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NTN 7213HG1DUJ74 is a 72 series duplex angular contact ball bearing with a 65 mm straight bore. Open design with a phenolic cage. Universal flush ground for mounting in pairs. High carbon chrome steel construction. Suitable for high-precision machine tool spindles and other applications requiring accurate axial and radial load support.
MODEL 7213HG1DUJ74
$1,227.47 Each
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2B
1.8110 in
B (in)
0.9055
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
Two
Contact angle
25 º
D (in)
4.7244
d (in)
2.5591
D1
4.0945 in
d2
3.1890 in
D4
4.2913 in
D5
3.4252 in
E (in)
0.0906
Enclosure
Open
I.D.
65 mm
Material
High carbon chrome steel
O.D.
120 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Light
r2 max
0.0591 in
r3 max
0.0236 in
Type
Angular Contact Ball Bearing
Width
1.811
Technical Specifications
Type | Angular Contact Ball Bearing |
|---|---|
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | Stratified |
Cage Material | Phenolic |
Ball Material | Steel |
Precision | ISO Class 4 |
Configuration | Two |
Preload | Light |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 2.5591 in65.000 mm |
|---|---|
D | 4.7244 in120.000 mm |
B | 0.9055 in23.000 mm |
2B | 1.8110 in46.000 mm |
r2 max | 0.0591 in1.500 mm |
r3 max | 0.0236 in0.600 mm |
Contact Angle | 25 |
d2 | 3.1890 in81.000 mm |
D1 | 4.0945 in104.000 mm |
D4 | 4.2913 in109.000 mm |
D5 | 3.4252 in87.000 mm |
E | 0.0906 in2.300 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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