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NTN 7212HG1UJ84 is a 72 series single-row angular contact ball bearing with a 60 mm straight bore. Open design with a phenolic cage for high-speed and high-precision applications. Constructed from high carbon chrome steel. Suitable for machine tool spindles and precision rotating assemblies.
MODEL 7212HG1UJ84
$549.97 Each
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Returnable:No
a (Load Center)
1.2205 in
B (in)
0.8661
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Phenolic
Cage material
Phenolic
Cage Type
Stratified
Cage type
Stratified
Configuration
One
Contact angle
25 º
D (in)
4.3307
d (in)
2.3622
D1
3.7402 in
d2
2.9528 in
D4
3.9961 in
D5
0.0906 in
Double Row Width
1.7323 in
Dynamic Load Rating
13950 lbf
Dynamic load rating
13950 lbf
E (in)
2.300
Enclosure
Open
I.D.
60 mm
Limiting Speed - Grease
11000 RPM
Limiting speed - grease
11000 RPM
Limiting Speed - Oil
17500 RPM
Limiting speed - oil
17500 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 4
Preload
Medium
Quadruple Row Width
3.4646 in
r2 max
0.0591 in
r3 max
0.0236 in
Static Load Rating
10575 lbf
Static load rating
10575 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 | Stratified |
Cage Material | Phenolic |
Ball Material | Steel |
Limiting Speed - Oil | 17500 RPM |
Limiting Speed - Grease | 11000 RPM |
Precision | ISO Class 4 |
Configuration | One |
Preload | Medium |
Static Load Rating | 10575 lbf47000 N47.00 kN |
Dynamic Load Rating | 13950 lbf62000 N62.00 kN |
Enclosure | Open |
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 |
r2 max | 0.0591 in1.500 mm |
r3 max | 0.0236 in0.600 mm |
Contact Angle | 25 |
a (Load Center) | 1.2205 in31.000 mm |
d2 | 2.9528 in75.000 mm |
D1 | 3.7402 in95.000 mm |
D4 | 3.9961 in101.500 mm |
D5 | 0.0906 in3.1299 mm |
E | 2.300 in79.500 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.
#5035147
Brand
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Model
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#2177891
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Model
B7212E.T.P4S.UL
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