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NTN CH7210CG1DUJ74 is a duplex hybrid angular contact ball bearing with a 50 mm straight bore. Open design with a phenolic cage and high carbon chrome steel construction. Universal flush ground for mounting in pairs. Suitable for high-precision machine tool spindles and high-speed applications.
MODEL CH7210CG1DUJ74
$1,640.54 Each
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2B
1.5748 in
B (in)
0.7874
Ball Material
Ceramic
Ball material
Ceramic
Bore Type
Round
Bore type
Round
Cage Material
Phenolic
Cage material
Phenolic
Cage Type
Stratified
Cage type
Stratified
Configuration
Two
Contact angle
15 º
D (in)
3.5433
d (in)
1.9685
D1
3.0276 in
d2
2.4606 in
D4
3.2559 in
D5
2.6260 in
E (in)
0.1654
Enclosure
Open
I.D.
50 mm
Material
High carbon chrome steel
O.D.
90 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Light
r2 max
0.0433 in
r3 max
0.0236 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 | Ceramic |
Precision | ISO Class 4 |
Configuration | Two |
Preload | Light |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 1.9685 in50.000 mm |
D | 3.5433 in90.000 mm |
B | 0.7874 in20.000 mm |
2B | 1.5748 in40.000 mm |
r2 max | 0.0433 in1.100 mm |
r3 max | 0.0236 in0.600 mm |
Contact Angle | 15 |
d2 | 2.4606 in62.500 mm |
D1 | 3.0276 in76.900 mm |
D4 | 3.2559 in82.700 mm |
D5 | 2.6260 in66.700 mm |
E | 0.1654 in4.200 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.
| Brand | Bestorq |
| Model | 5600-20M-230 |
