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NTN 7208BL1G/GL is a 72 series single-row angular contact ball bearing with a 40 mm straight bore. Open enclosure with a brass cage. Constructed from high carbon chrome steel. Designed for combined radial and axial loads in machine tool spindles, pumps, and gearboxes.
MODEL 7208BL1G/GL
$115.08 Each
Prices are subject to change
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Returnable:No
a (Load Center)
1.0433 in
B (in)
0.7087
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Brass
Cage material
Brass
Cage Type
Machined
Cage type
Machined
Configuration
One
Contact angle
40 º
D (in)
3.1496
d (in)
1.5748
Da max
2.8740 in
da min
1.8504 in
Db max
2.9724 in
db min
1.7520 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
Preload
Light
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 | Machined |
Cage Material | Brass |
Ball Material | Steel |
Limiting Speed - Oil | 11000 RPM |
Limiting Speed - Grease | 8300 RPM |
Precision | ISO Class 0 |
Configuration | One |
Preload | Light |
Static Load Rating | 5150 lbf23000 N23.00 kN |
Dynamic Load Rating | 7200 lbf32000 N32.00 kN |
Enclosure | Open |
Weight | 0.794 lb0.360 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) | 1.0433 in26.500 mm |
da min | 1.8504 in47.000 mm |
db min | 1.7520 in44.500 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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