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NTN 7312BL1BG is a 73 series single-row angular contact ball bearing with a 60 mm straight bore. It features an open enclosure and a brass cage. Constructed from high carbon chrome steel, this bearing is designed for applications requiring combined radial and axial loads.
MODEL 7312BL1BG
$229.50 Each
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Returnable:No
a (Load Center)
2.2047 in
B (in)
1.2205
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)
2.3622
D (in)
5.1181
Da max
4.6457 in
da min
2.8346 in
Db max
4.8425 in
db min
2.6378 in
Double Row Width
2.4409 in
Dynamic Load Rating
20200 lbf
Dynamic load rating
20200 lbf
Enclosure
Open
I.D.
60 mm
Limiting Speed - Grease
5100 RPM
Limiting speed - grease
5100 RPM
Limiting Speed - Oil
6800 RPM
Limiting speed - oil
6800 RPM
Material
High carbon chrome steel
O.D.
130 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
Quadruple Row Width
4.8819 in
r (in)
0.0827
r1
0.0433 in
r1as max
0.0394 in
ras max
0.0787 in
Static Load Rating
14800 lbf
Static load rating
14800 lbf
Triple Row Width
3.6614 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 | 6800 RPM |
Limiting Speed - Grease | 5100 RPM |
Precision | ISO Class 0 |
Configuration | One |
Static Load Rating | 14800 lbf66000 N66.00 kN |
Dynamic Load Rating | 20200 lbf90000 N90.00 kN |
Enclosure | Open |
Weight | 3.785 lb1.717 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 2.3622 in60.000 mm |
D | 5.1181 in130.000 mm |
B | 1.2205 in31.000 mm |
r | 0.0827 in2.100 mm |
r1 | 0.0433 in1.100 mm |
Contact Angle | 40 |
a (Load Center) | 2.2047 in56.000 mm |
da min | 2.8346 in72.000 mm |
db min | 2.6378 in67.000 mm |
Da max | 4.6457 in118.000 mm |
Db max | 4.8425 in123.000 mm |
ras max | 0.0787 in2.000 mm |
r1as max | 0.0394 in1.000 mm |
Double Row Width | 2.4409 in62.000 mm |
Triple Row Width | 3.6614 in93.000 mm |
Quadruple Row Width | 4.8819 in124.000 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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