CA1161481A - Ball bearing assembly - Google Patents
Ball bearing assemblyInfo
- Publication number
- CA1161481A CA1161481A CA000362484A CA362484A CA1161481A CA 1161481 A CA1161481 A CA 1161481A CA 000362484 A CA000362484 A CA 000362484A CA 362484 A CA362484 A CA 362484A CA 1161481 A CA1161481 A CA 1161481A
- Authority
- CA
- Canada
- Prior art keywords
- bearing assembly
- ball bearing
- retainer
- inch
- balls
- 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
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
- F16C33/38—Ball cages
- F16C33/42—Ball cages made from wire or sheet metal strips
- F16C33/422—Ball cages made from wire or sheet metal strips made from sheet metal
- F16C33/427—Ball cages made from wire or sheet metal strips made from sheet metal from two parts, e.g. ribbon cages with two corrugated annular parts
-
- 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
- F16C33/38—Ball cages
- F16C33/44—Selection of substances
- F16C33/445—Coatings
-
- 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
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
- F16C33/6607—Retaining the grease in or near the bearing
- F16C33/6614—Retaining the grease in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
-
- 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
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/60—Polyamides [PA]
- F16C2208/62—Polyamides [PA] high performance polyamides, e.g. PA12, PA46
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Paints Or Removers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
079169-MC(S) BALL BEARING ASSEMBLY
Abstract:
A ball bearing assembly comprising inner and outer races with a plurality of balls therebetween.
The balls being arranged in spaced relationship by a retainer constructed of two like parts joined together, which retainer is made of steel and preferably steel stampings and coated with a plastic material (36) preferably a nylon, such as Nylon 11.
Abstract:
A ball bearing assembly comprising inner and outer races with a plurality of balls therebetween.
The balls being arranged in spaced relationship by a retainer constructed of two like parts joined together, which retainer is made of steel and preferably steel stampings and coated with a plastic material (36) preferably a nylon, such as Nylon 11.
Description
l ~ 614~
This invention relates -to a ball bearing assembly, and more particularly to an assembly which has a ball retainer coated with a plastic material.
Ball bearing assemblies generally comprise inner and outer races with a plurality of balls therebetween, the balls being spaced apart and held in their proper operating location by a retainer. It is common practice to make the retainer of a pair of like metal stampings which are joined together. The metal can be steel or brass, as desired. Brass retainers provide superior perEormance to the steel retainers but are considerably more expensive.
Retainers can be of a land-riding variety and a non-land-riding or ball riding variety (as it is called), the land-riding variety having portions which contact the inner or outer race of the bearing which provides a reduction in vibration and shock effects when used in such load applications. One disadvantage oE the land-riding retainers is the friction developed at the interface of the outer race. To reduce this friction, land-riding retainers have been fabricated from brass stampings instead of steel stampings, at least in high quality bearing assemblies. The cost of such brass retainers is much greater than steel retainers.
The present invention resides in a ball bearing assembly having an inner race and an outer race with flanking lands and a plurality of balls between and contacting the races, the balls being spaced by a land riding ball retainer having spaced pockets for receiving the balls, annular walls ~!
sb/;`~
1161~1 riding on the lands, and recesses for retaining lubricant for the bearing, the retainer being constructed of-a pair of like, generally circular steel parts joined together.
A coating of plast'ic material is provided on the retainer having a thickness in the range of 0.0025 inch to 0.050 inch and a coefficien-t of friction less than 0.4 and a Shore D
hardness of 70 to 71, the coating permitting operation of the bearing under marginal lubrication conditions.
The plastic material may be a thermoplastic nylon known as "Nylon 11". One manufacturer of Nylon 11 is the Rilsan Corporation, Glen Rock, New Jersey. In the assembly, the retainer retains the advantages of brass retainers while providing increased life under marginal lubricating conditions at a significantly reduced cost. It has been demonstrated that the nylon coated steel retainers will continue to operate with little or no wear for considerable periods of time after the original lubrication supply has deteriorated.
The plastic can be applied to the steel stampings as a powder and is cured by being heated to an elevated temperature.
One way of carrying out the invention is described in detail below with reference to drawings which illustrate only one specific embodiment, in which:-FIG. 1 is a partial sectional view through a typical ball bearing assembly with a land-riding retainer;
FIG. 2 is a perspective view of a retainer part according to this invention; and FIG. 3 is a sectional view through the retainer of FIG. 2.
sb/
1 3 6~4Bl Looking a-t the drawing and especially FIG. 1, there is illustrated a ball bearing assembly 10 which comprises inner and outer race members 12 and 14, respectively, with a plurality of balls 16 therebetween.
The balls 16 are retained and spaced in the assembly by means of a land-riding retainer 18 constructed of like parts 20 riveted together by rivets 22.
The retainer 18 is illustrated in more detail in FIGS. 2 and 3 to which attention is invited. The retainer 18 is constructed of two like parts 20 joined by rivets 22 through openings 24. The parts are usually made by stamping the parts from sheet metal. As illustrated each part 20 is an annulus having spaced curved walls 26 which, when assembled, define pockets 28, each to receive a ball 16. Between the curved walls are other pockets 30 defined by the rivet wall 32 and an overlying wall 34, the latter riding on the outer race 14 of the bearing assembly 10. The pockets 30 function to retain lubricant; most bearing assemblies as described are initially factory lubricated. The parts 20 are coated, as at 36, with a thermoplastic polyamide for example "Nylon 11", one manufacturer being the Rilsan Corporation, Glen Rock, New Jersey 07~52. The coating is applied as a powder either in an electrostetic process or a fluid bed process and with a thickness of 0.0025 inch to 0.050 inch and preferably 0.0025 inch to 0.008 inch and is fused at a temperature in the range of 400 to 450F. Data for the "Nylon 11" coating is found in an undated and uncopyrighted brochure published by Rilsan Corporation, as follows:
sb/
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This invention relates -to a ball bearing assembly, and more particularly to an assembly which has a ball retainer coated with a plastic material.
Ball bearing assemblies generally comprise inner and outer races with a plurality of balls therebetween, the balls being spaced apart and held in their proper operating location by a retainer. It is common practice to make the retainer of a pair of like metal stampings which are joined together. The metal can be steel or brass, as desired. Brass retainers provide superior perEormance to the steel retainers but are considerably more expensive.
Retainers can be of a land-riding variety and a non-land-riding or ball riding variety (as it is called), the land-riding variety having portions which contact the inner or outer race of the bearing which provides a reduction in vibration and shock effects when used in such load applications. One disadvantage oE the land-riding retainers is the friction developed at the interface of the outer race. To reduce this friction, land-riding retainers have been fabricated from brass stampings instead of steel stampings, at least in high quality bearing assemblies. The cost of such brass retainers is much greater than steel retainers.
The present invention resides in a ball bearing assembly having an inner race and an outer race with flanking lands and a plurality of balls between and contacting the races, the balls being spaced by a land riding ball retainer having spaced pockets for receiving the balls, annular walls ~!
sb/;`~
1161~1 riding on the lands, and recesses for retaining lubricant for the bearing, the retainer being constructed of-a pair of like, generally circular steel parts joined together.
A coating of plast'ic material is provided on the retainer having a thickness in the range of 0.0025 inch to 0.050 inch and a coefficien-t of friction less than 0.4 and a Shore D
hardness of 70 to 71, the coating permitting operation of the bearing under marginal lubrication conditions.
The plastic material may be a thermoplastic nylon known as "Nylon 11". One manufacturer of Nylon 11 is the Rilsan Corporation, Glen Rock, New Jersey. In the assembly, the retainer retains the advantages of brass retainers while providing increased life under marginal lubricating conditions at a significantly reduced cost. It has been demonstrated that the nylon coated steel retainers will continue to operate with little or no wear for considerable periods of time after the original lubrication supply has deteriorated.
The plastic can be applied to the steel stampings as a powder and is cured by being heated to an elevated temperature.
One way of carrying out the invention is described in detail below with reference to drawings which illustrate only one specific embodiment, in which:-FIG. 1 is a partial sectional view through a typical ball bearing assembly with a land-riding retainer;
FIG. 2 is a perspective view of a retainer part according to this invention; and FIG. 3 is a sectional view through the retainer of FIG. 2.
sb/
1 3 6~4Bl Looking a-t the drawing and especially FIG. 1, there is illustrated a ball bearing assembly 10 which comprises inner and outer race members 12 and 14, respectively, with a plurality of balls 16 therebetween.
The balls 16 are retained and spaced in the assembly by means of a land-riding retainer 18 constructed of like parts 20 riveted together by rivets 22.
The retainer 18 is illustrated in more detail in FIGS. 2 and 3 to which attention is invited. The retainer 18 is constructed of two like parts 20 joined by rivets 22 through openings 24. The parts are usually made by stamping the parts from sheet metal. As illustrated each part 20 is an annulus having spaced curved walls 26 which, when assembled, define pockets 28, each to receive a ball 16. Between the curved walls are other pockets 30 defined by the rivet wall 32 and an overlying wall 34, the latter riding on the outer race 14 of the bearing assembly 10. The pockets 30 function to retain lubricant; most bearing assemblies as described are initially factory lubricated. The parts 20 are coated, as at 36, with a thermoplastic polyamide for example "Nylon 11", one manufacturer being the Rilsan Corporation, Glen Rock, New Jersey 07~52. The coating is applied as a powder either in an electrostetic process or a fluid bed process and with a thickness of 0.0025 inch to 0.050 inch and preferably 0.0025 inch to 0.008 inch and is fused at a temperature in the range of 400 to 450F. Data for the "Nylon 11" coating is found in an undated and uncopyrighted brochure published by Rilsan Corporation, as follows:
sb/
~ 1 61~
079169-MC(S) ~ 4 -:~ ~ X ~ r~ ~'D ~ . c O w ~. ~ 3 w t,3 ~s ~, ~ I ~ _~0' j~, :1 0 ~ C~ ~ ~ ~ ~
. u~ ~ _~ 1_~- o ~ O ~ ~
: O o ~ _ ~ _ O tD ~ P N ~3 (1~ 0 4: 'C o O , O
o1 O ~0 O ~ la~ 33 ~ z l_ ~0-~ . ôo ~:
. . - ; . ~-~ ~ ~y o lJ ~- w ~ ~
_ ~D w CI~ 'O c2: 3 3 o o ~0 I ~ n .
3 3 ~: ~:1 o~ ~ ~.~
l ~I )- ~_ l x 1_ 15 ~ 3 O w 1l ~9 X X ~n 4 ~3 l ~ w l ;~
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c 3 ~ ~ . 3 D~ O r~ ~h ~ ~
(D O Pl ~ P~ . C O ' ~ I'' O
o n rt 1- ~h . o ~
~_ _ ~ -- o Y n ~n 3 i~- Y- o ~ 3 W
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:
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r~ o o ~ ~- . 3 ~ ,_, Ut ~ ~ O -t ~D ~ ~ ~ Y ~ ~t ..... U~ 3 ~ ~ o o o o o o ~ ; ~ I' ~
~ Y O O O ~ G~ ~,. . y ~ ~
CO ~ W CO O ~ ~,. U) ~ ~3 ~3 ' O ~r ~ O ~-~, ~ ~c ~ at ~ 7~ ~ ~to ~ ~ o ~ ~ u~ ~l ~ ~ x . . . . . ~ ~ ~
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tn o t~ O i' fD G 0 3 0 0 0 ~ ~ O ~ O
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Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a ball bearing assembly having an inner race and an outer race with flanking lands and a plurality of balls between and contacting said races, the balls being spaced by a land riding ball retainer having spaced pockets for receiving said balls, annular walls riding on said lands, and recesses for retaining lubricant for the bearing, said retainer being constructed of a pair of like, generally circular steel parts joined together; the improvement comprising:
a coating of a plastic material on said retainer having a thickness in the range of 0.0025 inch to 0.050 inch and a coefficient of friction less than 0.4 and a Shore D
hardness of 70 to 71, said coating permitting operation of said bearing under marginal lubrication conditions.
a coating of a plastic material on said retainer having a thickness in the range of 0.0025 inch to 0.050 inch and a coefficient of friction less than 0.4 and a Shore D
hardness of 70 to 71, said coating permitting operation of said bearing under marginal lubrication conditions.
2. In a ball bearing assembly as recited in Claim 1, in which said plastic material has a thickness in the range of 0.0025 inch to 0.008 inch.
3. In a ball bearing assembly as recited in Claim 2 in which said plastic material is a thermoplastic.
4. In a ball bearing assembly as recited in Claim 3 in which said thermoplastic material is a fixed nylon powder.
5. In a ball bearing assembly as recited in Claim 4 in which said nylon is Nylon 11.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US9239179A | 1979-11-08 | 1979-11-08 | |
| US092,391 | 1979-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1161481A true CA1161481A (en) | 1984-01-31 |
Family
ID=22232983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000362484A Expired CA1161481A (en) | 1979-11-08 | 1980-10-16 | Ball bearing assembly |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5683617A (en) |
| BR (1) | BR8007181A (en) |
| CA (1) | CA1161481A (en) |
| DE (1) | DE3041355A1 (en) |
| FR (1) | FR2469608A1 (en) |
| GB (1) | GB2062128B (en) |
| IT (2) | IT1134189B (en) |
| MX (1) | MX155574A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8801389A (en) * | 1988-05-31 | 1989-12-18 | Skf Ind Trading & Dev | ROLLER BEARING. |
| US4902145A (en) * | 1989-06-12 | 1990-02-20 | Emerson Electric Co. | Ball separator for bearing assembly |
| DE19912730A1 (en) * | 1999-03-20 | 2000-09-21 | Volkswagen Ag | Axial sliding constant velocity joint |
| DE102012101649A1 (en) * | 2012-02-29 | 2013-08-29 | Thyssenkrupp Rothe Erde Gmbh | Method for producing a roller bearing cage, in particular for slewing bearings, and device for carrying out the method |
| DE102012101651A1 (en) | 2012-02-29 | 2013-08-29 | Thyssenkrupp Rothe Erde Gmbh | Method for producing a roller bearing cage for an axial-radial roller bearing and axial-radial roller bearing |
| CN107335591A (en) * | 2017-05-25 | 2017-11-10 | 山东金帝精密机械科技股份有限公司 | Bearing cage workmanship of spraying plastics and equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2712481A (en) * | 1953-02-24 | 1955-07-05 | Gen Motors Corp | Separator for antifriction bearings |
| GB826091A (en) * | 1956-12-21 | 1959-12-23 | Skf Svenska Kullagerfab Ab | Improvements in or relating to rolling bearings |
| GB883132A (en) * | 1957-10-22 | 1961-11-22 | Schaeffler Wilhelm | Improvements in or relating to cages for bearing needles |
| FR1204966A (en) * | 1957-11-11 | 1960-01-29 | Robert Kling Wetzlar G M B H | Plastic cages for bearings |
| CH485959A (en) * | 1968-04-23 | 1970-02-15 | Riv Officine Di Villar Perosa | Ball bearing cage |
| GB1515643A (en) * | 1977-02-24 | 1978-06-28 | Ferranti Ltd | Bearings |
-
1980
- 1980-10-16 CA CA000362484A patent/CA1161481A/en not_active Expired
- 1980-10-16 GB GB8033406A patent/GB2062128B/en not_active Expired
- 1980-10-24 JP JP14843280A patent/JPS5683617A/en active Pending
- 1980-11-03 DE DE19803041355 patent/DE3041355A1/en not_active Ceased
- 1980-11-05 IT IT25791/80A patent/IT1134189B/en active
- 1980-11-05 BR BR8007181A patent/BR8007181A/en unknown
- 1980-11-05 IT IT8023286U patent/IT8023286V0/en unknown
- 1980-11-07 FR FR8023916A patent/FR2469608A1/en active Granted
- 1980-11-07 MX MX184679A patent/MX155574A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BR8007181A (en) | 1981-05-12 |
| IT1134189B (en) | 1986-07-31 |
| MX155574A (en) | 1988-03-29 |
| GB2062128A (en) | 1981-05-20 |
| JPS5683617A (en) | 1981-07-08 |
| DE3041355A1 (en) | 1981-05-21 |
| GB2062128B (en) | 1983-10-26 |
| IT8025791A0 (en) | 1980-11-05 |
| FR2469608B1 (en) | 1983-12-16 |
| FR2469608A1 (en) | 1981-05-22 |
| IT8023286V0 (en) | 1980-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |