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NTN 7020HVDUJ94 is a 70 series duplex angular contact ball bearing with a 100 mm straight bore. It features a phenolic cage, open enclosure, and universal flush ground design for high-precision applications. Constructed from high carbon chrome steel, this bearing is suitable for machine tool spindles and other precision rotating assemblies.
MODEL 7020HVDUJ94
$2,450.59 Each
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2B
1.8898 in
B (in)
0.9449
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Phenolic
Cage material
Phenolic
Cage Type
Stratified
Cage type
Stratified
Configuration
Two
Contact angle
25 º
D (in)
5.9055
d (in)
3.9370
D1
5.3346 in
d2
4.5079 in
D4
5.5709 in
D5
4.7126 in
E (in)
0.1496
Enclosure
Open
I.D.
100 mm
Material
High carbon chrome steel
O.D.
150 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Heavy
r2 max
0.0591 in
r3 max
0.0394 in
Type
Angular Contact Ball Bearing
Technical Specifications
Type | Angular Contact Ball Bearing |
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | Stratified |
Cage Material | Phenolic |
Ball Material | Steel |
Precision | ISO Class 4 |
Configuration | Two |
Preload | Heavy |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 3.9370 in100.000 mm |
D | 5.9055 in150.000 mm |
B | 0.9449 in24.000 mm |
2B | 1.8898 in48.000 mm |
r2 max | 0.0591 in1.500 mm |
r3 max | 0.0394 in1.000 mm |
Contact Angle | 25 |
d2 | 4.5079 in114.500 mm |
D1 | 5.3346 in135.500 mm |
D4 | 5.5709 in141.500 mm |
D5 | 4.7126 in119.700 mm |
E | 0.1496 in3.800 mm |
How do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
What is the difference between deep groove and angular contact ball bearings?
Deep groove ball bearings are the most common type. They’re designed to handle mainly radial loads, but they can also take some axial load in both directions. They’re simple, versatile, and used in everything from motors to conveyors. Angular contact ball bearings are built for combined loads, especially where there’s significant axial force in one direction. They’re often used in pairs and are common in higher precision or higher load applications like pumps and gearboxes. If your load is mostly radial, go deep groove. If axial load matters more, angular contact is usually the better choice.
#5034928
Brand
NSK Bearings
Model
7020A5TRDUHP4Y
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