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NTN 7209CT1GD2/GNP4 is a duplex angular contact ball bearing with a 45 mm straight bore. This open bearing features a phenolic cage and is ground for universal flush mounting. Constructed from high carbon chrome steel, it is designed for high-precision applications requiring matched bearing sets.
MODEL 7209CT1GD2/GNP4
$811.08 Each
Prices are subject to change
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Returnable:No
2B
1.4961 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
Two
Contact angle
15 º
d (in)
1.7717
D (in)
3.3465
D1
2.8543 in
d1
2.2559 in
D2
3.0748 in
Da max
3.0709 in
da min
2.0472 in
Db max
3.1693 in
db min
1.9488 in
Dynamic Load Rating
15000 lbf
Dynamic load rating
15000 lbf
Enclosure
Open
I.D.
45 mm
Limiting Speed - Grease
10000 RPM
Limiting speed - grease
10000 RPM
Limiting Speed - Oil
13000 RPM
Limiting speed - oil
13000 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
Normal
r (in)
0.0433
r1
0.0236 in
r1as max
0.0236 in
ras max
0.0394 in
Static Load Rating
12900 lbf
Static load rating
12900 lbf
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 |
13000 RPM |
Limiting Speed - Grease |
10000 RPM |
Precision |
ISO Class 4 |
Configuration |
Two |
Preload |
Normal |
Static Load Rating |
12900 lbf57500 N57.50 kN |
Dynamic Load Rating |
15000 lbf66500 N66.50 kN |
Enclosure |
Open |
Weight |
1.759 lb0.798 kg |
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 |
2B |
1.4961 in38.000 mm |
d1 |
2.2559 in57.300 mm |
D1 |
2.8543 in72.500 mm |
D2 |
3.0748 in78.100 mm |
r |
0.0433 in1.100 mm |
r1 |
0.0236 in0.600 mm |
Contact Angle |
15 |
da min |
2.0472 in52.000 mm |
db min |
1.9488 in49.500 mm |
Da max |
3.0709 in78.000 mm |
Db max |
3.1693 in80.500 mm |
ras max |
0.0394 in1.000 mm |
r1as max |
0.0236 in0.600 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.