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The NTN 2308KC3 is a 23 series self-aligning ball bearing with a 40 mm straight bore. It features an open design, steel cage, and C3 clearance. This bearing accommodates misalignment and is suitable for applications such as fans, blowers, and textile machinery.
MODEL 2308KC3
$234.50 Each
Prices are subject to change
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Returnable: See conditions
B (in)
1.2992
Ball material
Steel
Ball Material
Steel
Bore type
Tapered
Bore Type
Tapered
Cage material
Steel
Cage Material
Steel
Cage type
Pressed
Cage Type
Pressed
Configuration
One
D (in)
3.5433
d (in)
1.5748
Da max
3.2283 in
da min
1.8898 in
Dynamic load rating
10200 lbf
Dynamic Load Rating
10200 lbf
Enclosure
Open
I.D.
40 mm
Limiting speed - grease
6300 RPM
Limiting Speed - Grease
6300 RPM
Limiting speed - oil
8000 RPM
Limiting Speed - Oil
8000 RPM
Material
High Carbon Chrome Steel
O.D.
90 mm
Operating temperature range
-40 to 250 ºF
Operating Temperature Range
-40 to 250 °F
Precision
Class 0
r (in)
0.0591
Radial internal clearance
C3
Radial Internal Clearance
C3
ras max
0.0591 in
Seal material
None
Seal type
None
Static load rating
3050 lbf
Static Load Rating
3050 lbf
Type
Self Aligning Ball Bearing
Width
33 mm
Y0
1.50
Y1
1.50
Y2
2.30
Technical Specifications
Type | Self Aligning Ball Bearing |
Bore Type | Tapered |
Material | High Carbon Chrome Steel |
Cage Type | Pressed |
Cage Material | Steel |
Ball Material | Steel |
Limiting Speed - Oil | 8000 RPM |
Limiting Speed - Grease | 6300 RPM |
Y1 | 1.50 |
Y2 | 2.30 |
Y0 | 1.50 |
Seal Type | None |
Seal Material | None |
Precision | Class 0 |
Configuration | One |
Radial Internal Clearance | C3 |
Static Load Rating | 3050 lbf13500 N13.50 kN |
Dynamic Load Rating | 10200 lbf45500 N45.50 kN |
Enclosure | Open |
Weight | 1.969 lb0.893 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
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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