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NTN 7310BL1BG is a single-row angular contact ball bearing with a 50 mm straight bore. It features an open enclosure and a brass cage, suitable for high-speed and high-precision applications requiring axial load capacity in one direction. Constructed from high carbon chrome steel.
MODEL 7310BL1BG
$203.19 Each
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Returnable:No
a (Load Center)
1.8504 in
B (in)
1.0630
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)
1.9685
D (in)
4.3307
Da max
3.9370 in
da min
2.3622 in
Db max
4.1142 in
db min
2.1850 in
Double Row Width
2.1260 in
Dynamic Load Rating
15300 lbf
Dynamic load rating
15300 lbf
Enclosure
Open
I.D.
50 mm
Limiting Speed - Grease
6000 RPM
Limiting speed - grease
6000 RPM
Limiting Speed - Oil
8100 RPM
Limiting speed - oil
8100 RPM
Material
High carbon chrome steel
O.D.
110 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
Quadruple Row Width
4.2520 in
r (in)
0.0787
r1
0.0394 in
r1as max
0.0394 in
ras max
0.0787 in
Static Load Rating
10800 lbf
Static load rating
10800 lbf
Triple Row Width
3.1890 in
Type
Angular Contact Ball Bearing
Width
27 mm
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 | 8100 RPM |
Limiting Speed - Grease | 6000 RPM |
Precision | ISO Class 0 |
Configuration | One |
Static Load Rating | 10800 lbf48000 N48.00 kN |
Dynamic Load Rating | 15300 lbf68000 N68.00 kN |
Enclosure | Open |
Weight | 2.377 lb1.078 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 1.9685 in50.000 mm |
D | 4.3307 in110.000 mm |
B | 1.0630 in27.000 mm |
r | 0.0787 in2.000 mm |
r1 | 0.0394 in1.000 mm |
Contact Angle | 40 |
a (Load Center) | 1.8504 in47.000 mm |
da min | 2.3622 in60.000 mm |
db min | 2.1850 in55.500 mm |
Da max | 3.9370 in100.000 mm |
Db max | 4.1142 in104.500 mm |
ras max | 0.0787 in2.000 mm |
r1as max | 0.0394 in1.000 mm |
Double Row Width | 2.1260 in54.000 mm |
Triple Row Width | 3.1890 in81.000 mm |
Quadruple Row Width | 4.2520 in108.000 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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