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NTN 7212B 72 series single-row angular contact ball bearing with 60 mm straight bore, open enclosure, and steel cage. High carbon chrome steel construction for combined radial and axial loads in pumps, compressors, and machine tool spindles.
MODEL 7212B
$221.42 Each
Prices are subject to change
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Returnable:No
a (Load Center)
1.8701 in
B (in)
0.8661
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)
4.3307
d (in)
2.3622
Da max
3.9961 in
da min
2.6969 in
Db max
4.1142 in
db min
2.5787 in
Double Row Width
1.7323 in
Dynamic Load Rating
12600 lbf
Dynamic load rating
12600 lbf
Enclosure
Open
I.D.
60 mm
Limiting Speed - Grease
5700 RPM
Limiting speed - grease
5700 RPM
Limiting Speed - Oil
7600 RPM
Limiting speed - oil
7600 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
3.4646 in
r (in)
0.0591
r1
0.0394 in
r1as max
0.0394 in
ras max
0.0591 in
Static Load Rating
10000 lbf
Static load rating
10000 lbf
Triple Row Width
2.5984 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 | 7600 RPM |
Limiting Speed - Grease | 5700 RPM |
Precision | ISO Class 0 |
Configuration | One |
Static Load Rating | 10000 lbf44500 N44.50 kN |
Dynamic Load Rating | 12600 lbf56000 N56.00 kN |
Enclosure | Open |
Weight | 1.753 lb0.795 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 2.3622 in60.000 mm |
D | 4.3307 in110.000 mm |
B | 0.8661 in22.000 mm |
r | 0.0591 in1.500 mm |
r1 | 0.0394 in1.000 mm |
Contact Angle | 40 |
a (Load Center) | 1.8701 in47.500 mm |
da min | 2.6969 in68.500 mm |
db min | 2.5787 in65.500 mm |
Da max | 3.9961 in101.500 mm |
Db max | 4.1142 in104.500 mm |
ras max | 0.0591 in1.500 mm |
r1as max | 0.0394 in1.000 mm |
Double Row Width | 1.7323 in44.000 mm |
Triple Row Width | 2.5984 in66.000 mm |
Quadruple Row Width | 3.4646 in88.000 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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