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NTN 7313BG 73 series single-row angular contact ball bearing with 65 mm straight bore. Open enclosure with steel cage, high carbon chrome steel construction. Designed for combined radial and axial loads in pumps, compressors, and machine tool spindles.
MODEL 7313BG
$253.46 Each
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Returnable:No
a (Load Center)
2.3425 in
B (in)
1.2992
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)
5.5118
d (in)
2.5591
Da max
5.0394 in
da min
3.0315 in
Db max
5.2362 in
db min
2.8346 in
Double Row Width
2.5984 in
Dynamic Load Rating
22900 lbf
Dynamic load rating
22900 lbf
Enclosure
Open
I.D.
65 mm
Limiting Speed - Grease
4700 RPM
Limiting speed - grease
4700 RPM
Limiting Speed - Oil
6300 RPM
Limiting speed - oil
6300 RPM
Material
High carbon chrome steel
O.D.
140 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
Quadruple Row Width
5.1969 in
r (in)
0.0827
r1
0.0433 in
r1as max
0.0394 in
ras max
0.0787 in
Static Load Rating
16900 lbf
Static load rating
16900 lbf
Triple Row Width
3.8976 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 |
6300 RPM |
Limiting Speed - Grease |
4700 RPM |
Precision |
ISO Class 0 |
Configuration |
One |
Static Load Rating |
16900 lbf75000 N75.00 kN |
Dynamic Load Rating |
22900 lbf102000 N102.00 kN |
Enclosure |
Open |
Weight |
4.696 lb2.130 kg |
Operating Temperature Range |
-40 to 250 F-40 to 120 C |
Dimensional Specifications
|
|
|
d |
2.5591 in65.000 mm |
D |
5.5118 in140.000 mm |
B |
1.2992 in33.000 mm |
r |
0.0827 in2.100 mm |
r1 |
0.0433 in1.100 mm |
Contact Angle |
40 |
a (Load Center) |
2.3425 in59.500 mm |
da min |
3.0315 in77.000 mm |
db min |
2.8346 in72.000 mm |
Da max |
5.0394 in128.000 mm |
Db max |
5.2362 in133.000 mm |
ras max |
0.0787 in2.000 mm |
r1as max |
0.0394 in1.000 mm |
Double Row Width |
2.5984 in66.000 mm |
Triple Row Width |
3.8976 in99.000 mm |
Quadruple Row Width |
5.1969 in132.000 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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