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NTN ML7009CVDUJ74S is a high-speed duplex angular contact ball bearing with a 45 mm straight bore. This universal flush-ground pair features a phenolic cage and open enclosure, constructed from high carbon chrome steel. Designed for precision spindle and machine tool applications requiring matched preload and high-speed capability.
MODEL ML7009CVDUJ74S
$1,108.18 Each
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2B
1.2598 in
B (in)
0.6299
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
17 º
D (in)
2.9528
d (in)
1.7717
D1
2.4803 in
d2
2.1535 in
d3
2.0866 in
D4
2.5591 in
D5
2.2087 in
E (in)
0.1201
Enclosure
Open
I.D.
45 mm
Material
High carbon chrome steel
O.D.
75 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Light
r2 max
0.0394 in
r3 max
0.0118 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 | Light |
| Enclosure | Open |
| Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
| d | 1.7717 in45.000 mm |
|---|---|
| D | 2.9528 in75.000 mm |
| B | 0.6299 in16.000 mm |
| 2B | 1.2598 in32.000 mm |
| r2 max | 0.0394 in1.000 mm |
| r3 max | 0.0118 in0.300 mm |
| Contact Angle | 17 |
| d2 | 2.1535 in54.700 mm |
| d3 | 2.0866 in53.000 mm |
| D1 | 2.4803 in63.000 mm |
| D4 | 2.5591 in65.000 mm |
| D5 | 2.2087 in56.100 mm |
| E | 0.1201 in3.050 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.
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