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NTN 5208NR double-row angular contact ball bearing with a 40 mm straight bore. Open type with snap ring groove for axial location. Steel cage and high carbon chrome steel construction. Designed for combined radial and axial loads in gearboxes, pumps, and industrial machinery.
MODEL 5208NR
$120.31 Each
Prices are subject to change
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A (in)
0.1209
a (in)
1.8701
B (in)
1.1890
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Steel
Cage material
Steel
Cage Type
Pressed
Cage type
Pressed
Configuration
Two
Contact angle
25 º
D (in)
3.1496
d (in)
1.5748
D1
3.0039 in
D2
3.4094 in
Da max
2.8740 in
da min
1.8504 in
Dynamic Load Rating
9900 lbf
Dynamic load rating
9900 lbf
Enclosure
Open
f (in)
0.0748
I.D.
40 mm
Limiting Speed - Grease
5600 RPM
Limiting speed - grease
5600 RPM
Limiting Speed - Oil
7100 RPM
Limiting speed - oil
7100 RPM
Material
High carbon chrome steel
O.D.
80 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Outside Ring Type
Straight
Precision
Class 0
r (in)
0.0433
Radial Internal Clearance
CN
Radial internal clearance
CN
ras max
0.0394 in
Static Load Rating
7550 lbf
Static load rating
7550 lbf
Type
Angular Contact Ball Bearing
Technical Specifications
Type | Angular Contact Ball Bearing |
|---|---|
Bore Type | Round |
Outside Ring Type | Straight |
Material | High Carbon Chrome Steel |
Cage Type | Pressed |
Cage Material | Steel |
Ball Material | Steel |
Limiting Speed - Oil | 7100 RPM |
Limiting Speed - Grease | 5600 RPM |
Precision | Class 0 |
Configuration | Two |
Radial Internal Clearance | CN |
Static Load Rating | 7550 lbf33500 N33.50 kN |
Dynamic Load Rating | 9900 lbf44000 N44.00 kN |
Enclosure | Open |
Weight | 1.358 lb0.616 kg |
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 | 1.1890 in30.200 mm |
A | 0.1209 in3.070 mm |
D2 | 3.4094 in86.600 mm |
D1 | 3.0039 in76.300 mm |
f | 0.0748 in1.900 mm |
r | 0.0433 in1.100 mm |
Contact Angle | 25 |
a | 1.8701 in47.500 mm |
da min | 1.8504 in47.000 mm |
Da max | 2.8740 in73.000 mm |
ras max | 0.0394 in1.000 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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