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NTN 7203CG1DUJ74 is a duplex angular contact ball bearing with a 17 mm straight bore. This high-precision universal flush ground pair features an improved geometry steel cage for reduced friction and enhanced speed capability. Designed for machine tool spindles and high-accuracy applications requiring matched preload.
MODEL 7203CG1DUJ74
$426.71 Each
Prices are subject to change
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2B
0.9449 in
B (in)
0.4724
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
15 º
D (in)
1.5748
d (in)
0.6693
D1
1.2992 in
d2
0.9488 in
D4
1.3858 in
D5
1.0433 in
E (in)
0.0965
Enclosure
Open
I.D.
17 mm
Material
High carbon chrome steel
O.D.
40 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Light
r2 max
0.0236 in
r3 max
0.0118 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 |
Precision | ISO Class 4 |
Configuration | Two |
Preload | Light |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 0.6693 in17.000 mm |
D | 1.5748 in40.000 mm |
B | 0.4724 in12.000 mm |
2B | 0.9449 in24.000 mm |
r2 max | 0.0236 in0.600 mm |
r3 max | 0.0118 in0.300 mm |
Contact Angle | 15 |
d2 | 0.9488 in24.100 mm |
D1 | 1.2992 in33.000 mm |
D4 | 1.3858 in35.200 mm |
D5 | 1.0433 in26.500 mm |
E | 0.0965 in2.450 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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