IBC 7004.BE Angular Contact Ball Bearing 20 × 47 × 12 mm

Angular Contact Ball Bearing

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Category: Angular Contact Ball Bearing
Bore: 20 mm
Outer Ø: 47 mm
Width: 12 mm

Overview

IBC 7004.BE Angular Contact Ball Bearing supports combined radial and one-direction axial load through a defined contact angle. It is a high-speed, high-precision choice for pumps, compressors, machine tools, and spindle-related positions where axial rigidity and rotational accuracy matter.

The inner and outer ring raceways are offset to create a contact angle. Single-row, double-row, or matched arrangements can be used to meet axial load direction, preload, and rigidity requirements.

Key features

Supports combined radial and one-direction axial load
High-speed and high-accuracy operation
Preload and rigidity adjustable through matched mounting
Suitable for precision rotating assemblies

Typical applications

Machine tool spindles and support shafts
Pumps and compressors
High-speed motors
Precision gearboxes and robot drives

Selection guidance

Select by contact angle, arrangement, preload, precision class, axial load direction, and operating speed.

Symbol	Value	Description
Cr	12700 N	Basic dynamic load rating, radial
C_0r	7000 N	Basic static load rating, radial
C_u	260 N	Fatigue limit load
n_G	14000 1/min	Limiting speed (grease)
n_O	20700 1/min	Limiting speed (oil-air)
≈m	0.061 kg	Weight
α	40 °	Contact angle

Symbol	Value	Description
d	20 mm	Bore diameter
D	47 mm	Outside diameter
B	12 mm	Width
a	20 mm	Effective load centre
d₁	28.9 mm	Shoulder diameter, inner ring
D₁	34.1 mm	Shoulder diameter, outer ring
r_{1,2 min}	0.6 mm	Minimum chamfer dimension
r_{3,4 min}	0.3 mm	Minimum chamfer dimension, side face

Symbol	Value	Description
d_{a min}	23.2 mm	Min. shoulder diameter for mounting, inner ring
D_{a max}	38.8 mm	Max. shoulder diameter for mounting, housing
D_{b max}	40 mm	Max. shoulder diameter, sealed side
r_{a max}	0.6 mm	Max. fillet radius
r_{b max}	0.3 mm	Max. fillet radius, side face

Code	Description
100Cr6	Ring material
Single row angular contact ball bearing, 40° (BE series)	Product type

datasheet pdf download

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