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NTN 7208BG single-row angular contact ball bearing with a 40 mm straight bore. Open enclosure with a steel cage. Constructed from high carbon chrome steel for durability. Designed for combined radial and axial loads in pumps, compressors, and machine tool spindles.
MODEL 7208BG
$111.50 Each
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Returnable:No
a (Load Center)
1.3386 in
B (in)
0.7087
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
One
Contact angle
40 º
d (in)
1.5748
D (in)
3.1496
Da max
2.8740 in
da min
1.8504 in
Db max
2.9724 in
Double Row Width
1.4173 in
Dynamic Load Rating
7200 lbf
Dynamic load rating
7200 lbf
Enclosure
Open
I.D.
40 mm
Limiting Speed - Grease
8300 RPM
Limiting speed - grease
8300 RPM
Limiting Speed - Oil
11000 RPM
Limiting speed - oil
11000 RPM
Material
High carbon chrome steel
O.D.
80 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
Quadruple Row Width
2.8346 in
r (in)
0.0433
r1
0.0236 in
r1as max
0.0236 in
ras max
0.0394 in
Static Load Rating
5150 lbf
Static load rating
5150 lbf
Triple Row Width
2.1260 in
Type
Angular Contact Ball Bearing
Technical Specifications
Type | Angular Contact Ball Bearing |
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | Pressed |
Cage Material | Steel |
Ball Material | Steel |
Limiting Speed - Oil | 11000 RPM |
Limiting Speed - Grease | 8300 RPM |
Precision | ISO Class 0 |
Configuration | One |
Static Load Rating | 5150 lbf23000 N23.00 kN |
Dynamic Load Rating | 7200 lbf32000 N32.00 kN |
Enclosure | Open |
Weight | 0.831 lb0.377 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 | 0.7087 in18.000 mm |
r | 0.0433 in1.100 mm |
r1 | 0.0236 in0.600 mm |
Contact Angle | 40 |
a (Load Center) | 1.3386 in34.000 mm |
da min | 1.8504 in47.000 mm |
Da max | 2.8740 in73.000 mm |
Db max | 2.9724 in75.500 mm |
ras max | 0.0394 in1.000 mm |
r1as max | 0.0236 in0.600 mm |
Double Row Width | 1.4173 in36.000 mm |
Triple Row Width | 2.1260 in54.000 mm |
Quadruple Row Width | 2.8346 in72.000 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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