Technical>Deep groove ball bearing
Deep groove ball bearing
Deep groove ball bearing
HCH rolling bearing basically consists of two rings, rolling elements and a cage, which keeps the rolling elements at equal intervals. Seals and shields are applied to prevent the bearing from outside affect such as dust or oil invasion. The main purpose of lubricants in rolling bearing is to reduce friction and wear of each element.
● Deep groove ball bearing components ( ZZ type )
Notes:
The above bearing construction drawing only lists one type of inner ring construction (V-groove), which is applied usually in sealed bearings. But there are other two types of inner ring constructions applied as below chart.
Inner ring seal groove types
2) L-groove type are usually applied for miniature size HCH deep groove ball bearings with seals or shieds.
A rolling bearing's major dimensions, is known as "boundary dimensions". To facilitate international bearing interchangeability and economical bearing production, bearing boundary dimensions have been standardized by the International Standards Organization (ISO). Those boundary dimensions which have been standardized include: bearing bore diameter, outside diameter, width/height, and chamfer dimensions-all important dimensions.
Outer diameter dimensions (D) for radial bearings with standardized bore diameter dimensions (d) are covered in the “diameter series”; their corresponding width dimensions (B) are covered in the “width series“. The ISO General Plans for boundary dimensions of deep groove ball bearings contain a progressive series of standardized outside diameters for every standard bore diameter arranged in Diameter series 8, 9, 0, 2, 3, 4 (in order of increasing outside diameter).
Diameter series numbers
● Cage
Cages are mechanically stressed by frictional, strain and inertia forces and they may also be subjected to the chemical action of certain lubricants, lubricant additives or products of their ageing, organic solvents or coolants. Therefore the design and material are of paramount importance for the performance of the cage as well as for the operational reliability of the bearing itself.
Following three types of cage are widely applied in HCH deep groove ball bearings.
● Internal sealing arrangements
The performance of sealing is vital to the cleanliness of the lubricant and the overall service life of the bearing arrangement. Integral bearing seals must be able to keep contaminants out and lubricant in the bearing cavity. Sealed bearings are generally used for arrangements where a sufficiently effective external seal cannot be provided because there is inadequate space.
When selecting a seal, the following factors need to be taken into consideration: the type of lubricant (oil or grease), seal peripheral speed, shaft fitting errors, space limitations, seal friction, resultant heat increase, as well as the cost. Shields and seals
Notes:
1) This chart lists double shielded and double sealed bearings, but single shielded (Z) and single sealed (RZ, RS, RS1) are also available.
2) The above sealing structures are only for reference. We reserve the right to change specifications and other information included in this catalogue without notice.
3) HCH also could provide bearings with other sealing designs including customized sealing design. Please consult HCH engineers for more information.
Notes:
1) This chart lists double shielded and double sealed bearings, but single shielded (Z) and single sealed (RZ, RS, RS1) are also available.
2) The above sealing structures are only for reference. We reserve the right to change specifications and other information included in this catalogue without notice.
3) HCH also could provide bearings with other sealing designs including customized sealing design. Please consult HCH engineers for more information.
HCH rolling bearing basically consists of two rings, rolling elements and a cage, which keeps the rolling elements at equal intervals. Seals and shields are applied to prevent the bearing from outside affect such as dust or oil invasion. The main purpose of lubricants in rolling bearing is to reduce friction and wear of each element.
● Deep groove ball bearing components ( ZZ type )
Notes:
The above bearing construction drawing only lists one type of inner ring construction (V-groove), which is applied usually in sealed bearings. But there are other two types of inner ring constructions applied as below chart.
Inner ring seal groove types
| V-groove | L-groove | Plain |
|
|
|
Notes:
1) V-groove type are usually applied for small and medium size HCH deep groove ball bearings with seals or shieds.2) L-groove type are usually applied for miniature size HCH deep groove ball bearings with seals or shieds.
3) Plain type are usually applied for HCH open type deep groove ball bearings.
● Dimensions
A rolling bearing's major dimensions, is known as "boundary dimensions". To facilitate international bearing interchangeability and economical bearing production, bearing boundary dimensions have been standardized by the International Standards Organization (ISO). Those boundary dimensions which have been standardized include: bearing bore diameter, outside diameter, width/height, and chamfer dimensions-all important dimensions.
Outer diameter dimensions (D) for radial bearings with standardized bore diameter dimensions (d) are covered in the “diameter series”; their corresponding width dimensions (B) are covered in the “width series“. The ISO General Plans for boundary dimensions of deep groove ball bearings contain a progressive series of standardized outside diameters for every standard bore diameter arranged in Diameter series 8, 9, 0, 2, 3, 4 (in order of increasing outside diameter).
Diameter series numbers
| Metric | Diameter series (outer diameter dimensions) |
 Diameter series Diamension series |
|
| deep groove ball bearing | number 8, 9, 0, 2, 3, 4 | ||
|
● Cage
Cages are mechanically stressed by frictional, strain and inertia forces and they may also be subjected to the chemical action of certain lubricants, lubricant additives or products of their ageing, organic solvents or coolants. Therefore the design and material are of paramount importance for the performance of the cage as well as for the operational reliability of the bearing itself.
Following three types of cage are widely applied in HCH deep groove ball bearings.
| Rivet-type cage | Tongue-type cage | Polyamide cage |
|
|
|
| Made from high precision strip steel, pressed and formed with spherical ball pockets. The retainer halves are fixed together with rivets. HCH small size deep groove ball bearings widely use steel Rivet-type cages. | Made from high precision strip steel, pressed and formed with spherical ball pocket and tongue shape. The male and female retainer halves are caulked together for HCH miniature ball bearings applicatioin. | Polyamide cage are offered a range of materials, such as Nylon 6/6 with glass fiber, and has an advantage in self- lubricating property and lower acoustic noise. They are usually used in HCH ultra- low noise bearings. |
● Internal sealing arrangements
The performance of sealing is vital to the cleanliness of the lubricant and the overall service life of the bearing arrangement. Integral bearing seals must be able to keep contaminants out and lubricant in the bearing cavity. Sealed bearings are generally used for arrangements where a sufficiently effective external seal cannot be provided because there is inadequate space.
When selecting a seal, the following factors need to be taken into consideration: the type of lubricant (oil or grease), seal peripheral speed, shaft fitting errors, space limitations, seal friction, resultant heat increase, as well as the cost. Shields and seals
Notes:
1) This chart lists double shielded and double sealed bearings, but single shielded (Z) and single sealed (RZ, RS, RS1) are also available.
2) The above sealing structures are only for reference. We reserve the right to change specifications and other information included in this catalogue without notice.
3) HCH also could provide bearings with other sealing designs including customized sealing design. Please consult HCH engineers for more information.
| “V” sealing groove (inner ring) | “L” sealing groove (inner ring) | No sealing groove (inner ring) |
 Metal shields (ZZ) Non-contact High temperature Very high speed For small and medium size bearings
|
Metal shields (ZZ) Non-contact High temperature Very high speed For miniature size bearings
|
Metal shields (ZZ) Non-contact High temperature Very high speed Applicable due to assembly requirement
|
| “V” sealing groove (inner ring) | “L” sealing groove (inner ring) | No sealing groove (inner ring) |
|
Rubber seals (2RS) Contact Very good dust and water proofing For small and medium size bearings
|
Rubber seals (2RS) Contact Very good dust and water proofing For miniature size bearings
|
Rubber seals (2RS) Contact Very good dust and water proofing Applicable due to assembly requirement
|
| “V” sealing groove (inner ring) | “L” sealing groove (inner ring) | No sealing groove (inner ring) |
|
Rubber seals (2RZ) Non-contact Very high speed Good dust proofing For small and medium size ball bearings
|
Rubber seals (2RZ) Non-contact Very high speed Good dust proofing For miniature size bearings
|
Rubber seals (2RZ) Non-contact Very high speed Good dust proofing Applicable due to assembly requirement
|
| “V” sealing groove (inner ring) | “L” sealing groove (inner ring) | |
|
Rubber seals (2RS1) Contact High speed Excellent dust and water proofing For small and medium size bearings
|
Rubber seals (2RS1) Contact High speed Excellent dust and water proofing For miniazture size bearings
|
Notes:
1) This chart lists double shielded and double sealed bearings, but single shielded (Z) and single sealed (RZ, RS, RS1) are also available.
2) The above sealing structures are only for reference. We reserve the right to change specifications and other information included in this catalogue without notice.
3) HCH also could provide bearings with other sealing designs including customized sealing design. Please consult HCH engineers for more information.
