JP3539770B2 - Roller for self-aligning roller bearing and its processing method - Google Patents

Roller for self-aligning roller bearing and its processing method Download PDF

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Publication number
JP3539770B2
JP3539770B2 JP20646494A JP20646494A JP3539770B2 JP 3539770 B2 JP3539770 B2 JP 3539770B2 JP 20646494 A JP20646494 A JP 20646494A JP 20646494 A JP20646494 A JP 20646494A JP 3539770 B2 JP3539770 B2 JP 3539770B2
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Prior art keywords
grinding
roller
outer diameter
section
radius
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JPH0874858A (en
Inventor
彰 筒井
公弘 花井
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NTN Corp
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NTN Corp
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Priority to JP20646494A priority Critical patent/JP3539770B2/en
Priority to US08/520,438 priority patent/US5752775A/en
Priority to DE19531965.6A priority patent/DE19531965C9/en
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Description

【０００１】
【産業上の利用分野】
本発明は、自動調心ころ軸受に組み込まれるころ及びその加工方法に関する。
【０００２】
【従来の技術】
ころ軸受の一例として、図３に、自動調心ころ軸受を示す。この自動調心ころ軸受は、内輪２に一体に設けられた中つば２ａによってころ３’を接触案内する形式のもので、球面軌道の外輪１、複列軌道の内輪２、内・外輪１、２間に介在する複数のたる形のころ３’、ころ３’を円周等間隔に保持する保持器４で構成される。
【０００３】
内・外輪１、２間に組み込まれるころ３’は、図４に拡大して示すように、軸受中心側の端面が大径（大端面３’ｂ）、軸受端部側の端面が小径（小端面３’ｃ）であり、そのため、ころ３’は軌道から軸受中心側に向かう力を受け、大端面３’ｂを、内輪２の中つば２ａによって接触案内されながら転動する。ころ３’の外径面３’ａは外輪１の軌道面に対応した曲率を有する球面、大端面３’ｂは外径面３’ａよりも大きな曲率を有する球面、小端面３’ｃはストレート面である。
【０００４】
大端面３’ｂを球面とするのは、中つば２’ａとの接触による滑り摩擦を軽減する等の理由からである。また、外径面３’ａと大端面３’ｂとの境界、外径面３’ａと小端面３’ｃとの境界は、エッジロードを防止する等の理由から、面取アール部Ｒｂ’、Ｒｃ’が施されている。尚、同図には、大端面３’ｂと小端面３’ｃとの径差を実際よりも誇張して示してある。
【０００５】
従来、上記のようなころ３’を加工する場合、面取アール部Ｒｂ’を旋削にて成形し、外径面３’ａおよび大端面３’ｂを研削にて成形した後、図５に拡大して示す外径面３’ａと面取アール部Ｒｂ’との境界部分Ｅ１、及び、大端面３’ｂと面取アール部Ｒｂ’との境界部分Ｅ２をタンブラーにて成形する方法が採られていた。
【０００６】
【発明が解決しようとする課題】
従来の加工方法によれば、図６に拡大して示すように、境界部分Ｅ１、Ｅ２にエッジ（Ｅ１ａ、Ｅ１ｂ、Ｅ２ａ、Ｅ２ｂ）が残り、ころ３’の組み込みの際、境界部分Ｅ１のエッジ（Ｅ１ａ、Ｅ１ｂ）によって外輪１の軌道面にきずをつけるおそれがあった。また、軸受の回転時、境界部分Ｅ２のエッジ（Ｅ２ａ、Ｅ２ｂ）によって中つば２ａとの接触部における油膜が切れ易くなる心配もあった。さらに、従来の加工方法によれば、外径面３’ａの研削と大端面３’ｂの研削とを別工程で行なう必要があり、しかも、研削完了後にタンブラー加工を行なうため、加工工程が複雑化し、工程管理面から改善の余地があった。
【０００７】
そこで、本発明は、上記のような問題点を解消し、自動調心ころ軸受の品質向上、加工工程の簡略化を図ることをその目的とする。
【０００８】
【課題を解決するための手段】
本発明の自動調心ころ軸受用ころは、外径面と端面との境界に面取アール部を有する自動調心ころ軸受用ころにおいて、外径面と面取アール部とをころの最大径に対して０．０１〜０．０４の曲率半径を有する第１アール部で滑らかに連続させ、かつ、端面と面取アール部とをころの最大径に対して０．０１〜０．０４の曲率半径を有する第２アール部で滑らかに連続させたものである。請求項２の発明は、上記の自動調心ころ軸受用ころの加工方法に関するもので、ころの外径面を研削する外径研削部と、ころの端面を研削する端面研削部と、ころの面取アール部を研削する面取研削部と、外径研削部と面取研削部とをころの第１アール部に対応した曲率で滑らかに連続させる第１アール研削部と、端面研削部と面取研削部とをころの第２アール部に対応した曲率で滑らかに連続させる第２アール研削部とを有する研削砥石を用いて、ころの外径面、端面、面取りアール部を同時研削するものである。
【０００９】
請求項３の発明は、上記の自動調心ころ軸受用ころの加工方法に使用する研削砥石に関するので、ころの外径面を研削する外径研削部と、ころの端面を研削する端面研削部と、ころの面取アール部を研削する面取研削部と、外径研削部と面取研削部とをころの第１アール部に対応した曲率で滑らかに連続させる第１アール研削部と、端面研削部と面取研削部とをころの第２アール部に対応した曲率で滑らかに連続させる第２アール研削部とを有するものである。
【００１０】
【作用】
本発明の自動調心ころ軸受用ころは、外径面と面取アール部とが第１アール部を介して滑らかに連続し、端面と面取アール部とが第２アール部を介して滑らかに連続した形状をなし、面取アール部との境界部分にエッジが残存していない。
【００１１】
外径研削部、端面研削部、面取研削部、第１アール研削部、第２アール研削部を有する研削砥石を用いて、ころの外径面、端面、面取りアール部を同時研削することにより、上記形状のころを精度良く加工することができる（従来のタンブラー加工によれば、面取アール部との境界部分を高精度に仕上げることは困難である。）。また、外径面の研削と大端面の研削とを同一工程で行なうことができ、しかも、研削完了後のタンブラー加工が不要になるため、加工工程を簡略化することができる。
【００１２】
【実施例】
以下、本発明の実施例について説明する。
【００１３】
図１に示すころ３は、図３に示すような自動調心ころ軸受に組み込まれるものである。ころ３の外径面３ａは図３に示す外輪１の軌道面に対応した曲率を有する球面、大端面３ｂは外径面３ａよりも大きな曲率を有する球面、小端面３ｃはストレート面である。外径面３ａと大端面３ｂとの境界、および、外径面３ａと小端面３ｃとの境界には、それぞれ、面取アール部Ｒｂ、Ｒｃが施されている。図１ｂに拡大して示すように、外径面３ａと大端面３ｂ側の面取アール部Ｒｂとは第１アール部Ｒ１を介して滑らかに連続し、大端面３ｂと面取アール部Ｒｂとは第２アール部Ｒ２を介して滑らかに連続している。第１アール部Ｒ１の曲率半径、第２アール部Ｒ２の曲率半径は、いずれも、ころ３の最大径をＲｏとして、０．０１Ｒｏ〜０．０４Ｒｏ程度である。
【００１４】
図２は、上記のようなころ３を加工するための研削砥石５を示す。この研削砥石５は、ころ３の外径面３ａを研削する外径研削部５ａと、大端面３ｂを研削する大端面研削部５ｂと、面取アール部Ｒｂを研削する面取研削部５Ｒｂと、外径研削部５ａと面取研削部５Ｒｂとを第１アール部Ｒ１に対応した曲率で滑らかに連続させる第１アール研削部５Ｒ１と、大端面研削部５ｂと面取研削部５Ｒｂとを第２アール部Ｒ２に対応した曲率で滑らかに連続させる第２アール研削部５Ｒ２とを備えている。外径研削部５ａの軸方向長さはころ３の外径面３ａの軸方向長さと同程度かそれよりも大きく、大端面研削部５ｂの半径方向長さはころ３の大端面３ｂの半径と同程度かそれよりも大きい。
【００１５】
上記のような研削砥石５を用いて、前工程の旋削等により所定形状に成形されてきたころ３の外径面３ａ、大端面３ｂ、面取アール部Ｒｂを同時研削する。従来の加工方法に比べ、加工工程を大幅に簡略化することができる同時に、面取アール部Ｒｂとの境界部分にエッジが残存しない。研削完了後、外径面３ａ、大端面３ｂを超仕上にて仕上げる。
【発明の効果】
【００１６】
以上説明したように、本発明の自動調心ころ軸受用ころは、外径面と面取アール部とが第１アール部を介して滑らかに連続し、端面と面取アール部とが第２アール部を介して滑らかに連続した形状をなし、従来の自動調心ころ軸受用ころのように、面取アール部との境界部分にエッジが残存しないので、エッジによる、ころ組み込み時の軌道面損傷、軸受の回転時の油膜切れの心配が解消され、自動調心ころ軸受の品質向上を図ることができる。
【００１８】
また、外径研削部、端面研削部、面取研削部、第１アール研削部、第２アール研削部を有する研削砥石を用いて、ころの外径面、端面、面取りアール部を同時研削することにより、上記形状のころを精度良く加工することができる。さらに、外径面の研削と大端面の研削とを同一工程で行なうことができ、しかも、研削完了後のタンブラー加工が不要になるため、加工工程を大幅に簡略化することができる。
【図面の簡単な説明】
【図１】本発明の実施例に係る自動調心ころ軸受用ころの側面図（図ａ）、図ａにおける大端面側の面取アール部周辺を示す拡大側面図（図ｂ）である。
【図２】本発明の実施例に係る研削砥石の断面図（図ａ）、図ａにおける面取研削部周辺を示す拡大断面図（図ｂ）である。
【図３】自動調心ころ軸受の断面図である。
【図４】従来の自動調心ころ軸受用ころの側面図である。
【図５】図４における大端面側の面取アール部周辺を示す拡大側面図である。
【図６】図５における面取アール部との境界部分を示す拡大側面図である。
【符号の説明】
３ ころ
３ａ 外径面
３ｂ 大端面
Ｒｂ 面取アール部
Ｒ１ 第１アール部
Ｒ２ 第２アール部
５ 研削砥石
５ａ 外径研削部
５ｂ 大端面研削部
５Ｒｂ 面取研削部
５Ｒ１ 第１アール研削部
５Ｒ２ 第２アール研削部[0001]
[Industrial applications]
The present invention relates to a roller incorporated in a self-aligning roller bearing and a method of processing the same.
[0002]
[Prior art]
FIG. 3 shows a self-aligning roller bearing as an example of the roller bearing. This self-aligning roller bearing is of a type in which a roller 3 ′ is contact-guided by a middle collar 2 a provided integrally with an inner ring 2, and includes an outer ring 1 of a spherical track, an inner ring 2 of a double row track, an inner / outer ring 1, It comprises a plurality of barrel-shaped rollers 3 'interposed between the two, and a cage 4 for holding the rollers 3' at equal circumferential intervals.
[0003]
As shown in the enlarged view of FIG. 4, the roller 3 'assembled between the inner and outer rings 1 and 2 has a large diameter (large end surface 3'b) on the center side of the bearing and a small diameter (large end surface 3'b) on the side of the bearing end. The rollers 3 'receive a force from the raceway toward the center of the bearing, and roll on the large end surface 3'b while being contacted and guided by the inner flange 2a of the inner ring 2. The outer diameter surface 3'a of the roller 3 'is a spherical surface having a curvature corresponding to the raceway surface of the outer ring 1, the large end surface 3'b is a spherical surface having a larger curvature than the outer diameter surface 3'a, and the small end surface 3'c is It is a straight surface.
[0004]
The reason why the large end face 3′b is spherical is that sliding friction due to contact with the middle brim 2′a is reduced. Further, the boundary between the outer diameter surface 3′a and the large end surface 3′b and the boundary between the outer diameter surface 3′a and the small end surface 3′c are chamfered round portions Rb for reasons such as preventing edge load. ', Rc' are given. Note that the diameter difference between the large end face 3'b and the small end face 3'c is exaggerated in the drawing.
[0005]
Conventionally, when processing the above-mentioned roller 3 ', after forming the chamfered round portion Rb' by turning, and forming the outer diameter surface 3'a and the large end surface 3'b by grinding, FIG. A method of forming a boundary portion E1 between the outer diameter surface 3′a and the chamfered radius portion Rb ′ and a boundary portion E2 between the large end surface 3′b and the chamfered radius portion Rb ′ using a tumbler. Had been taken.
[0006]
[Problems to be solved by the invention]
According to the conventional processing method, the edges (E1a, E1b, E2a, E2b) remain at the boundary portions E1 and E2 as shown in an enlarged view in FIG. 6, and the edges of the boundary portion E1 when the rollers 3 'are assembled. (E1a, E1b) may cause flaws on the raceway surface of the outer race 1 . Further, when the bearing rotates, there is a concern that the oil film at the contact portion with the inner brim 2a is easily cut by the edges (E2a, E2b) of the boundary portion E2. Further, according to the conventional processing method, it is necessary to perform the grinding of the outer diameter surface 3′a and the grinding of the large end surface 3′b in separate steps. It became complicated and there was room for improvement in terms of process management.
[0007]
Therefore, an object of the present invention is to solve the above-mentioned problems, improve the quality of the spherical roller bearing, and simplify the machining process.
[0008]
[Means for Solving the Problems]
The roller for a self-aligning roller bearing of the present invention is a roller for a self-aligning roller bearing having a chamfered round portion at a boundary between an outer diameter surface and an end surface. , The first round portion having a radius of curvature of 0.01 to 0.04 is smoothly continuous, and the end face and the chamfered round portion are 0.01 to 0.04 with respect to the maximum diameter of the roller. The second round portion having a radius of curvature is smoothly continuous. The invention of claim 2 relates to a method for processing the roller for a self-aligning roller bearing described above, and includes an outer diameter grinding unit for grinding an outer diameter surface of the roller, an end surface grinding unit for grinding an end surface of the roller, and a roller. A chamfering grinding section for grinding a chamfering round section, a first round grinding section for smoothly connecting the outer diameter grinding section and the chamfering grinding section with a curvature corresponding to the first round section of the roller, and an end face grinding section. Using a grinding wheel having a chamfered grinding portion and a second radius grinding portion for smoothly continuing the curvature with a curvature corresponding to the second radius portion of the roller, simultaneously grind the outer diameter surface, the end surface, and the chamfered radius portion of the roller. Things.
[0009]
The invention according to claim 3 relates to a grinding wheel used in the above-described method for processing a roller for a self-aligning roller bearing, so that an outer diameter grinding section for grinding the outer diameter surface of the roller and an end face grinding section for grinding the end face of the roller. And a chamfered grinding portion for grinding the chamfered round portion of the roller, a first radius grinding portion for smoothly connecting the outer diameter grinding portion and the chamfered grinding portion with a curvature corresponding to the first radius portion of the roller, It has a second radius grinding portion for smoothly connecting the end face grinding portion and the chamfer grinding portion with a curvature corresponding to the second radius portion of the roller.
[0010]
[Action]
In the roller for a self-aligning roller bearing according to the present invention, the outer diameter surface and the chamfered round portion are smoothly continuous via the first rounded portion, and the end face and the chamfered rounded portion are smooth via the second rounded portion. And no edge remains at the boundary with the chamfered round portion.
[0011]
By simultaneously grinding the outer diameter surface, the end surface, and the chamfering radius of the roller using a grinding wheel having an outer radius grinding unit, an end surface grinding unit, a chamfering grinding unit, a first radius grinding unit, and a second radius grinding unit. In addition, the rollers having the above-mentioned shape can be processed with high accuracy (according to the conventional tumbler processing, it is difficult to finish the boundary portion with the chamfered round portion with high accuracy). Further, the grinding of the outer diameter surface and the grinding of the large end surface can be performed in the same step, and the tumbling after the completion of the grinding is not required, so that the processing step can be simplified.
[0012]
【Example】
Hereinafter, examples of the present invention will be described.
[0013]
The roller 3 shown in FIG. 1 is incorporated in a self-aligning roller bearing as shown in FIG. The outer diameter surface 3a of the roller 3 is a spherical surface having a curvature corresponding to the raceway surface of the outer race 1 shown in FIG. 3, the large end surface 3b is a spherical surface having a larger curvature than the outer diameter surface 3a, and the small end surface 3c is a straight surface. The boundary between the outer diameter surface 3a and the large end surface 3b and the boundary between the outer diameter surface 3a and the small end surface 3c are provided with chamfer R portions Rc, respectively. As shown enlarged in FIG. 1b, the outer diameter surface 3a and the chamfered round portion Rb on the side of the large end surface 3b smoothly continue through the first round portion R1, and the large end surface 3b and the chamfered round portion Rb are connected to each other. Are smoothly continuous via the second round portion R2. Each of the radius of curvature of the first radius portion R1 and the radius of curvature of the second radius portion R2 is about 0.01 Ro to 0.04 Ro, with the maximum diameter of the roller 3 being Ro.
[0014]
FIG. 2 shows a grinding wheel 5 for processing the roller 3 as described above. The grinding wheel 5 includes an outer diameter grinding portion 5a for grinding the outer diameter surface 3a of the roller 3, a large end surface grinding portion 5b for grinding the large end surface 3b, and a chamfering grinding portion 5Rb for grinding the chamfered round portion Rb. A first radius grinding section 5R1 for smoothly connecting the outer diameter grinding section 5a and the chamfer grinding section 5Rb with a curvature corresponding to the first radius section R1, and a large end face grinding section 5b and a chamfer grinding section 5Rb. And a second radius grinding portion 5R2 that smoothly continues with a curvature corresponding to the 2R portion R2. The axial length of the outer diameter grinding portion 5a is equal to or greater than the axial length of the outer diameter surface 3a of the roller 3, and the radial length of the large end surface grinding portion 5b is the radius of the large end surface 3b of the roller 3. About the same or larger.
[0015]
Using the grinding wheel 5 as described above, the outer diameter surface 3a, the large end surface 3b, and the chamfered round portion Rb of the roller 3 formed into a predetermined shape by turning or the like in the previous process are simultaneously ground. Compared to the conventional processing method, the processing steps can be greatly simplified, and at the same time, no edge remains at the boundary with the chamfered round portion Rb. After the grinding is completed, the outer diameter surface 3a and the large end surface 3b are finished by super finishing.
【The invention's effect】
[0016]
As described above, in the roller for a self-aligning roller bearing according to the present invention, the outer diameter surface and the chamfered round portion smoothly continue through the first round portion, and the end surface and the chamfered round portion correspond to the second round portion. It has a shape that is smoothly continuous through the radius, and there is no edge remaining at the boundary with the chamfered radius as in conventional rollers for spherical roller bearings. This eliminates the risk of damage and oil film shortage during rotation of the bearing, and improves the quality of the spherical roller bearing.
[0018]
In addition, using a grinding wheel having an outer diameter grinding unit, an end surface grinding unit, a chamfering grinding unit, a first radius grinding unit, and a second radius grinding unit, simultaneously grinding the outer diameter surface, the end surface, and the chamfering radius unit of the rollers. Thereby, the rollers having the above-mentioned shape can be processed with high accuracy. Further, the grinding of the outer diameter surface and the grinding of the large end surface can be performed in the same process, and the tumbling process after the completion of the grinding is not required, so that the working process can be greatly simplified.
[Brief description of the drawings]
Figure 1 is a side view of a self-aligning roller roller bearing according to an embodiment of the present invention (FIG. A), is an enlarged side view showing a chamfered round portion near the large end face side in FIG. A (Figure b).
2 is a cross-sectional view of the grinding wheel according to an embodiment of the present invention (FIG. A), is an enlarged sectional view showing the periphery chamfer grinding portion in FIG. A (Figure b).
FIG. 3 is a sectional view of a self-aligning roller bearing.
FIG. 4 is a side view of a conventional roller for a self-aligning roller bearing.
5 is an enlarged side view showing the periphery of a chamfered round portion on the large end face side in FIG. 4;
FIG. 6 is an enlarged side view showing a boundary portion with a chamfered round portion in FIG. 5;
[Explanation of symbols]
3 Roller 3a Outer diameter surface 3b Large end surface Rb Chamfering round portion R1 First round portion R2 Second round portion 5 Grinding wheel 5a Outside diameter grinding portion 5b Large end surface grinding portion 5Rb Chamfering grinding portion 5R1 First round grinding portion 5R2 2R grinding unit

Claims (3)

外径面と端面との境界に面取アール部を有する自動調心ころ軸受用ころにおいて、外径面と面取アール部とをころの最大径に対して０．０１〜０．０４の曲率半径を有する第１アール部で滑らかに連続させ、かつ、端面と面取アール部とをころの最大径に対して０．０１〜０．０４の曲率半径を有する第２アール部で滑らかに連続させたことを特徴とする自動調心ころ軸受用ころ。In time for the self-aligning roller bearing having a boundary chamfered round portion of the outer surface and the end surface, the curvature of 0.01 to 0.04 of the outer diameter surface and the chamfered round portion with respect to the maximum diameter of the roller The first radius portion having a radius is smoothly continuous, and the end surface and the chamfered radius portion are smoothly continuous at a second radius portion having a radius of curvature of 0.01 to 0.04 with respect to the maximum diameter of the rollers. A roller for a self-aligning roller bearing, characterized in that: 請求項１に記載の自動調心ころ軸受用ころを加工する方法であって、ころの外径面を研削する外径研削部と、ころの端面を研削する端面研削部と、ころの面取アール部を研削する面取研削部と、外径研削部と面取研削部とをころの第１アール部に対応した曲率で滑らかに連続させる第１アール研削部と、端面研削部と面取研削部とをころの第２アール部に対応した曲率で滑らかに連続させる第２アール研削部とを有する研削砥石を用いて、ころの外径面、端面、面取りアール部を同時研削することを特徴とする自動調心ころ軸受用ころの加工方法。2. A method for processing a roller for a self-aligning roller bearing according to claim 1 , wherein the outer diameter grinding section grinds an outer diameter surface of the roller, an end face grinding section grinds an end face of the roller, and a chamfer of the roller. A chamfer grinding section for grinding a round section, a first round grinding section for smoothly connecting the outer diameter grinding section and the chamfer grinding section with a curvature corresponding to the first round section of the roller, an end face grinding section and a chamfer. Using a grinding wheel having a second radius grinding portion that smoothly and continuously connects the grinding portion with the curvature corresponding to the second radius portion of the roller, simultaneously grinding the outer diameter surface, the end surface, and the chamfer radius portion of the roller. spherical roller machining method of roller bearings, characterized. 請求項２に記載の自動調心ころ軸受用ころの加工方法に使用する研削砥石であって、ころの外径面を研削する外径研削部と、ころの端面を研削する端面研削部と、ころの面取アール部を研削する面取研削部と、外径研削部と面取研削部とをころの第１アール部に対応した曲率で滑らかに連続させる第１アール研削部と、端面研削部と面取研削部とをころの第２アール部に対応した曲率で滑らかに連続させる第２アール研削部とを有することを特徴とする研削砥石。A grinding wheel used in the method for processing a roller for a self-aligning roller bearing according to claim 2 , wherein an outer diameter grinding unit for grinding an outer diameter surface of the roller, and an end surface grinding unit for grinding an end surface of the roller, A chamfered grinding portion for grinding the chamfered round portion of the roller, a first rounded grinding portion for smoothly connecting the outer diameter grinding portion and the chamfered grinding portion with a curvature corresponding to the first rounded portion of the roller, and an end face grinding A grinding wheel, comprising: a second round grinding section for smoothly and continuously connecting a section and a chamfer grinding section with a curvature corresponding to a second round section of the roller.
JP20646494A 1994-08-31 1994-08-31 Roller for self-aligning roller bearing and its processing method Expired - Fee Related JP3539770B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP20646494A JP3539770B2 (en) 1994-08-31 1994-08-31 Roller for self-aligning roller bearing and its processing method
US08/520,438 US5752775A (en) 1994-08-31 1995-08-29 Roller bearing
DE19531965.6A DE19531965C9 (en) 1994-08-31 1995-08-30 Rolling bearings, in particular roller bearings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20646494A JP3539770B2 (en) 1994-08-31 1994-08-31 Roller for self-aligning roller bearing and its processing method

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JPH0874858A JPH0874858A (en) 1996-03-19
JP3539770B2 true JP3539770B2 (en) 2004-07-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010001706A1 (en) 2008-07-01 2010-01-07 Ntn株式会社 Bearing roller, bearing, and bearing roller processing method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005297181A (en) 2004-03-16 2005-10-27 Nsk Ltd Device and method for machining end face of workpiece and roller bearing
JP2008057571A (en) * 2006-08-29 2008-03-13 Ntn Corp Roller for rolling bearing and rolling bearing
JP2014202329A (en) * 2013-04-09 2014-10-27 Ntn株式会社 External surface griding method of bearing roller and roller bearing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010001706A1 (en) 2008-07-01 2010-01-07 Ntn株式会社 Bearing roller, bearing, and bearing roller processing method

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