Technical Information
Series Code Type of Bearing
10 Self-alining Ball Bearing
12 Self-alining Ball Bearing
13 Self-alining Ball Bearing
14 Self-alining Ball Bearing
22 Self-alining Ball Bearing
23 Self-alining Ball Bearing
32 Angular Contact Ball Bearing
33 Angular Contact Ball Bearing
52 Angular Contact Ball Bearing
53 Angular Contact Ball Bearing
42 Deep Groove Ball Bearing Double Row
43 Deep Groove Ball Bearing Double Row
60 Deep Groove Ball Bearing, Single Row
62 Deep Groove Ball Bearing, Single Row
63 Deep Groove Ball Bearing, Single Row
64 Deep Groove Ball Bearing, Single Row
160 Deep Groove Ball Bearing, Single Row
161 Deep Groove Ball Bearing, Single Row
618 Deep Groove Ball Bearing, Single Row
622 Deep Groove Ball Bearing, Single Row
623 Deep Groove Ball Bearing, Single Row
72 Angular Contact Ball Bearing, Single Row
73 Angular Contact Ball Bearing, Single Row
112-113 Self-alining Ball Bearing with Extended Inner Ring
202-203 Barrel Roller Bearing
204
213-222 Spherical Roller Bearing
223,230 Spherical Roller Bearing
231,232 Spherical Roller Bearing
233,239 Spherical Roller Bearing
240,241 Spherical Roller Bearing
292,293 Spherical Roller Thrust Bearing
294
302,303 Tapered Roller Bearing
313,320 Tapered Roller Bearing
322,323 Tapered Roller Bearing
330,331 Tapered Roller Bearing
332 Tapered Roller Bearing
511,512 Thrust Ball Bearing, Single Direction
513,514 Thrust Ball Bearing, Single Direction
522,523 Thrust Ball Bearing, Double Direction
524 Thrust Ball Bearing, Double Direction
N....2 Cylindrical Roller Bearing
N....3 Cylindrical Roller Bearing
N...42 Cylindrical Roller Bearing
N...10 Cylindrical Roller Bearing
N...22 Cylindrical Roller Bearing
N...23 Cylindrical Roller Bearing
811,812 Cylindrical Roller Thrust Bearing
2344,2347 Angular Contact Thrust Bearing
Double Direction
7602,7603 Angular Contact Thrust Ball Bearing
Single Direction
Bore Code Bore Diameter(mm)
3 3mm
/4 4mm
4 4mm
5 5mm
/5 5mm
6 6mm
/6 6mm
7 7mm
/7 7mm
8 8mm
/8 8mm
9 9mm
/9 9mm
00 10mm
01 12mm
02 15mm
03 17mm
/22 22mm
/28 28mm
/32 32mm
/500 500mm
04 04X8=20mm
05 05X5=25mm
06 06X5=30mm
07 07X5=35mm
08 08x5=40mm
09 09X5=45mm
10 10X5=50mm
96 96X5=480mm
Tuesday, August 26, 2008
Saturday, August 16, 2008
Materials For Rolleing Contact Bearings
A rolling contact bearing consists of one or more rings and rolling elements (which directly support hte loads) and, usually , a cage which keeps the rolling elememts at equal intercals. Both rolling and sliding movents occur between these parts.
1. Bearings Ring And Rolling Elements
because of high, repetitive stress to the rolling contact areas, fatigue phenomenon will occur to the beraings maririal after a duration of operatuin. Loading stress ultimately dislodges a surface section and the beraing fails. To delay the advent of material fatigue, bearing ring and rolling element marieials should have the following properties:
o High Level of hardness
o High Rolling cintact fatigue resistance
o Good wear resistance
o Dimensional Stability
o Good Mechanical Strength
Standard beraing material for bearing rings and rolling elements is vacuum-degassed, high-carbon, chroame beraing steel.
For application requiring a higher degree of reliability, bearing steel using a vacuum-melting process or electroslaf solution (ESR)
In additon to the aobve, high-speed steel may be used for bearing for applications requiring tolerance to high temperatures.
A rolling contact bearing consists of one or more rings and rolling elements (which directly support hte loads) and, usually , a cage which keeps the rolling elememts at equal intercals. Both rolling and sliding movents occur between these parts.
1. Bearings Ring And Rolling Elements
because of high, repetitive stress to the rolling contact areas, fatigue phenomenon will occur to the beraings maririal after a duration of operatuin. Loading stress ultimately dislodges a surface section and the beraing fails. To delay the advent of material fatigue, bearing ring and rolling element marieials should have the following properties:
o High Level of hardness
o High Rolling cintact fatigue resistance
o Good wear resistance
o Dimensional Stability
o Good Mechanical Strength
Standard beraing material for bearing rings and rolling elements is vacuum-degassed, high-carbon, chroame beraing steel.
For application requiring a higher degree of reliability, bearing steel using a vacuum-melting process or electroslaf solution (ESR)
In additon to the aobve, high-speed steel may be used for bearing for applications requiring tolerance to high temperatures.
Tuesday, August 5, 2008
Home.
1. Type and Features of Rolling Contact Bearings
1.1 Classification and Types of Rolling Contact BearingsIn general, rolling contact bearings may be classified as radial or thrust bearings according to bearing design or they may be classified as ball or roller bearing according to the type for rolling element.
Radial bearings are mainly designed for supporting a load perpendicular to a shaft axis
Whereas thrust bearings accept loads parallel to the shaft axis..
Using the ball or roller classification roller bearings may be further divided according to the shape of the roller into the sub-classes; cylindrical roller, Tapered roller, Spherical roller, or Needle roller bearings. Ball bearings can be further divided according to the number of rows into either single-row or double row (for thrust ball bearings, single direction and double direction) Ball bearings may be still further sub-divided into small segments according to the relationship between the bearing rings and rolling elements; the shape of bearings rings; and use of accessories.
Bearings are also classified by specific application, such as wheel bearings for automotive application.
1.2 Rolling Contact Bearings Designs and FeaturesRolling contact bearings usually consist of an inner ring, outer ring, and rolling elements (ball or rollers), and a cage which positions the rolling elements at fixed intervals between the ring raceway.
Standard materials for inner and outer rings, and for the rolling elements, are high carbon chromium bearings steel or case hardening steel. The steel is heat-treated to an appropriate hardness to attain optimum resistance to rolling fatigue. Bearings surfaces are ground to a very high accuracy using special machine tools.
While each of the carious types of rolling contact bearings has special features, the following features are common to most rolling contact bearings type.
Rolling contact bearings have relatively low starting resistance. There is little difference between the starting and running resistance of rolling contact bearings.
Dimensions and accuracy are standardized ready-made products of high quality are easy to obtain.
Compared to ‘’sliding’’ bearings, rolling contact bearings are less prone to wear and help to maintain the accuracy of the machine in which they are used.
Rolling contact bearings consume small amounts of lubricant and far less costly to maintain than sliding-type bearings.
To get optimum performance from a selected bearing, it is necessary to understand the design and features of the various bearings types and to then select bearings optimal to individual machine performance.
1.2.1 Deep Grove Ball BearingsDeep grove ball bearings are the most popular of all the ball bearings types because they are available in a wide variety of seals, shield and snap-ring arrangements.
The bearings ring grooves are circular arcs made slightly larger than the radius of the ball. The balls make point contact with the raceways (elliptical contact when loaded). The inner ring shoulders are of equal height (as the outer ring shoulders).
Deep groove ball bearings can sustain radial, axial, or composite loads and because of simple design, this bearings type can be produced to provide both high-running accuracy and high-speed operation.
Deep groove ball bearings having an outside diameter less then 9mm are known as miniature ball bearings. Deep groove ball bearings having an outside diameter > 9mm and a bore diameter < 10 mm are known as extra-small ball bearings.
Standard ball retainers (cages) are made from pressed steel. Machined cages are used in press steel. Machined cages are used in bearings operating at very high speeds or for large diameter bearings.
Deep groove ball bearings with seals or shields are standardized. They contain paper amount of grease in advance.
1.2.2 Single-row Angular Contact Ball BearingThe raceways of both the inner and outer rings of this bearing type are made with a set contact angle. These bearings are non-separable since the balls are inserted utilizing counter-bore construction, a larger number of balls can be installed than in the case of deep groove ball bearings.
Standard café materials may be pressed steel, high-strength brass, or synthetic resin. Cage material is dependent on the bearing series and or service condition.
Single-row angular contact ball bearings can sustain radial, axial or composite loads. However, any axial load must be in one direction.
This bearing type is generally used in pairs to handle the induced load resulting from the internal axial force generated by the applied radial load. When mounting tow single bearings in adjacent position, all bearings manufacturing brands are provides these combination parts (pairs) with readjusted clearance. Paired combination bearings are matched sets. Combination or paired bearings can be arranged BACK-TOBACK, FACE-TO-FACE, or TANDEM sets can sustain bidirectional axial loads.
1.2.3 Double-row Angular Contact Ball Bearings.The construction of this ball bearing type is similar to the adjacent, BACK-TO-BACK mounting of two single-row angular contact ball bearings. Because fewer balls can be inserted per row compared to single-row angular contact ball bearings, a double-row angular contact ball bearing will have less load capacity then an equivalent size/series BACK-TO-BACK set of two single-row angular contact ball bearings.
The type bearings can sustain radial, moment and bi-direction axial loads.
1.2.4 Self-aligning Ball BearingsThis type is constructed with the inner ring and ball assembly contained within an outer ring which has a spherical raceway. Due to the construction, this bearing type will tolerate a small angular misalignment from deflection or mounting error. Self-aligning ball bearing suitable for long shafts where accurate positioning of housing bore is difficult. This type is often used in conjunction with pillow blocks. Cages are made from pressed steel or polyamide resin.
This bearing should only be used in light axial load application due to the small axial support of the elements by outer ring raceway.
1.2.5 Cylindrical Roller Bearings.Constriction of this roller bearing type is the simplest of all radial roller bearings.
This bearing type is often used in high-speed applications. Because the inner rings, outer rings, rollers are in line contact; this bearings type has a large radial load capacity. Various cylindrical
roller bearing configurations:
N,NJ,NF,NU,RNU: integral ribs (flanges)
NH, NP, NUP, NUH: integral and loose ribs
NN, NNU: double-row bearings
Configuration having integral flags or loose ribs on both the inner and outer rings can sustain a small amount of axial load. Since this bearings type supports axial loads as sliding action between the end of the rollers and flange faces, axial loading limited
Double-row cylindrical roller bearings are used for high-speed, high-accuracy applications such as; main spindle support for lathes, milling machines, and machining centers. Radial clearance of tapered-bore bearings can be adjusted during mounting of the bearing(s) onto the mating shaft.
Standard cages are pressed steel or polyamide resin. Machined cage of high-strength brass are used for bearings of large dimension or for high-speed application.
1.1 Classification and Types of Rolling Contact BearingsIn general, rolling contact bearings may be classified as radial or thrust bearings according to bearing design or they may be classified as ball or roller bearing according to the type for rolling element.
Radial bearings are mainly designed for supporting a load perpendicular to a shaft axis
Whereas thrust bearings accept loads parallel to the shaft axis..
Using the ball or roller classification roller bearings may be further divided according to the shape of the roller into the sub-classes; cylindrical roller, Tapered roller, Spherical roller, or Needle roller bearings. Ball bearings can be further divided according to the number of rows into either single-row or double row (for thrust ball bearings, single direction and double direction) Ball bearings may be still further sub-divided into small segments according to the relationship between the bearing rings and rolling elements; the shape of bearings rings; and use of accessories.
Bearings are also classified by specific application, such as wheel bearings for automotive application.
1.2 Rolling Contact Bearings Designs and FeaturesRolling contact bearings usually consist of an inner ring, outer ring, and rolling elements (ball or rollers), and a cage which positions the rolling elements at fixed intervals between the ring raceway.
Standard materials for inner and outer rings, and for the rolling elements, are high carbon chromium bearings steel or case hardening steel. The steel is heat-treated to an appropriate hardness to attain optimum resistance to rolling fatigue. Bearings surfaces are ground to a very high accuracy using special machine tools.
While each of the carious types of rolling contact bearings has special features, the following features are common to most rolling contact bearings type.
Rolling contact bearings have relatively low starting resistance. There is little difference between the starting and running resistance of rolling contact bearings.
Dimensions and accuracy are standardized ready-made products of high quality are easy to obtain.
Compared to ‘’sliding’’ bearings, rolling contact bearings are less prone to wear and help to maintain the accuracy of the machine in which they are used.
Rolling contact bearings consume small amounts of lubricant and far less costly to maintain than sliding-type bearings.
To get optimum performance from a selected bearing, it is necessary to understand the design and features of the various bearings types and to then select bearings optimal to individual machine performance.
1.2.1 Deep Grove Ball BearingsDeep grove ball bearings are the most popular of all the ball bearings types because they are available in a wide variety of seals, shield and snap-ring arrangements.
The bearings ring grooves are circular arcs made slightly larger than the radius of the ball. The balls make point contact with the raceways (elliptical contact when loaded). The inner ring shoulders are of equal height (as the outer ring shoulders).
Deep groove ball bearings can sustain radial, axial, or composite loads and because of simple design, this bearings type can be produced to provide both high-running accuracy and high-speed operation.
Deep groove ball bearings having an outside diameter less then 9mm are known as miniature ball bearings. Deep groove ball bearings having an outside diameter > 9mm and a bore diameter < 10 mm are known as extra-small ball bearings.
Standard ball retainers (cages) are made from pressed steel. Machined cages are used in press steel. Machined cages are used in bearings operating at very high speeds or for large diameter bearings.
Deep groove ball bearings with seals or shields are standardized. They contain paper amount of grease in advance.
1.2.2 Single-row Angular Contact Ball BearingThe raceways of both the inner and outer rings of this bearing type are made with a set contact angle. These bearings are non-separable since the balls are inserted utilizing counter-bore construction, a larger number of balls can be installed than in the case of deep groove ball bearings.
Standard café materials may be pressed steel, high-strength brass, or synthetic resin. Cage material is dependent on the bearing series and or service condition.
Single-row angular contact ball bearings can sustain radial, axial or composite loads. However, any axial load must be in one direction.
This bearing type is generally used in pairs to handle the induced load resulting from the internal axial force generated by the applied radial load. When mounting tow single bearings in adjacent position, all bearings manufacturing brands are provides these combination parts (pairs) with readjusted clearance. Paired combination bearings are matched sets. Combination or paired bearings can be arranged BACK-TOBACK, FACE-TO-FACE, or TANDEM sets can sustain bidirectional axial loads.
1.2.3 Double-row Angular Contact Ball Bearings.The construction of this ball bearing type is similar to the adjacent, BACK-TO-BACK mounting of two single-row angular contact ball bearings. Because fewer balls can be inserted per row compared to single-row angular contact ball bearings, a double-row angular contact ball bearing will have less load capacity then an equivalent size/series BACK-TO-BACK set of two single-row angular contact ball bearings.
The type bearings can sustain radial, moment and bi-direction axial loads.
1.2.4 Self-aligning Ball BearingsThis type is constructed with the inner ring and ball assembly contained within an outer ring which has a spherical raceway. Due to the construction, this bearing type will tolerate a small angular misalignment from deflection or mounting error. Self-aligning ball bearing suitable for long shafts where accurate positioning of housing bore is difficult. This type is often used in conjunction with pillow blocks. Cages are made from pressed steel or polyamide resin.
This bearing should only be used in light axial load application due to the small axial support of the elements by outer ring raceway.
1.2.5 Cylindrical Roller Bearings.Constriction of this roller bearing type is the simplest of all radial roller bearings.
This bearing type is often used in high-speed applications. Because the inner rings, outer rings, rollers are in line contact; this bearings type has a large radial load capacity. Various cylindrical
roller bearing configurations:
N,NJ,NF,NU,RNU: integral ribs (flanges)
NH, NP, NUP, NUH: integral and loose ribs
NN, NNU: double-row bearings
Configuration having integral flags or loose ribs on both the inner and outer rings can sustain a small amount of axial load. Since this bearings type supports axial loads as sliding action between the end of the rollers and flange faces, axial loading limited
Double-row cylindrical roller bearings are used for high-speed, high-accuracy applications such as; main spindle support for lathes, milling machines, and machining centers. Radial clearance of tapered-bore bearings can be adjusted during mounting of the bearing(s) onto the mating shaft.
Standard cages are pressed steel or polyamide resin. Machined cage of high-strength brass are used for bearings of large dimension or for high-speed application.
Monday, August 4, 2008
Suffix
Clearance
C1 = Radial Clearance Less Then C2
C2 = Radial Clearance Less Then Normal
C3 = Radial Clearance Large Then Normal
C4 = Radial Clearance Large Then C3
C5 = Radial Clearance Large Then C4
Tolerance
P0 = Tolerance Class Normal
P6 = Tolerance Class P6
P5 = Tolerance Class P5
P4 = Tolerance Class P4
P2 = Tolerance Class P2
Cage
M, M1 = Brass Care
J, = Steel Cage
TV, TN9= Polaymide Cage
C1 = Radial Clearance Less Then C2
C2 = Radial Clearance Less Then Normal
C3 = Radial Clearance Large Then Normal
C4 = Radial Clearance Large Then C3
C5 = Radial Clearance Large Then C4
Tolerance
P0 = Tolerance Class Normal
P6 = Tolerance Class P6
P5 = Tolerance Class P5
P4 = Tolerance Class P4
P2 = Tolerance Class P2
Cage
M, M1 = Brass Care
J, = Steel Cage
TV, TN9= Polaymide Cage
Bearing Types
Basically there is only two type of bearing in all worlds,
1. Ball Bearings
2. Roller Bearing
One more type of bearing are manufacturing some brands but it is not in bearings category
3. Spherical Plain Bushing
1. Ball bearing
(All ball bearings suitable for high speed and low load application)
There are 4 categories of ball bearings
A. Deep Groove Ball Bearing
Suitable for low but redial load and high speed application,
Because of their versatility, single-row deep groove ball bearing are most popular of all the ball bearing types.
Deep groove ball beraing are available in a wide range of series defined by the ISO standard dimension plan and are also made to meet specialized dimension and configuration requirements. Deep groove ball bearing are manufactured in both standard precision grade (ISO Grade 0 - ABEC Grade 1) as well as in high precision grade.
B. Self Aliening ball bearings
Suitable for long (miss alignment) shaft but low load and high speed application.
Self-aligning ball bearings are selected for application where:
o angular misalignmen is expcted
o radial loads are hight to moderate
o thrust loads are nimimal
o aligning angle
Maximum premissible misalignment angle is about 4 degree under general service condition. If the aligning advantages of this bearing type are to be relized, care must be taken to provide.
o Ball assembly with (B1)
The dimension table as dimension B1 for larger bore sized of self aligning ball bearings where width of the ball assembly extends beyond the ring width enelope.
C. Angular Contact Ball Bearings
Suitable for angular but low load and high speed application.
Single row angular contact ball bearing is seldom used in single unit. Normally it is used in combination of two unttes and more.
High Precision, Paired combination Angular Contact Ball Bearings (ISO Class or better) are used for applications such as machine tool spindles, and are usually preloaded.
Double row Angular Contact Ball Bearings
This type is made in tow contact angle leavels. Some size of Double row angular contact ball beraings are available with contact seal (2NS or 2RS) or Shields (ZZ or 2ZR)
o Cage Material
The standard cage material for Double row ball bearings is pressed steel cage.
D. Thirst Ball bearing
Suitable for thirst but low load and high speed application.
Thrust ball beraings are made as single direction and double direction bearings. Single direction beraings can sustain an axial load in only one direction, whereas double direction thrust ball bearing can sustain bi-directional thrust loads.
Both single and double direction thrust ball bearings are avalable with aligning housing washers for mating with a housing having an aligning surface radius. aligning seat washers with an aligning surface radius are also available for ease of desing and mountinf against a flat housing shoulder.
o Bearing Numbers
Bearings are marked with only the lower three places of the part number.
When making a replacement for this bearings type, be sure to incluse the dimensions, design, and part number with your order.
2. Roller Bearings
(All roller bearings suitable for high load and low speed application)
A. Cylindrical Roller Bearings
Suitable for heavy radial load and low speed application.
Designs
the three main design types are:
a) Full Complement (''keystoned'')
b) Split-Cage design
c) Conventional
a) Full Complement ('' keystoned'') Cylindrical Roller Bearings.
To meet the drowing need for compact design and high radial capacity, Normally bearings manufaturing companies are producing numberous sizes of a new generation of full complements cylindrical roller bearingswhich utilize a (''keystoned'') design. The bearing design provides tolerance to miiderately high rotational speed in addition to the benefits of full roller retention.
Split Cage Cylindrical Roller bearings.
The split cage design allows location of a bearings in an intermediate shaft porition of a bearings in an intermediate shaft position where it may be impossible to use a conventional design.
Full complement and split cage cylindrical roller bearings are made to both the ISO stand dimensional plan and to dimenstions specified by the customer.
Please contact to bearings companies for design assistance regarding full complement and split cage cylindrical roller bearings.
Conventional Design. Cylindrical roller bearings of conventional design are available in 10 configurations. With the Exception of the RNU configuration (Which is the same as configuration NU less the inner ring), all parts consist of (at least) an inner ring, an outer ring, and a caged roller assembly. Configurations N, NU, RNU, NN AND NNU will not sustain axial loading. These configurations must be used as the ''free'' end bearing. Configurations NF, NJ and NUH are designed with the capability of sustaining axial loading in one direction. Configuration NUH is basically an NU bearing with the addition of a guide ring (an ''L'' ring). The NUH dimensional data is the same as the NH bearing configuration. Configurations NF, NJ, and NUH can sustain thrust loading in one direction. Confgurations NH, NP, and NUP have bidirection thrust load carrying capability.
B. Spherical Roller Bearings
Suitable for long (miss alignment) shaft but heavy load and low speed application.
Bearing Design
Spherical radial roller bearings are manufactured in a number of design of design and material configurations dependent on the type of application and seze of the dearing.
The type E cage will be provided as standard unless otherwise specified.
Lubrication Holes and Groove
The outer ring of Spherical radial roller bearings are often made with a lubrication hole and groove for feeding lubricant. The outer ring may also be configured with an oil hole only, depending on fitting, mounting, or service conditions.
Bearing type E with outside diameters of 240 mm or more have both oil gorrve and holes as standard. Bearings in this catedory can be ordered without the oil holes and groove.
Although premissible misalignment angle will vary with the series and service condition, the angle is about 2 degree under general service conditions.
Heat-Stabilized Bearings.
Heat-stabilization treatment is available for operating temperatures exceeds 0.6Fr, or for oscillating load applications (such as vibrating screens), contact bearings company for design assistance.
In addition to parts listed in this catalog, please contact bearings manufacturing companies for the following bearings for specific applications.
1) Triple ring bearings for the paper industry
2) Printing presses.
3) Split ring bearings for drive shafts, conveyors, and general use.
4) Corburized inner ring bearings for the steel industry and material processing applications.
C. Tapered Roller bearing
Suitable for angular but heavy load and low speed bearing
D. Thurst Roller Bearing
Suitable for heavy thirst load but low speed bearing.
1. Ball Bearings
2. Roller Bearing
One more type of bearing are manufacturing some brands but it is not in bearings category
3. Spherical Plain Bushing
1. Ball bearing
(All ball bearings suitable for high speed and low load application)
There are 4 categories of ball bearings
A. Deep Groove Ball Bearing
Suitable for low but redial load and high speed application,
Because of their versatility, single-row deep groove ball bearing are most popular of all the ball bearing types.
Deep groove ball beraing are available in a wide range of series defined by the ISO standard dimension plan and are also made to meet specialized dimension and configuration requirements. Deep groove ball bearing are manufactured in both standard precision grade (ISO Grade 0 - ABEC Grade 1) as well as in high precision grade.
B. Self Aliening ball bearings
Suitable for long (miss alignment) shaft but low load and high speed application.
Self-aligning ball bearings are selected for application where:
o angular misalignmen is expcted
o radial loads are hight to moderate
o thrust loads are nimimal
o aligning angle
Maximum premissible misalignment angle is about 4 degree under general service condition. If the aligning advantages of this bearing type are to be relized, care must be taken to provide.
o Ball assembly with (B1)
The dimension table as dimension B1 for larger bore sized of self aligning ball bearings where width of the ball assembly extends beyond the ring width enelope.
C. Angular Contact Ball Bearings
Suitable for angular but low load and high speed application.
Single row angular contact ball bearing is seldom used in single unit. Normally it is used in combination of two unttes and more.
High Precision, Paired combination Angular Contact Ball Bearings (ISO Class or better) are used for applications such as machine tool spindles, and are usually preloaded.
Double row Angular Contact Ball Bearings
This type is made in tow contact angle leavels. Some size of Double row angular contact ball beraings are available with contact seal (2NS or 2RS) or Shields (ZZ or 2ZR)
o Cage Material
The standard cage material for Double row ball bearings is pressed steel cage.
D. Thirst Ball bearing
Suitable for thirst but low load and high speed application.
Thrust ball beraings are made as single direction and double direction bearings. Single direction beraings can sustain an axial load in only one direction, whereas double direction thrust ball bearing can sustain bi-directional thrust loads.
Both single and double direction thrust ball bearings are avalable with aligning housing washers for mating with a housing having an aligning surface radius. aligning seat washers with an aligning surface radius are also available for ease of desing and mountinf against a flat housing shoulder.
o Bearing Numbers
Bearings are marked with only the lower three places of the part number.
When making a replacement for this bearings type, be sure to incluse the dimensions, design, and part number with your order.
2. Roller Bearings
(All roller bearings suitable for high load and low speed application)
A. Cylindrical Roller Bearings
Suitable for heavy radial load and low speed application.
Designs
the three main design types are:
a) Full Complement (''keystoned'')
b) Split-Cage design
c) Conventional
a) Full Complement ('' keystoned'') Cylindrical Roller Bearings.
To meet the drowing need for compact design and high radial capacity, Normally bearings manufaturing companies are producing numberous sizes of a new generation of full complements cylindrical roller bearingswhich utilize a (''keystoned'') design. The bearing design provides tolerance to miiderately high rotational speed in addition to the benefits of full roller retention.
Split Cage Cylindrical Roller bearings.
The split cage design allows location of a bearings in an intermediate shaft porition of a bearings in an intermediate shaft position where it may be impossible to use a conventional design.
Full complement and split cage cylindrical roller bearings are made to both the ISO stand dimensional plan and to dimenstions specified by the customer.
Please contact to bearings companies for design assistance regarding full complement and split cage cylindrical roller bearings.
Conventional Design. Cylindrical roller bearings of conventional design are available in 10 configurations. With the Exception of the RNU configuration (Which is the same as configuration NU less the inner ring), all parts consist of (at least) an inner ring, an outer ring, and a caged roller assembly. Configurations N, NU, RNU, NN AND NNU will not sustain axial loading. These configurations must be used as the ''free'' end bearing. Configurations NF, NJ and NUH are designed with the capability of sustaining axial loading in one direction. Configuration NUH is basically an NU bearing with the addition of a guide ring (an ''L'' ring). The NUH dimensional data is the same as the NH bearing configuration. Configurations NF, NJ, and NUH can sustain thrust loading in one direction. Confgurations NH, NP, and NUP have bidirection thrust load carrying capability.
B. Spherical Roller Bearings
Suitable for long (miss alignment) shaft but heavy load and low speed application.
Bearing Design
Spherical radial roller bearings are manufactured in a number of design of design and material configurations dependent on the type of application and seze of the dearing.
The type E cage will be provided as standard unless otherwise specified.
Lubrication Holes and Groove
The outer ring of Spherical radial roller bearings are often made with a lubrication hole and groove for feeding lubricant. The outer ring may also be configured with an oil hole only, depending on fitting, mounting, or service conditions.
Bearing type E with outside diameters of 240 mm or more have both oil gorrve and holes as standard. Bearings in this catedory can be ordered without the oil holes and groove.
Although premissible misalignment angle will vary with the series and service condition, the angle is about 2 degree under general service conditions.
Heat-Stabilized Bearings.
Heat-stabilization treatment is available for operating temperatures exceeds 0.6Fr, or for oscillating load applications (such as vibrating screens), contact bearings company for design assistance.
In addition to parts listed in this catalog, please contact bearings manufacturing companies for the following bearings for specific applications.
1) Triple ring bearings for the paper industry
2) Printing presses.
3) Split ring bearings for drive shafts, conveyors, and general use.
4) Corburized inner ring bearings for the steel industry and material processing applications.
C. Tapered Roller bearing
Suitable for angular but heavy load and low speed bearing
D. Thurst Roller Bearing
Suitable for heavy thirst load but low speed bearing.
Saturday, August 2, 2008
Linear Motion Bearings
Linear Motion Rolling Guides are broaly divided into two groups, identified according to balls or rollers as the rolling elements. each group is further divided into two sub groups, circulation and non-circilating rolling elments.
each type of these rolling guides has its own features readarding load carrying capacity, rigidty, frictional characteristic, etc., as summarized in table 1.
each type of these rolling guides has its own features readarding load carrying capacity, rigidty, frictional characteristic, etc., as summarized in table 1.
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