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NTN 7008CVDUJ84 is a 70 series duplex angular contact ball bearing with a 40 mm straight bore. It features a universal flush ground design for back-to-back or face-to-face mounting, a phenolic cage, and an open enclosure. Constructed from high carbon chrome steel, it is suitable for high-precision spindle and machine tool applications.
MODEL 7008CVDUJ84
$672.13 Each
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2B
1.1811 in
B (in)
0.5906
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
15 º
D (in)
2.6772
d (in)
1.5748
D1
2.3228 in
d2
1.9370 in
D4
2.4331 in
D5
2.0394 in
E (in)
0.1004
Enclosure
Open
I.D.
40 mm
Material
High carbon chrome steel
O.D.
68 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Medium
r2 max
0.0394 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 | Medium |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 1.5748 in40.000 mm |
D | 2.6772 in68.000 mm |
B | 0.5906 in15.000 mm |
2B | 1.1811 in30.000 mm |
r2 max | 0.0394 in1.000 mm |
r3 max | 0.0236 in0.600 mm |
Contact Angle | 15 |
d2 | 1.9370 in49.200 mm |
D1 | 2.3228 in59.000 mm |
D4 | 2.4331 in61.800 mm |
D5 | 2.0394 in51.800 mm |
E | 0.1004 in2.550 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.
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