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Angular Ball Bearing (7008DB)

Angular Ball Bearing 7008DB
  • On Sale Till 31/03/2025
Check FAQ of this product (6 items)

NTN

NTN

Angular ball bearings that can receive a certain amount of axial (axial direction) load.
[Features]
・ The straight line connecting the contact points between the ball and the inner and outer rings has an angle with respect to the radial direction.
・ Radial load and unidirectional axial load can be applied.
・ When a radial load acts, an axial component force is generated, so 2 are generally used facing each other.
[Applications]
・ Ideal for machine tools, feed screw mechanisms, ball screw support units, etc.

(i)Caution

  • The value in the "Width (mm)" column of the product specifications is the value for a single column even in the case of a combination of multiple columns. (Catalog B dimension)Please note that the width of the actual multi-row combination is twice the stated dimension (2B).
  • Product supply for some items in this series are unstable and may experience either longer delivery time or sales suspension

PDF

Drawing

Angular ball bearing, drawing
Angular ball bearing, drawing

Mounting dimensional drawing

Angular ball bearing, drawing

Mounting dimensional drawing

Product features details

Angular Ball Bearing Product Feature Details
This permissible rotational speed is the permissible rotational speed that can be achieved based on the following assumptions.
・ Using
under conditions where an appropriate amount of grease is sealed, and the heat generated by sufficient familiar operation, cooling of the outer cylinder, etc., is removed.
・ Use with constant pressure preload.

Type, structure and features of angular ball bearings

Angular ball bearings are non-separable bearings, and the straight line connecting the contact points between the ball and the inner and outer rings has a certain angle (contact angle) with respect to the radial direction. (Refer to Figure 1)The contact angle and contact angle symbol are shown in Table 1.
A radial load and a unidirectional axial load can be applied. Also, when a radial load acts, an axial component force is generated, so two are generally used facing each other. Table 2 shows the angular ball bearing,
Table 3 shows the combination angular ball bearings. For bearings with a contact angle of 15° and bearing accuracy of JIS 5 class or higher, refer to Precision Rolling Bearing (CAT. No. 2260/J).

Angular Ball Bearing Specifications 02

Angular Ball Bearing

Contact Angle15° 30° 40°
Symbol of contact angleC A1) B

*1) Contact angle symbol A is omitted.

Table 2 Classification and characteristics of angular ball bearings

ClassificationFeatures
Standard type・ The bearing series includes 79, 70, 72, 72B, 73 and 73B.
・ The contact angles are 30° and 40° (with B).
・ The standard retainer type depends on the bearing model number. (Please refer to Table 4)

Table 3 Combination type and features of combination angular ball bearings

Combination TypeFeatures
Back combination
(DB)		・ It can receive radial load and axial load in both directions.
・ Since the distance l between the working points of the bearing is large, the load capacity of the moment load is large.
・ The allowable tilt angle is small.
Front combination
(DF)		・ It can receive radial load and axial load in both directions.
・ The distance l between the working points of the bearing is small, and the load capacity of the moment load is small.
・ The permissible tilt angle is larger than the back combination.
Parallel combination
(DT)		・ It can receive radial load and unidirectional axial load.
・ Since 2 pieces receive an axial load, a large axial load can be received

Remarks 1. Since the bearings are manufactured as a set to adjust the internal clearance or preload amount of the bearings, bearings with the same product number must be used in combination.

Table 4 Standard retainer type for angular ball bearings

ClassificationBearing seriesResin molding retainerPressed retainerMachined retainer
Standard type79
70
72
73
72B
73B		7904 to 7913
7000 to 7024
―
―
―
―		―
―
7200 to 7222
7300 to 7322
7200B~7222B
7300B~7322B		7914 to 7960
7026 to 7040
7224 to 7240
7324 to 7340
7224B~7240B
7324B~7340B

Note: The resin molding retainer cannot be used at high temperatures exceeding 120°C due to its material properties.

30
45
60
  1. 1
Part Number
7008DB
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipRoHSInner Dia. d
(Ø) 		Outer Dia. D
(Ø) 		Width B
(mm) 		Raceway Ring Shape Bearing Type Outer Ring Type Inner/Outer Ring Material Basic Dynamic Load Rating
(N) 		Specifications/Environment Precision (JIS) Load Direction Rolling Element Material Size Standards Number of Raceway Ring Rows Max. Allowable Rotational Speed
(rpm) 		Combination of Angular Contact Ball Bearings Retainer Type Sealing Structure Types Ordering Code Contact angle symbol Combination symbol Preload Mark Accuracy Symbol Holder Symbol Internal change symbol

SGD 45.00

SGD 9.00

1 Piece(s) Quote -406830Angular Contact Ball (Double Row)Open TypeFlatSteel30500StandardGrade 0RadialSteelMetric SystemDouble Row8300Back CombinationResin Forming-7*** series819-6411ADB----

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  1. 1
 

Please check the type/dimensions/specifications of the part 7008DB in the Angular Ball Bearing series.

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Specification/Dimensions

  • Sealing Structure

    • No seal

    Clear

  • type

    • 70**
    • 72**
    • 73**
    • 79**U

    Clear

  • Inner Dia. d(Ø)

    • 10
    • 12
    • 15
    • 17
    • 20
    • 25
    • 30
    • 35
    • 40
    • 45
    • 50
    • 55
    • 60
    • 65
    • 70
    • 75
    • 80
    • 85
    • 90
    • 95
    • 100
    • 105
    • 120
    • 130
    • 150
    • 160
    • 180

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  • Outer Dia. D(Ø)

    • 26
    • 28
    • 30
    • 32
    • 35
    • 37
    • 40
    • 42
    • 47
    • 52
    • 55
    • 62
    • 68
    • 72
    • 75
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    • 90
    • 95
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    • 115
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    • 160
    • 170
    • 180
    • 190
    • 200
    • 215
    • 225
    • 230
    • 240
    • 260
    • 270
    • 280
    • 320

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  • Width B(mm)

    • 8
    • 9
    • 10
    • 11
    • 12
    • 13
    • 14
    • 15
    • 16
    • 17
    • 18
    • 19
    • 20
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    • 47
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    • 49
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    • 52
    • 54
    • 55
    • 58
    • 62
    • 64
    • 66
    • 68
    • 70
    • 78
    • 82
    • 86
    • 90

    Clear

  • Raceway Ring Shape

    • Angular Bearing (Single)
    • Angular Contact Ball (Double Row)

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  • Bearing Type

    • Open Type

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  • Outer Ring Type

    • Flat

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  • Inner/Outer Ring Material

    • Steel

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  • Basic Dynamic Load Rating(N)

    • 5,100
    • 7,600
    • 8,300
    • 9,400
    • 9,700
    • 28,500
    • 33,500
    • 36,000
    • 36,500
    • 40,000
    • 41,500
    • 3660$8200
    • 4650
    • 5000
    • 5050
    • 5450
    • 5800
    • 7000
    • 7150
    • 7500
    • 7600
    • 8350
    • 8800
    • 9050
    • 9400
    • 9500
    • 9700
    • 10100
    • 10700
    • 11000
    • 11200
    • 11400
    • 11600
    • 12000
    • 12300
    • 12500
    • 13300
    • 13600
    • 13900
    • 14500
    • 14700
    • 14800
    • 15800
    • 15900
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    • 17300
    • 17500
    • 18700
    • 18800
    • 19400
    • 20500
    • 21900
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    • 22500
    • 23600
    • 23700
    • 24400
    • 25900
    • 26200
    • 26300
    • 26400
    • 26900
    • 27100
    • 28500
    • 29700
    • 30500
    • 31000
    • 32000
    • 33500
    • 35500
    • 36000
    • 36500
    • 37500
    • 39500
    • 40000
    • 41500
    • 42500
    • 43000
    • 43500
    • 45000
    • 46500
    • 48500
    • 49000
    • 50000
    • 50500
    • 51000
    • 52000
    • 53500
    • 54500
    • 55000
    • 57500
    • 58500
    • 59500
    • 61500
    • 63500
    • 64500
    • 65000
    • 67000
    • 68000
    • 68500
    • 69000
    • 69500
    • 70500
    • 71000
    • 71500
    • 73000
    • 74500
    • 76500
    • 79000
    • 79500
    • 80500
    • 83000
    • 86000
    • 86500
    • 89000
    • 90000
    • 95000
    • 98000
    • 100000
    • 102000
    • 103000
    • 107000
    • 114000
    • 121000
    • 124000
    • 125000
    • 128000
    • 130000
    • 135000
    • 139000
    • 146000
    • 155000
    • 156000
    • 159000
    • 165000
    • 166000
    • 167000
    • 171000
    • 177000
    • 183000
    • 186000
    • 190000
    • 196000
    • 202000
    • 203000
    • 207000
    • 212000
    • 219000
    • 225000
    • 232000
    • 233000
    • 236000
    • 239000
    • 250000
    • 258000
    • 272000
    • 276000
    • 277000
    • 297000

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  • Specifications/Environment

    • Standard

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  • Precision (JIS)

    • Grade 0
    • Grade 4
    • Grade 5

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  • Load Direction

    • Radial
    • Thrust

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  • Rolling Element Material

    • Steel

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  • Size Standards

    • Metric System

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  • Number of Raceway Ring Rows

    • Single Row
    • Double Row

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  • Combination of Angular Contact Ball Bearings

    • Single Row
    • Back Combination
    • Front Combination
    • Tandem Arrangement

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  • Retainer Type

    • Punching
    • Momi removing
    • Resin Forming

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  • Types

    • 7*** series
    • Bearing for the main shaft

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  • CAD

    • 2D
    • 3D

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Days to Ship

    • All
    • Same day
    • 3 Day(s) or Less
    • 4 Day(s) or Less
    • 6 Day(s) or Less
    • 7 Day(s) or Less
    • 8 Day(s) or Less
    • 9 Day(s) or Less
    • 10 Day(s) or Less
    • 13 Day(s) or Less

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Specify Alterations

  • The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently asked question (FAQ)

Question: What is an angular contact ball bearing?
Answer: An angular contact ball bearing with a contact angle is suitable for applications requiring high precision and high-speed rotation and can accommodate combined loads. The contact angles are 15°, 30°, and 40°; the smaller the contact angle, the more suitable it is for high-speed rotation. Conversely, the larger the angle, the greater the axial load capacity.
Question: In what ways are angular contact ball bearings inferior to other bearings?
Answer: While deep groove ball bearings can bear axial loads from both directions, angular contact ball bearings can only bear axial loads from one direction.
Question: What applications are they suitable for?
Answer: They are suitable for high-precision machinery and machines that require high-speed rotation. They are used in applications such as precision machinery, spindles, and power tools.
Question: What are the maintenance considerations?
Answer: Proper lubrication and appropriate installation are crucial. Overloading and improper handling can lead to failures.
Question: What is the operating temperature range?
Answer: Angular bearings are generally used within a temperature range of approximately -30°C to 120°C under normal operating conditions. We also have some types of products which can be used in high temperature range. Therefore, please check our e-Catalogue & manufacture's Catalogue.
Question: What is the difference between single row and Combination types?
Answer: The single row type can only accommodate axial loads in one direction, while Combination types can accommodate axial loads in both directions and has higher axial load capacity and stability compared to the single row type.

Check other FAQ (3 items) Hide

Similar Part Numbers

Part Number
7000ADF
7000ADF/GN
7000DB
7009
7009A
7009ADB
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipRoHSInner Dia. d
(Ø) 		Outer Dia. D
(Ø) 		Width B
(mm) 		Raceway Ring Shape Bearing Type Outer Ring Type Inner/Outer Ring Material Basic Dynamic Load Rating
(N) 		Specifications/Environment Precision (JIS) Load Direction Rolling Element Material Size Standards Number of Raceway Ring Rows Max. Allowable Rotational Speed
(rpm) 		Combination of Angular Contact Ball Bearings Retainer Type Sealing Structure Types Ordering Code Contact angle symbol Combination symbol Preload Mark Accuracy Symbol Holder Symbol Internal change symbol

SGD 20.80

1 Piece(s) 7 Day(s) or more -10268Angular Contact Ball (Double Row)Open TypeFlatSteel8,300StandardGrade 0RadialSteelMetric SystemDouble Row23,000Front CombinationResin Forming-7*** series-ADF----

SGD 20.52

1 Piece(s) 7 Day(s) or more 10102616Angular Contact Ball (Double Row)Open TypeFlatSteel7500StandardGrade 0RadialSteelMetric SystemDouble Row23000Front CombinationResin Forming-7*** series-ADF/GN---

SGD 19.90

1 Piece(s) Same day -102616Angular Contact Ball (Double Row)Open TypeFlatSteel7500StandardGrade 0RadialSteelMetric SystemDouble Row23000Back CombinationResin Forming-7*** series819-6390ADB----

SGD 24.70

1 Piece(s) 8 Day(s) 10457516Angular Bearing (Single)Open TypeFlatSteel22300StandardGrade 0RadialSteelMetric SystemSingle Row9500-Resin Forming-7*** series819-6212A-----

SGD 24.70

1 Piece(s) 10 Day(s) or more -457516Angular Bearing (Single)Open TypeFlatSteel22300StandardGrade 0RadialSteelMetric SystemSingle Row9,500-Resin Forming-7*** series-A-----

SGD 58.40

1 Piece(s) 7 Day(s) or more -457516Angular Contact Ball (Double Row)Open TypeFlatSteel36,000StandardGrade 0RadialSteelMetric SystemDouble Row7,500Back CombinationResin Forming-7*** series-ADB----

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