JPH0225016Y2 - - Google Patents
Info
- Publication number
- JPH0225016Y2 JPH0225016Y2 JP1985118361U JP11836185U JPH0225016Y2 JP H0225016 Y2 JPH0225016 Y2 JP H0225016Y2 JP 1985118361 U JP1985118361 U JP 1985118361U JP 11836185 U JP11836185 U JP 11836185U JP H0225016 Y2 JPH0225016 Y2 JP H0225016Y2
- Authority
- JP
- Japan
- Prior art keywords
- seal
- seal lip
- bearing
- inclined surface
- circumferential surface
- 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.)
- Expired
Links
- 238000007789 sealing Methods 0.000 claims description 18
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 description 16
- 230000002093 peripheral effect Effects 0.000 description 8
- 239000004519 grease Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は軸受用密封部材に関するものである。[Detailed explanation of the idea] (Industrial application field) The present invention relates to a sealing member for a bearing.
（従来の技術）
従来の軸受用密封部材としては第３図に例示す
るようなものがある（実公昭54−34090）。(Prior Art) As a conventional bearing sealing member, there is one as illustrated in FIG. 3 (Japanese Utility Model Publication No. 54-34090).
すなわち、軸受１のアウターレース５内周面に
密封部材のシール本体１０が嵌着されている。シ
ール本体１０にはゴム状弾性材製シールリツプ部
２０が一体的に接着されている。 That is, the seal body 10 of the sealing member is fitted onto the inner peripheral surface of the outer race 5 of the bearing 1. A seal lip portion 20 made of a rubber-like elastic material is integrally bonded to the seal body 10.
シールリツプ２０は大気側Ｘに向つて伸びてい
る第１のシールリツプ６と軸受内部側Ｙに向つて
伸びている第２のシールリツプ１１とにより構成
されている。 The seal lip 20 is composed of a first seal lip 6 extending toward the atmosphere side X and a second seal lip 11 extending toward the inside Y of the bearing.
第１のシールリツプ１１はインナーレース３側
に面した第１の傾斜面７と第２の傾斜面８とによ
り形成されるシール端縁９を備えている。 The first sealing lip 11 has a sealing edge 9 formed by a first inclined surface 7 facing the inner race 3 side and a second inclined surface 8.
そして、第１の傾斜面７とレース周面とのなす
角度αは第２の傾斜面８とレース周面とのなす角
度βに比べ大きい。従つて、大気側Ｘからのダス
ト等の侵入を防止できるが軸受内部側Ｙからのグ
リース等の流出は防止できない。 The angle α formed between the first inclined surface 7 and the race circumferential surface is larger than the angle β formed between the second inclined surface 8 and the race circumferential surface. Therefore, although it is possible to prevent dust and the like from entering from the atmosphere side X, it is not possible to prevent grease and the like from flowing out from the inside side Y of the bearing.
一方、第２のシールリツプ１１は第１の傾斜面
１２と第２の傾斜面１３とにより形成されるシー
ル端縁１４を備えている。 On the other hand, the second sealing lip 11 has a sealing edge 14 formed by a first inclined surface 12 and a second inclined surface 13.
そして、第１の傾斜面１２とレース周面とのな
す角度αは第２の傾斜面１３とレース周面とのな
す角度βに比べ小さい。従つて軸受内部側Ｙから
のグリース等の流出は防止できるが、大気側Ｘか
らのダスト等の侵入は防止できない。 The angle α formed between the first inclined surface 12 and the race peripheral surface is smaller than the angle β formed between the second inclined surface 13 and the race peripheral surface. Therefore, although it is possible to prevent grease and the like from flowing out from the bearing inner side Y, it is not possible to prevent dust and the like from entering from the atmospheric side X.
（考案が解決しようとする問題点）
しかし、上述した従来技術においては大気側か
らのダスト等の侵入防止機能を第１のシールリツ
プ６のみに依存しているため、軸受内部へのダス
ト等の侵入を効果的に防止できない。(Problem to be solved by the invention) However, in the above-mentioned conventional technology, since the function of preventing dust from entering from the atmosphere side relies only on the first seal lip 6, dust and the like cannot enter into the inside of the bearing. cannot be effectively prevented.
また、第２のシールリツプ１１は軸受内部のグ
リースを第１のシールリツプ６側に流出させる機
能を備えていない。このため、第１のシールリツ
プ６の潤滑が損われ、早期に摩耗損傷する危険が
あつた。 Furthermore, the second seal lip 11 does not have the function of causing the grease inside the bearing to flow out to the first seal lip 6 side. As a result, the lubrication of the first seal lip 6 was impaired and there was a risk of early wear and tear.
本考案は上述した問題点を解決するためになさ
れたもので、大気側からのダストの侵入を効果的
に防止するとともに、シールリツプの耐久性を向
上させたものである。 The present invention was developed to solve the above-mentioned problems, and it effectively prevents dust from entering from the atmosphere and improves the durability of the seal lip.
（問題点を解決するための手段）
本考案は、上記した従来技術による軸受用密封
部材における問題点を考慮して、下記の構成とな
すものである。(Means for Solving the Problems) The present invention has the following configuration in consideration of the problems in the bearing sealing member according to the prior art described above.
すなわち、本考案の軸受用密封部材は、軸受の
インナーレースおよびアウターレースのいずれか
一方の周面に嵌着されるシール本体と、該シール
本体から径方向に伸びて前記インナーレースおよ
びアウターレースの他方の周面と密封摺動する弾
性材製シールリツプ部とを有し、前記シールリツ
プ部が、大気側に位置する第１のシールリツプお
よび軸受内部側に位置する第２のシールリツプを
備え、前記両シールリツプが、それぞれ、大気側
へ向いた第１の傾斜面および軸受内部側へ向いた
第２の傾斜面と、互いに対応して交差する前記第
１の傾斜面および第２の傾斜面によつて形成され
たシール端縁とを備え、前記第１の傾斜面と摺動
対象レースの周面とのなす角度が、前記第２の傾
斜面と摺動対象レースの周面とのなす角度より大
きく、前記第１のシールリツプが、環状バネ部材
を装着されるバネ装着用溝および軸方向で前記第
２のシールリツプ側へ向つて径寸法を漸増させる
傾斜面を前記シール端縁と反対側周面に形成さ
れ、前記第２のシールリツプが、前記第１の傾斜
面側に軸方向のくぼみを形成されるとともに、前
記シール端縁と反対側周面に、前記シール端縁に
比して軸方向前記軸受内部側に位置する環状バネ
部材を配置された構造を備える。 That is, the bearing sealing member of the present invention includes a seal body that is fitted onto the circumferential surface of one of the inner race and the outer race of the bearing, and a seal body that extends in the radial direction from the seal body to the inner race and the outer race. It has a seal lip portion made of an elastic material that slides sealingly against the other peripheral surface, and the seal lip portion includes a first seal lip located on the atmosphere side and a second seal lip located on the inside of the bearing, and both the seal lips are respectively formed by a first inclined surface facing the atmosphere side and a second inclined surface facing the inside of the bearing, and the first sloped surface and the second sloped surface which correspond to each other and intersect with each other. an angle between the first inclined surface and the circumferential surface of the race to be slid is larger than an angle formed by the second inclined surface and the circumferential surface of the race to be slid; The first seal lip has a spring mounting groove into which the annular spring member is mounted and an inclined surface whose diameter gradually increases in the axial direction toward the second seal lip on the circumferential surface opposite to the seal edge. and the second seal lip is formed with an axial recess on the first inclined surface side, and has an axial recess formed on the circumferential surface opposite to the seal edge. It has a structure in which an annular spring member is placed inside.
（実施例） 以下、図示の実施例について説明する。(Example) The illustrated embodiment will be described below.
第１図において、軸受１のアウターレース５の
内周面には密封部材のシール本体１０が嵌着され
ている。このシール本体１０には断面略コ字形状
の金属補強環が使用されており、この金属補強環
の径方向内端にゴム材製のシールリツプ部２０が
接着されている。このシールリツプ部２０は首部
１５より二股に分かれた大気側Ｘに位置する第１
のシールリツプ２１と軸受内部側Ｙに位置する第
２のシールリツプ２５とより構成されている。 In FIG. 1, a seal body 10 of a sealing member is fitted onto the inner circumferential surface of an outer race 5 of a bearing 1. As shown in FIG. A metal reinforcing ring having a substantially U-shaped cross section is used in this seal body 10, and a seal lip portion 20 made of a rubber material is adhered to the radially inner end of this metal reinforcing ring. This seal lip part 20 is a first part located on the atmosphere side X which is divided into two parts from the neck part 15.
The seal lip 21 is comprised of a second seal lip 25 located on the inner side Y of the bearing.
両シールリツプ２０，２５は大気側に向いて傾
斜している第１の傾斜面２２，２６と軸受内部側
に向いて傾斜している第２の傾斜面２３，２７と
が交差することにより形成されるシール端縁２
４，２８を備えている。 Both seal lips 20, 25 are formed by intersecting first inclined surfaces 22, 26 which are inclined toward the atmosphere side and second inclined surfaces 23, 27 which are inclined toward the inside of the bearing. Seal edge 2
4,28.
第１の傾斜面とインナーレース外周面とのなす
角度αは第２の傾斜面とインナーレース外周面と
のなす角度βより大きい関係にある。 The angle α between the first inclined surface and the outer circumferential surface of the inner race is larger than the angle β between the second inclined surface and the outer circumferential surface of the inner race.
また、第２のシールリツプ２５は第１の傾斜面
側に軸方向位置がシール端縁２８に達する軸方向
のくぼみ２９を設けている。 Further, the second seal lip 25 is provided with an axial recess 29 whose axial position reaches the seal edge 28 on the first inclined surface side.
更に、シール端縁２８と反対側周面に環状バネ
部材３０が配置され。、該バネ部材３０はシール
端縁２８に比べ軸方向軸受内部側にａだけ遍在さ
せている。 Further, an annular spring member 30 is disposed on the peripheral surface opposite to the seal edge 28. , the spring member 30 is ubiquitously distributed by a distance a on the inside of the bearing in the axial direction compared to the seal edge 28.
更にまた、第１のシールリツプ２１のシール端
縁２４と反対側周面には環状バネ部材１９が配置
されており、このバネ部材１９を収容しているバ
ネ装着用溝１８は第２のシールリツプ２５側へ向
つて径寸法を漸増させる傾斜面１７を備えてい
る。 Furthermore, an annular spring member 19 is disposed on the circumferential surface of the first seal lip 21 opposite to the seal edge 24, and the spring mounting groove 18 accommodating this spring member 19 is connected to the second seal lip 25. It is provided with an inclined surface 17 whose diameter gradually increases toward the side.
第２図は本考案の他の実施例を示す図であり、
第１図に示したものと相違する点はシール本体１
０から径方向外方に傾斜して伸びるダストリツプ
３２と、一端がインナーレース外周面に嵌着さ
れ、他端がダストリツプ３２の外周面の一部を覆
う形でオーバーラツプしている折曲げ部３４を有
するスリンガー３１とを設けた点である。また第
４図は本考案の更なる他の実施例を示す図であ
り、第２図の実施例と相違する点はシール本体１
０から軸方向大気側に向つて伸びるダストリツプ
３２がインナーレース側から伸びる部材３６の外
周面を一部覆う形としている点である。 FIG. 2 is a diagram showing another embodiment of the present invention,
The difference from the one shown in Fig. 1 is the seal body 1.
The dust strip 32 extends radially outward from the dust strip 32, and the folded portion 34 has one end fitted onto the outer circumferential surface of the inner race and the other end overlapping with the outer circumferential surface of the dust strip 32 so as to cover a part of the outer circumferential surface of the dust strip 32. This is because a slinger 31 is provided. Further, FIG. 4 is a diagram showing still another embodiment of the present invention, and the difference from the embodiment of FIG. 2 is that the seal body 1
The dust strip 32 extending from zero toward the atmosphere side in the axial direction partially covers the outer peripheral surface of the member 36 extending from the inner race side.
（作用）
上記した構造を備えた本考案による軸受用密封
部材においては、第２のシールリツプの大気側に
形成された第１の傾斜面の角度を、軸受内部側に
形成された第２の傾斜面の角度よりも大きく設定
されている構造が、ダスト等に対する侵入阻止機
能を強化させ、更に、第１のシールリツプの外周
側に、軸方向で第２のシールリツプ側へ向つて径
寸法を漸増させる傾斜面を形成されるとともに、
第２のシールリツプの第１の傾斜面側に、軸方向
のくぼみを形成されていることにより、第１およ
び第２のシールリツプの柔軟性が助長され、又、
第２のシールリツプの外周に配置された還状バネ
部材が、シール端縁に比して軸方向で軸受内部側
に位置していることにより、第２のシールリツプ
に対する第２の環状バネ部材の押圧力が強化され
る。(Function) In the bearing sealing member according to the present invention having the above-described structure, the angle of the first inclined surface formed on the atmosphere side of the second seal lip is changed from the angle of the second inclined surface formed on the inner side of the bearing. The structure, which is set larger than the angle of the surface, strengthens the function of preventing dust from entering, and furthermore, the diameter dimension gradually increases on the outer peripheral side of the first seal lip in the axial direction toward the second seal lip. Along with forming an inclined surface,
By forming an axial recess on the first inclined surface side of the second seal lip, flexibility of the first and second seal lips is promoted, and
The annular spring member disposed on the outer periphery of the second seal lip is located on the inside of the bearing in the axial direction compared to the seal edge, so that the second annular spring member is pressed against the second seal lip. Pressure is intensified.
（考案の効果）
第１のシールリツプも第２のシールリツプも共
に大気側の傾斜面の角度αは軸受内部側の傾斜面
の角度βに比べ大きい構成としているため、大気
側からのダストの侵入を確実に防止できる。(Effect of the invention) Both the first seal lip and the second seal lip have a configuration in which the angle α of the inclined surface on the atmosphere side is larger than the angle β of the inclined surface on the inside of the bearing, so that dust cannot enter from the atmospheric side. It can definitely be prevented.
また、第２のシールリツプ２５がくぼみ２９を
有し、径方向の変形を容易にしているため、軸受
内部のグリースが環状空所３５側へ容易に排出で
きるとともに、環状空所３５内に存在するグリー
ス、ダスト等を大気側に排出できる。 Further, since the second seal lip 25 has a recess 29 and is easily deformed in the radial direction, the grease inside the bearing can be easily discharged to the annular cavity 35 side, and the grease present in the annular cavity 35 can be easily discharged. Grease, dust, etc. can be discharged to the atmosphere.
更に、第１のシールリツプの外周側に、軸方向
で第２のシールリツプ側へ向つて径寸法を漸増さ
せる傾斜面を形成されるとともに、第２のシール
リツプの第１の傾斜面側に、軸方向のくぼみを形
成されていることにより、第１および第２のシー
ルリツプの柔軟性が助長されるので、摺動対象周
面に対する両シールリツプの追随性が確保され、
又、第２のシールリツプの外周に配置された環状
バネ部材が、シール端縁に比して軸方向で軸受内
部側に位置していることにより、第２のシールリ
ツプに対する第２の環状バネ部材の押圧力が強化
されるので、同シールリツプの密封機能が増強さ
れる。 Further, an inclined surface whose diameter gradually increases in the axial direction toward the second sealing lip is formed on the outer peripheral side of the first sealing lip, and an axially inclined surface is formed on the first inclined surface side of the second sealing lip. The formation of the recess promotes the flexibility of the first and second seal lips, ensuring the ability of both seal lips to follow the sliding surface,
Further, since the annular spring member disposed on the outer periphery of the second seal lip is located inside the bearing in the axial direction compared to the seal edge, the second annular spring member is arranged on the outer periphery of the second seal lip. Since the pressing force is strengthened, the sealing function of the sealing lip is enhanced.
また更に、第２図に示す様な態様とした場合に
はダストリツプ及びスリンガーの作用により、ダ
ストの侵入を更に確実に防止できる。 Furthermore, in the case of the embodiment shown in FIG. 2, the intrusion of dust can be more reliably prevented by the action of the dust strip and slinger.
第１図及び第２図は本考案に係る実施例を示す
断面図であり、第３図は従来技術を示す図であ
り、第４図は本考案に係る更なる他の実施例を示
す図である。
１……軸受、３……インナーレース、５……ア
ウターレース、６……第１のシールリツプ、７…
…第１の傾斜面、８……第２の傾斜面、９……シ
ール端縁、１０……シール本体、１１……第２の
シールリツプ、１２……第１の傾斜面、１３……
第２の傾斜面、１４……シール端縁、１５……首
部、１７……傾斜面、１８……バネ装着用溝、１
９……環状バネ部材、２０……シールリツプ部、
２１……第１のシールリツプ部、２２……第１の
傾斜面、２３……第２の傾斜面、２４……シール
端縁、２５……第２のシールリツプ、２６……第
１の傾斜面、２７……第２の傾斜面、２８……シ
ール端縁、２９……くぼみ、３０……環状バネ部
材、３１……スリンガー、３２……ダストリツ
ブ、３４……折曲げ部、３５……環状空所。
FIGS. 1 and 2 are cross-sectional views showing an embodiment of the present invention, FIG. 3 is a diagram showing the prior art, and FIG. 4 is a diagram showing still another embodiment of the present invention. It is. DESCRIPTION OF SYMBOLS 1... Bearing, 3... Inner race, 5... Outer race, 6... First seal lip, 7...
...First inclined surface, 8... Second inclined surface, 9... Seal edge, 10... Seal body, 11... Second seal lip, 12... First inclined surface, 13...
Second inclined surface, 14... Seal edge, 15... Neck, 17... Inclined surface, 18... Spring mounting groove, 1
9... Annular spring member, 20... Seal lip portion,
21...First seal lip portion, 22...First inclined surface, 23...Second inclined surface, 24...Seal edge, 25...Second seal lip, 26...First inclined surface , 27... second inclined surface, 28... seal edge, 29... recess, 30... annular spring member, 31... slinger, 32... dust rib, 34... bent portion, 35... annular shape Blank space.
Claims (1)
ス５のいずれか一方の周面に嵌着されるシール本
体１０と、該シール本体１０から径方向に伸びて
前記インナーレース３およびアウターレース５の
他方の周面と密封摺動する弾性材製シールリツプ
部２０とを有し、前記シールリツプ部２０が、大
気側Ｘに位置する第１のシールリツプ２１および
軸受内部側Ｙに位置する第２のシールリツプ２５
を備え、前記両シールリツプ２１，２５が、それ
ぞれ、大気側Ｘへ向いた第１の傾斜面２２，２６
および軸受内部側Ｙへ向いた第２の傾斜面２３，
２７と、互いに対応して交差する前記第１の傾斜
面２２，２６および第２の傾斜面２３，２７によ
つて形成されたシール端縁２４，２８とを備え、
前記第１の傾斜面２２，２６と摺動対象レースの
周面とのなす角度αが、前記第２の傾斜面２３，
２７と摺動対象レースの周面とのなす角度βより
大きく、前記第１のシールリツプ２１が、環状バ
ネ部材１９を装着されるバネ装着用溝１８および
軸方向で前記第２のシールリツプ２５側へ向つて
径寸法を漸増させる傾斜面１７を前記シール端縁
２４と反対側周面に形成され、前記第２のシール
リツプ２５が、前記第１の傾斜面２６側に軸方向
のくぼみ２９を形成されるとともに、前記シール
端縁２８と反対側周面に、前記シール端縁２８に
比して軸方向前記軸受内部側Ｙに位置する環状バ
ネ部材３０を配置されている軸受用密封部材。 A seal body 10 that is fitted onto the circumferential surface of one of the inner race 3 and outer race 5 of the bearing 1, and a seal body 10 that extends in the radial direction from the seal body 10 and the other circumferential surface of the inner race 3 and outer race 5. and a seal lip part 20 made of an elastic material that slides in a sealed manner, and the seal lip part 20 has a first seal lip 21 located on the atmosphere side X and a second seal lip 25 located on the inside side Y of the bearing.
, and both the seal lips 21 and 25 have first inclined surfaces 22 and 26 facing toward the atmosphere side X, respectively.
and a second inclined surface 23 facing the inner side Y of the bearing,
27, and sealing edges 24, 28 formed by the first inclined surfaces 22, 26 and the second inclined surfaces 23, 27 that intersect in correspondence with each other,
The angle α between the first inclined surfaces 22 and 26 and the circumferential surface of the sliding race is equal to the second inclined surface 23,
27 and the circumferential surface of the race to be slid, and the first seal lip 21 is directed toward the second seal lip 25 side in the spring mounting groove 18 in which the annular spring member 19 is mounted and in the axial direction. An inclined surface 17 whose diameter gradually increases toward the seal edge 24 is formed on the circumferential surface opposite to the seal edge 24, and the second seal lip 25 has an axial recess 29 formed on the first inclined surface 26 side. A sealing member for a bearing, in which an annular spring member 30 is disposed on the circumferential surface on the opposite side to the seal edge 28, and is located on the inner side Y of the bearing in the axial direction compared to the seal edge 28.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985118361U JPH0225016Y2 (en) | 1985-08-01 | 1985-08-01 | |
| US06/890,226 US4699526A (en) | 1985-08-01 | 1986-07-29 | Sealing device for bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985118361U JPH0225016Y2 (en) | 1985-08-01 | 1985-08-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6227263U JPS6227263U (en) | 1987-02-19 |
| JPH0225016Y2 true JPH0225016Y2 (en) | 1990-07-10 |
Family
ID=31004741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985118361U Expired JPH0225016Y2 (en) | 1985-08-01 | 1985-08-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0225016Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015209950A (en) * | 2014-04-30 | 2015-11-24 | Ntn株式会社 | Conical roller bearing |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0743490Y2 (en) * | 1989-03-17 | 1995-10-09 | エヌティエヌ株式会社 | Ball bearing self-aligning seal structure |
| DE10083061T1 (en) | 1999-09-10 | 2002-03-28 | Nsk Ltd | Sealed roller bearing |
| JP2012251568A (en) * | 2011-05-31 | 2012-12-20 | Mitsubishi Motors Corp | Sealing device |
| JP2013190081A (en) * | 2012-03-15 | 2013-09-26 | Jtekt Corp | Rolling bearing device |
| JP6468702B2 (en) * | 2013-11-22 | 2019-02-13 | 光洋シーリングテクノ株式会社 | Sealing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS515632U (en) * | 1974-06-28 | 1976-01-16 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6017571Y2 (en) * | 1977-01-21 | 1985-05-29 | エヌオーケー株式会社 | sealing device |
-
1985
- 1985-08-01 JP JP1985118361U patent/JPH0225016Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS515632U (en) * | 1974-06-28 | 1976-01-16 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015209950A (en) * | 2014-04-30 | 2015-11-24 | Ntn株式会社 | Conical roller bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6227263U (en) | 1987-02-19 |
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