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NTN ML71908CVDUJ74S is a high-speed duplex angular contact ball bearing with a 40 mm straight bore. This universal flush ground bearing features a phenolic cage and is open (unsealed). Constructed from high carbon chrome steel, it is designed for precision spindle and high-speed machinery applications.
MODEL ML71908CVDUJ74S
$831.12 Each
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2B
0.9449 in
B (in)
0.4724
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)
2.4409
d (in)
1.5748
D1
2.0906 in
d2
1.8425 in
d3
1.7835 in
D4
2.1417 in
D5
1.8740 in
E (in)
0.0886
Enclosure
Open
I.D.
40 mm
Material
High carbon chrome steel
O.D.
62 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Light
r2 max
0.0236 in
r3 max
0.0079 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 | 1.5748 in40.000 mm |
|---|---|
D | 2.4409 in62.000 mm |
B | 0.4724 in12.000 mm |
2B | 0.9449 in24.000 mm |
r2 max | 0.0236 in0.600 mm |
r3 max | 0.0079 in0.200 mm |
Contact Angle | 17 |
d2 | 1.8425 in46.800 mm |
d3 | 1.7835 in45.300 mm |
D1 | 2.0906 in53.100 mm |
D4 | 2.1417 in54.400 mm |
D5 | 1.8740 in47.600 mm |
E | 0.0886 in2.250 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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