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NTN 7208HG1DUJ94 is a 72 series single-row angular contact ball bearing with a 40 mm straight bore. Open design with a phenolic cage and universal flush ground configuration for duplex mounting. Suitable for high-precision machine tool spindles and other applications requiring matched bearing sets.
MODEL 7208HG1DUJ94
$689.75 Each
Prices are subject to change
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2B
1.4173 in
B (in)
0.7087
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)
3.1496
d (in)
1.5748
D1
2.6614 in
d2
2.0787 in
D4
2.8268 in
D5
2.2402 in
E (in)
0.1594
Enclosure
Open
I.D.
40 mm
Material
High carbon chrome steel
O.D.
80 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Heavy
r2 max
0.0433 in
r3 max
0.0236 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 | 1.5748 in40.000 mm |
D | 3.1496 in80.000 mm |
B | 0.7087 in18.000 mm |
2B | 1.4173 in36.000 mm |
r2 max | 0.0433 in1.100 mm |
r3 max | 0.0236 in0.600 mm |
Contact Angle | 25 |
d2 | 2.0787 in52.800 mm |
D1 | 2.6614 in67.600 mm |
D4 | 2.8268 in71.800 mm |
D5 | 2.2402 in56.900 mm |
E | 0.1594 in4.050 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.
#5035086
Brand
NSK Bearings
Model
7208A5TRDUHP4Y
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