09-27 Ausman Engineering & Associates Bearing assembly
DE10259012A1 (en) * 2002-12-16 2004-07-08 Sirona Dental Systems Gmbh Dental hand instrument with moving components
WO2004056280A1 (en) 2002-12-16 2004-07-08 Sirona Dental Systems Gmbh Dental hand instrument comprising components which can be displaced in relation to each other
DE102004019236B4 (en) * 2004-04-16 2012-02-02 Sirona Dental Systems Gmbh Dental hand instrument with a bearing having ceramic components
FR2868940A1 (en) 2004-04-16 2005-10-21 Sirona Dental Systems Gmbh Manual dental instrument incorporating a rotary roller with ceramic components for improved life and aptitude to sterilisation
DE102004019236A1 (en) * 2004-04-16 2005-11-03 Sirona Dental Systems Gmbh Dental hand instrument with a bearing having ceramic components
DE102006019982A1 (en) * 2006-04-29 2007-10-31 Schaeffler Kg Ball and roller bearing rotary connection for supporting e.g. crane, has single flexible ball race formed in longitudinal section to provide elastic deformation such that roller bearing is prestressed in circumferential area
DE102007015103A1 (en) 2007-03-29 2008-10-02 Schaeffler Kg roller bearing
US9561845B2 (en) 2007-12-06 2017-02-07 Roller Bearing Company Of America, Inc. Bearing installed on an aircraft structure
US10012265B2 (en) 2007-12-06 2018-07-03 Roller Bearing Company Of America, Inc. Corrosion resistant bearing material
WO2010049227A1 (en) * 2008-10-28 2010-05-06 Schaeffler Technologies Gmbh & Co. Kg Rolling bearing, particularly wheel bearing
DE102009058811A1 (en) 2009-12-18 2011-06-22 Schaeffler Technologies GmbH & Co. KG, 91074 Cage-free rolling bearing, particularly cylinder roller bearing, has multiple metallic rolling bodies rolling between two tracks, where two neighboring rolling bodies have different surface finish at contacting surfaces
EP2481990A1 (en) 2011-02-01 2012-08-01 Laag S.r.l. Pull-out guide for an oven or a dishwasher
US10077808B2 (en) 2013-12-18 2018-09-18 Roller Bearing Company Of America, Inc. Roller profile for hourglass roller bearings in aircraft
US9890814B2 (en) 2014-06-03 2018-02-13 Roller Bearing Company Of America, Inc. Cage for hourglass roller bearings
US11493089B2 (en) * 2020-04-10 2022-11-08 Ntn Corporation Rolling bearing

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Owner name: FAG KUGELFISCHER GEORG SCHAEFER AG, 97421 SCHWEINFURT

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