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The NTN MLE71906CVDUJ74S is a duplex angular contact ball bearing with a 30 mm straight bore. It features double sealed enclosures and a phenolic cage for high-speed precision applications. Constructed from high carbon chrome steel, this bearing is designed for machine tool spindles and other high-accuracy rotating assemblies.
MODEL MLE71906CVDUJ74S
$742.33 Each
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2B
0.3543 in
B (in)
0.3543
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Phenolic
Cage material
Phenolic
Cage Type
Stratified
Cage type
Stratified
Contact angle
17 º
D (in)
1.8504
d (in)
1.1811
D1
1.6024 in
d2
1.3583 in
d3
1.3819 in
D4
1.6457 in
Enclosure
Double Sealed
I.D.
30 mm
Material
High carbon chrome steel
O.D.
47 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
r2 max
0.0118 in
r3 max
0.0079 in
Seal Material
Nitrile Rubber
Seal material
Nitrile rubber
Seal Type
Non-Contact
Seal type
Non-Contact
Type
Angular Contact Ball Bearing
Width
0.7087
Technical Specifications
Type | Angular Contact Ball Bearing |
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | Stratified |
Cage Material | Phenolic |
Ball Material | Steel |
Seal Type | Non-Contact |
Seal Material | Nitrile Rubber |
Precision | ISO Class 4 |
Enclosure | Double Sealed |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 1.1811 in30.000 mm |
D | 1.8504 in47.000 mm |
B | 0.3543 in9.000 mm |
2B | 0.3543 in18.000 mm |
r2 max | 0.0118 in0.300 mm |
r3 max | 0.0079 in0.200 mm |
Contact Angle | 17 |
d2 | 1.3583 in34.500 mm |
d3 | 1.3819 in35.100 mm |
D1 | 1.6024 in40.700 mm |
D4 | 1.6457 in41.800 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.
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