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NTN 5308C3 double-row angular contact ball bearing with 40 mm straight bore, open enclosure, and steel cage. C3 internal clearance accommodates thermal expansion. High carbon chrome steel construction for radial and axial load capacity in pumps, compressors, and gearboxes.
MODEL 5308C3
$104.48 Each
Prices are subject to change
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Returnable:No
a (in)
2.1063
B (in)
1.4370
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Steel
Cage material
Steel
Cage Type
Pressed
Cage type
Pressed
Configuration
Two
Contact angle
25 º
D (in)
3.5433
d (in)
1.5748
Da max
3.1890 in
da min
1.9291 in
Dynamic Load Rating
12700 lbf
Dynamic load rating
12700 lbf
Enclosure
Open
I.D.
40 mm
Limiting Speed - Grease
5300 RPM
Limiting speed - grease
5300 RPM
Limiting Speed - Oil
6700 RPM
Limiting speed - oil
6700 RPM
Material
High carbon chrome steel
O.D.
90 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Outside Ring Type
Straight
Precision
Class 0
r (in)
0.0591
Radial Internal Clearance
C3
Radial internal clearance
C3
ras max
0.0591 in
Static Load Rating
9200 lbf
Static load rating
9200 lbf
Type
Angular Contact Ball Bearing
Technical Specifications
| Type | Angular Contact Ball Bearing |
|---|---|
| Bore Type | Round |
| Outside Ring Type | Straight |
| Material | High Carbon Chrome Steel |
| Cage Type | Pressed |
| Cage Material | Steel |
| Ball Material | Steel |
| Limiting Speed - Oil | 6700 RPM |
| Limiting Speed - Grease | 5300 RPM |
| Precision | Class 0 |
| Configuration | Two |
| Radial Internal Clearance | C3 |
| Static Load Rating | 9200 lbf41000 N41.00 kN |
| Dynamic Load Rating | 12700 lbf56500 N56.50 kN |
| Enclosure | Open |
| Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
| d | 1.5748 in40.000 mm |
|---|---|
| D | 3.5433 in90.000 mm |
| B | 1.4370 in36.500 mm |
| r | 0.0591 in1.500 mm |
| Contact Angle | 25 |
| a | 2.1063 in53.500 mm |
| da min | 1.9291 in49.000 mm |
| Da max | 3.1890 in81.000 mm |
| ras max | 0.0591 in1.500 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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