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NTN 7209CG1UJ84 is a single-row angular contact ball bearing with a 45 mm straight bore. Open design with a phenolic cage and high carbon chrome steel construction. Suitable for high-speed and high-precision applications such as machine tool spindles and pumps.
MODEL 7209CG1UJ84
$405.78 Each
Prices are subject to change
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a (Load Center)
0.7087 in
B (in)
0.7480
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
15 º
D (in)
3.3465
d (in)
1.7717
D1
2.8543 in
d2
2.2598 in
D4
3.0512 in
D5
0.1693 in
Double Row Width
1.4961 in
Dynamic Load Rating
10328 lbf
Dynamic load rating
10328 lbf
E (in)
4.300
Enclosure
Open
I.D.
45 mm
Limiting Speed - Grease
16500 RPM
Limiting speed - grease
16500 RPM
Limiting Speed - Oil
26000 RPM
Limiting speed - oil
26000 RPM
Material
High carbon chrome steel
O.D.
85 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Medium
Quadruple Row Width
2.9921 in
r2 max
0.0433 in
r3 max
0.0236 in
Static Load Rating
6728 lbf
Static load rating
6728 lbf
Triple Row Width
2.2441 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 | 26000 RPM |
Limiting Speed - Grease | 16500 RPM |
Precision | ISO Class 4 |
Configuration | One |
Preload | Medium |
Static Load Rating | 6728 lbf29900 N29.90 kN |
Dynamic Load Rating | 10328 lbf46000 N46.00 kN |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 1.7717 in45.000 mm |
|---|---|
D | 3.3465 in85.000 mm |
B | 0.7480 in19.000 mm |
r2 max | 0.0433 in1.100 mm |
r3 max | 0.0236 in0.600 mm |
Contact Angle | 15 |
a (Load Center) | 0.7087 in18.000 mm |
d2 | 2.2598 in57.400 mm |
D1 | 2.8543 in72.500 mm |
D4 | 3.0512 in77.500 mm |
D5 | 0.1693 in2.4291 mm |
E | 4.300 in61.700 mm |
Double Row Width | 1.4961 in38.000 mm |
Triple Row Width | 2.2441 in57.000 mm |
Quadruple Row Width | 2.9921 in76.000 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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