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NTN 7320BL1BG is a single-row angular contact ball bearing with a 100 mm straight bore. It features an open enclosure and a brass cage, suitable for high-speed and high-precision applications such as machine tool spindles and pumps.
MODEL 7320BL1BG
$988.85 Each
Prices are subject to change
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Returnable:No
a (Load Center)
3.5236 in
B (in)
1.8504
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)
8.4646
d (in)
3.9370
Da max
7.9134 in
da min
4.4882 in
Db max
8.1890 in
db min
4.2126 in
Double Row Width
3.7008 in
Dynamic Load Rating
42500 lbf
Dynamic load rating
42500 lbf
Enclosure
Open
I.D.
100 mm
Limiting Speed - Grease
3000 RPM
Limiting speed - grease
3000 RPM
Limiting Speed - Oil
4000 RPM
Limiting speed - oil
4000 RPM
Material
High carbon chrome steel
O.D.
215 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
Quadruple Row Width
7.4016 in
r (in)
0.1181
r1
0.0433 in
r1as max
0.0394 in
ras max
0.0984 in
Static Load Rating
40000 lbf
Static load rating
40000 lbf
Triple Row Width
5.5512 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 | 4000 RPM |
Limiting Speed - Grease | 3000 RPM |
Precision | ISO Class 0 |
Configuration | One |
Static Load Rating | 40000 lbf178000 N178.00 kN |
Dynamic Load Rating | 42500 lbf190000 N190.00 kN |
Enclosure | Open |
Weight | 16.138 lb7.320 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 3.9370 in100.000 mm |
D | 8.4646 in215.000 mm |
B | 1.8504 in47.000 mm |
r | 0.1181 in3.000 mm |
r1 | 0.0433 in1.100 mm |
Contact Angle | 40 |
a (Load Center) | 3.5236 in89.500 mm |
da min | 4.4882 in114.000 mm |
db min | 4.2126 in107.000 mm |
Da max | 7.9134 in201.000 mm |
Db max | 8.1890 in208.000 mm |
ras max | 0.0984 in2.500 mm |
r1as max | 0.0394 in1.000 mm |
Double Row Width | 3.7008 in94.000 mm |
Triple Row Width | 5.5512 in141.000 mm |
Quadruple Row Width | 7.4016 in188.000 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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