JPS63140120A - Rolling bearing - Google Patents
Rolling bearingInfo
- Publication number
- JPS63140120A JPS63140120A JP61286999A JP28699986A JPS63140120A JP S63140120 A JPS63140120 A JP S63140120A JP 61286999 A JP61286999 A JP 61286999A JP 28699986 A JP28699986 A JP 28699986A JP S63140120 A JPS63140120 A JP S63140120A
- Authority
- JP
- Japan
- Prior art keywords
- rolling element
- plating layer
- sialon
- silicon nitride
- raceway surfaces
- 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.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 35
- 238000007747 plating Methods 0.000 claims abstract description 42
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 11
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000004519 grease Substances 0.000 claims abstract description 8
- 229910001105 martensitic stainless steel Inorganic materials 0.000 claims description 7
- OFNHPGDEEMZPFG-UHFFFAOYSA-N phosphanylidynenickel Chemical compound [P].[Ni] OFNHPGDEEMZPFG-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 16
- 230000007797 corrosion Effects 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 6
- 229920001296 polysiloxane Polymers 0.000 abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 229910000734 martensite Inorganic materials 0.000 abstract description 2
- 239000010935 stainless steel Substances 0.000 abstract 2
- 238000007789 sealing Methods 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 229910052759 nickel Inorganic materials 0.000 description 9
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 6
- 239000004327 boric acid Substances 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910000531 Co alloy Inorganic materials 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 206010011224 Cough Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7846—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with a gap between the annular disc and the inner race
- F16C33/785—Bearing shields made of sheet metal
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Of Bearings (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は核燃料移送装置などホウ酸水、又は水中で使
用され耐食性を要求されるころがり軸受に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a rolling bearing that is used in boric acid water or water, such as in nuclear fuel transfer equipment, and is required to have corrosion resistance.
従来の技術とその問題点
耐食性を要求される場合のころがり軸受材料として、５
ＵＳ４４００などのマルテンサイト系ステンレス鋼、セ
ラミックス、オーステナイト系ステンレス鋼、コバルト
合金、ニッケル合金などが使用されているが、耐食性お
よび負荷能力が高くしかも安価であるという要件を同時
に満たすものはない。Conventional technology and its problems As a rolling bearing material when corrosion resistance is required, 5
Martensitic stainless steels such as US 4400, ceramics, austenitic stainless steels, cobalt alloys, nickel alloys, etc. have been used, but there is no material that simultaneously satisfies the requirements of high corrosion resistance and load capacity, and low cost.
すなわち、マルテンサイト系ステンレス鋼と窒化ケイ素
、サイアロンなどのセラミックス以外は負荷能力が比較
的小さく、重荷重用には適さない。とくに、オーステナ
イト系ステンレス鋼は硬さが低く、ころがり軸受には適
さない。That is, materials other than martensitic stainless steel and ceramics such as silicon nitride and sialon have relatively low load capacities and are not suitable for heavy loads. In particular, austenitic stainless steel has low hardness and is not suitable for rolling bearings.
セラミックス、コバルト合金およびニッケル合金は高価
である。マルテンサイト系ステンレス鋼は安価で負荷能
力が高く、ＳＵＪ ２などの高炭素クロム軸受鋼などよ
り錆びにくいものの、水中では赤錆びを発生する。また
、軌道輪と転動体の両方に金属材料を使用する場合は、
接触面で金属接触による移着が生じ易く、また金属性の
軌道輪および転動体の表面にニッケルなどのめっきを施
しても、転動体と軌道面の接触部では高い接触圧力によ
りめっき層がはがれ易く、ころがり寿命の点で問題があ
る。また、咳燃料移送装置などホウ酸水中に軸受が浸漬
して使用される場合、単にニッケルめっきだけを施した
場合表面が黒変しやすいという問題があった。Ceramics, cobalt alloys and nickel alloys are expensive. Martensitic stainless steel is inexpensive, has a high load capacity, and is less prone to rust than high-carbon chromium bearing steels such as SUJ 2, but it does develop red rust in water. In addition, when using metal materials for both the raceway and rolling elements,
Transfer due to metal contact is likely to occur on the contact surfaces, and even if the surfaces of the metal raceway rings and rolling elements are plated with nickel, etc., the plating layer may peel off due to the high contact pressure at the contact areas between the rolling elements and the raceway surfaces. This causes problems in terms of rolling life. Furthermore, when a bearing is used by being immersed in boric acid water, such as in a cough fuel transfer device, there is a problem in that the surface tends to turn black if only nickel plating is applied.
この発明の目的は、上記の問題を解決し、耐食性および
負荷能力が高く、しかも安易なころがり軸受を提供する
ことにある。An object of the present invention is to solve the above problems and provide a rolling bearing that has high corrosion resistance and load capacity, and is easy to use.
問題点を解決するための手段
この発明によるころがり軸受は、内輪および外輪がマル
テンサイト系ステンレス鋼、転動体が窒化ケイ素又はサ
イアロンよりなり、内輪および外輪の軌道面を除く部分
の表面に無電解ニッケル・リンめっき層が形成され、内
輪と外輪の間にシリコングリースが封入されてシールド
板により密封されているものである。Means for Solving the Problems The rolling bearing according to the present invention has an inner ring and an outer ring made of martensitic stainless steel, a rolling element made of silicon nitride or sialon, and electroless nickel on the surface of the inner ring and outer ring except for the raceway surface. - A phosphor plating layer is formed, silicone grease is sealed between the inner ring and outer ring, and the seal is sealed with a shield plate.
作 用
内輪および外輪は無電解ニッケル・リンめっき層により
保護されて表面の黒変が防止され、めっき層のない軌道
面はシリコングリースとシールド板により保護される。The inner and outer rings are protected by an electroless nickel-phosphorus plating layer to prevent blackening of the surface, and the raceway surface without the plating layer is protected by silicone grease and a shield plate.
また、軌道面にはめっき層が形成されていないので、転
動体との接触によりめっき層がはがれるようなことがな
い。そして、転動体が窒化ケイ素、又はサイアロンより
なるので、転動体の耐食性も高く、しかも転動体と軌道
面の移着を少なくすることができる。Furthermore, since no plating layer is formed on the raceway surface, there is no possibility that the plating layer will peel off due to contact with the rolling elements. Since the rolling elements are made of silicon nitride or sialon, the corrosion resistance of the rolling elements is high, and migration between the rolling elements and the raceway surface can be reduced.
実 施 例
図面は、この発明を単列深みぞ玉軸受に適用した実施例
を示す。Embodiment The drawings show an embodiment in which the present invention is applied to a single-row deep groove ball bearing.
この軸受は、内輪（１０）、外輪（１１）、転動体（１
２）、保持器（１３）および両端のシールド板（１４）
より構成されており、内輪（１０）と外輪（１１）の間
には水中、特にホウ酸水中での使用に適したシリコング
リースが封入されている。This bearing consists of an inner ring (10), an outer ring (11), and a rolling element (1
2), retainer (13) and shield plates at both ends (14)
Silicone grease suitable for use in water, particularly boric acid water, is sealed between the inner ring (10) and outer ring (11).
内輪（１０）および外輪（１１）は５ＵＳ４４０Ｃなど
のマルテンサイト系ステンレス鋼よりなり、これらの軌
道面（ｌｏａ） ＜１ｌａ）を除く部分の表面に無電解
ニッケル・リンめっき層（１５）（１Ｂ）が形成されて
いる。このめっき層（１５）（１Ｂ）は用途により異な
る厚さとするが、通常は５〜３０切程度の厚さを有する
。The inner ring (10) and outer ring (11) are made of martensitic stainless steel such as 5US440C, and have an electroless nickel-phosphorus plating layer (15) (1B) on the surface of the parts except for the raceway surface (LOA) <1LA). is formed. The thickness of this plating layer (15) (1B) varies depending on the application, but it usually has a thickness of about 5 to 30 pieces.
転動体（１２）は窒化ケイ素又はサイアロンよりなり、
保持器（１３）はたとえばオーステナイト系ステンレス
鋼などの耐食材料よりなる。耐荷重性の点からころがり
軸受用セラミックスには、窒化ケイ素、サイアロンが望
ましい。The rolling element (12) is made of silicon nitride or sialon,
The cage (13) is made of a corrosion-resistant material such as austenitic stainless steel. From the viewpoint of load resistance, silicon nitride and Sialon are preferred as ceramics for rolling bearings.
シールド板（１４）は水中でも腐食されにくい耐食材料
で構成され、核燃料移送装置などのような放射線環境下
で使用されることより、主としてオーステナイト系ステ
ンレス鋼などが用いられる。The shield plate (14) is made of a corrosion-resistant material that is not easily corroded even in water, and is mainly made of austenitic stainless steel because it is used in a radiation environment such as a nuclear fuel transfer device.
シールド板（１４）は、外輪（１１）の両端部に形成さ
れたシールみぞ（１７）にはめ込まれている。そして、
シールド板（１４）先端と内輪（１０）はラビリンスを
形成し、非接触を保っている。The shield plate (14) is fitted into seal grooves (17) formed at both ends of the outer ring (11). and,
The tip of the shield plate (14) and the inner ring (10) form a labyrinth and maintain non-contact.
外輪（１１）のめっき層（１６）およびめっき層のない
軌道面（ｌｌａ）は、たとえば次のようにして形成され
る。まず、軌道みぞおよびシールみぞ（１７）を形成し
た外輪（１１）の全表面に、無電解めっき（化学めっき
）により、めっき層（１６）を形成する。次に、軌道み
ぞの部分のめっき層を研磨などによって除去し、めっき
層を除去した軌道みぞの部分に超仕上げを施すことによ
り、滑らかな軌道面（ｌｌａ）を形成する。内輪（１０
）についても、同様である。この他の方法としては、は
じめに内外輪（１０）（１１）の軌道みぞおよびシール
みぞ（１７）など各部を加工し、さらに軌道１１（ＬＯ
ａ）（ｌｌａ）を超仕上げしたあと、軌道面（１０ａ）
（ｌ ｌａ）のみにマスキングを施して他の部分にめ
っき層（ｔ５）（１ｅ）を形成する方法力計ある。The plating layer (16) of the outer ring (11) and the raceway surface (lla) without the plating layer are formed, for example, as follows. First, a plating layer (16) is formed by electroless plating (chemical plating) on the entire surface of the outer ring (11) on which the raceway groove and seal groove (17) are formed. Next, the plating layer on the raceway groove portion is removed by polishing or the like, and the portion of the raceway groove from which the plating layer has been removed is superfinished to form a smooth raceway surface (lla). Inner circle (10
) is also the same. Another method is to first process the raceway grooves and seal grooves (17) of the inner and outer rings (10) and (11), and then process the raceway 11 (LO
a) After super finishing (lla), raceway surface (10a)
There is a method of applying masking to only (l la) and forming plating layers (t5) and (1e) on other parts.
無電解ニッケル争リンめっき層は適度に硬さを存し、耐
食性および密着性が高く、ピンホールも少ない。このた
め、軸受が水中など耐食雰囲気下におかれても、内輪（
１０）および外輪（１１）の表面のめっき層（１５）
（１Ｂ）により腐食が防止される。特に、無電解ニッケ
ル寺リンめっき層のリン含有量を１３〜１５％にすれば
水中やホウ酸水中の黒変が極小化される。また、内輪（
１０）および外輪（１１）の軌道面（ｌｏａ） （ｌ
ｌａ）にはめっき層が形成されていないので、転動体（
１２）との接触によりめっき層がはがれることがなく、
しかも転動体（１２）が窒化ケイ素、サイアロンなどの
セラミックスよりなるので、軌道面（１０ａ） （ｌｌ
ａ）との移着を少なくすることができる。そして、めっ
き層のない軌道面（ｌｅａ）（ｌｌａ）は超仕上げによ
り滑らかにされているので、結びに＜＜、シかもシリコ
ングリースとシールド板（１４）により保護されている
ため、水中、特にホウ酸水中などで使用されても錆びが
発生しない。The electroless nickel-phosphorus plating layer has moderate hardness, high corrosion resistance and adhesion, and few pinholes. Therefore, even if the bearing is placed in a corrosion-resistant atmosphere such as underwater, the inner ring (
10) and a plating layer (15) on the surface of the outer ring (11)
(1B) prevents corrosion. In particular, if the phosphorus content of the electroless nickel phosphorus plating layer is set to 13 to 15%, black discoloration in water or boric acid solution can be minimized. Also, the inner circle (
10) and the raceway surface (LOA) of the outer ring (11) (l
Since no plating layer is formed on la), the rolling element (
12) The plating layer will not peel off due to contact with
Moreover, since the rolling elements (12) are made of ceramics such as silicon nitride and sialon, the raceway surface (10a) (ll
Transfer with a) can be reduced. The raceway surface (lea) (lla) without a plating layer is smoothed by super-finishing, so it is protected by silicone grease and shield plate (14), making it difficult to connect, especially underwater. Rust does not occur even when used in boric acid water.
なお、無電解ニッケルめっき層には、硬質クロムめっき
層などにみられるようなピンホールが比較的少ない。ま
た、素地の表面に凹凸がある場合、硬質クロムめっきな
どでは厚さの均一なめっき層が得られないが、無電解ニ
ッケルめっきでは素地の形状にかかわらず厚さの均一な
めっき層が得られる。さらに、無電解ニッケルめっき層
は、硬質クロムめっき層などに比べて素地との密着性が
高い。このため、無電解ニッケルめっきを施すことによ
り、耐食性の非常に高いめっき層が得られる。Note that the electroless nickel plating layer has relatively few pinholes, such as those found in hard chromium plating layers. In addition, if the surface of the substrate is uneven, hard chrome plating etc. cannot provide a plating layer with a uniform thickness, but electroless nickel plating can provide a plating layer with a uniform thickness regardless of the shape of the substrate. . Furthermore, the electroless nickel plating layer has higher adhesion to the substrate than a hard chromium plating layer. Therefore, by applying electroless nickel plating, a plated layer with extremely high corrosion resistance can be obtained.
この発明は単列深みぞ玉軸受以外のラジアルころがり軸
受にもスラストころがり軸受にも適用できる。This invention can be applied to radial rolling bearings and thrust rolling bearings other than single-row deep groove ball bearings.
発明の効果
この発明によるころがり軸受は、上述の構成を有するの
で、耐食性および負荷能力が高く、しかも安価であると
いう効果を奏する。すなわち、内輪および外輪がマルテ
ンサイト系ステンレス鋼よりなり、これらの表面に無電
解ニッケル・リンめっき層が形成されているだけである
から、負荷能力が高く、安価であり、無電解ニッケル中
リンめっき層により腐食を防止することができる。めっ
き層の黒変も極小化できる。Effects of the Invention Since the rolling bearing according to the present invention has the above-mentioned configuration, it has the advantage of having high corrosion resistance and load capacity, and being inexpensive. In other words, the inner ring and outer ring are made of martensitic stainless steel, and only an electroless nickel/phosphorus plating layer is formed on their surfaces, so they have high load capacity, are inexpensive, and are made of martensitic stainless steel. The layer can prevent corrosion. Black discoloration of the plating layer can also be minimized.
また、内輪および外輪の軌道面にはめっき層が形成され
ていないので、転動体との接触によりめっき層がはがれ
るようなことがなく、しかも転動体が窒化ケイ素又はサ
イアロンよりなるので、軌道面との移着を少なくするこ
とができる。In addition, since no plating layer is formed on the raceway surfaces of the inner ring and outer ring, the plating layer will not peel off due to contact with the rolling elements, and since the rolling elements are made of silicon nitride or sialon, the raceway surfaces and transfer can be reduced.
そして、めっき層のない軌道面はシリコングリースとシ
ールド板により保護されるため、特にホウ酸水中などで
も腐食の恐れがない。Since the raceway surface without a plating layer is protected by silicone grease and a shield plate, there is no risk of corrosion, especially in boric acid water.
図面は、この発明の実施例を示すころがり軸受の要部縦
断面図である。
（１０）・・・内輪、（ｌｌ）・・・外輪、（１０ａ）
（ｌｌａ）−・・軌道面、（■２）・・・転動体、（１
４）・・・シールド板、（１５）（１６）・・・無電解
ニッケル・リンめっき層。
以上
特許出願人 三菱重工業株式会社
同 光洋精工株式会社The drawing is a longitudinal sectional view of a main part of a rolling bearing showing an embodiment of the present invention. (10)...Inner ring, (ll)...Outer ring, (10a)
(lla) - raceway surface, (■2)... rolling element, (1
4)... Shield plate, (15) (16)... Electroless nickel/phosphorus plating layer. Patent applicants: Mitsubishi Heavy Industries, Ltd. Koyo Seiko Co., Ltd.
Claims (1)
体が窒化ケイ素又はサイアロンよりなり、内輪および外
輪の軌道面を除く部分の表面に無電解ニッケル・リンめ
っき層が形成され、内輪と外輪の間にシリコングリース
が封入されてシールド板により密封されているころがり
軸受。The inner and outer rings are made of martensitic stainless steel, the rolling elements are made of silicon nitride or sialon, and an electroless nickel-phosphorus plating layer is formed on the surfaces of the inner and outer rings except for the raceway surfaces, and silicon is used between the inner and outer rings. A rolling bearing that is filled with grease and sealed with a shield plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61286999A JPH0788855B2 (en) | 1986-12-01 | 1986-12-01 | Rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61286999A JPH0788855B2 (en) | 1986-12-01 | 1986-12-01 | Rolling bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63140120A true JPS63140120A (en) | 1988-06-11 |
| JPH0788855B2 JPH0788855B2 (en) | 1995-09-27 |
Family
ID=17711710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61286999A Expired - Fee Related JPH0788855B2 (en) | 1986-12-01 | 1986-12-01 | Rolling bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0788855B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0384420U (en) * | 1989-12-20 | 1991-08-27 | ||
| NL1019860C2 (en) * | 2002-01-30 | 2003-08-05 | Skf Ab | Roller bearing with a ceramic rolling element and steel inner or outer ring. |
| JP2005326021A (en) * | 2005-06-17 | 2005-11-24 | Nsk Ltd | Anticorrosion rolling bearing |
| WO2012152453A1 (en) * | 2011-05-09 | 2012-11-15 | Schaeffler Technologies AG & Co. KG | Method for improving corrosion protection in rolling bearings and rolling bearings produced according to said method |
-
1986
- 1986-12-01 JP JP61286999A patent/JPH0788855B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0384420U (en) * | 1989-12-20 | 1991-08-27 | ||
| NL1019860C2 (en) * | 2002-01-30 | 2003-08-05 | Skf Ab | Roller bearing with a ceramic rolling element and steel inner or outer ring. |
| WO2003064874A1 (en) * | 2002-01-30 | 2003-08-07 | Ab Skf | Rolling bearing having ceramic rolling element and steel inner or outer ring |
| JP2005326021A (en) * | 2005-06-17 | 2005-11-24 | Nsk Ltd | Anticorrosion rolling bearing |
| WO2012152453A1 (en) * | 2011-05-09 | 2012-11-15 | Schaeffler Technologies AG & Co. KG | Method for improving corrosion protection in rolling bearings and rolling bearings produced according to said method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0788855B2 (en) | 1995-09-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |