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NTN 5306C3 double-row angular contact ball bearing with 30 mm straight bore, open enclosure, steel cage, and C3 radial internal clearance. High carbon chrome steel construction supports combined radial and axial loads in both directions. Suitable for pumps, compressors, gearboxes, and general industrial machinery requiring moderate thrust capacity.
MODEL 5306C3
$97.43 Each
Prices are subject to change
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Returnable:No
a (in)
1.6929
B (in)
1.1890
Ball Material
Through Hardened Steel
Ball material
Through hardened 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)
2.8346
d (in)
1.1811
Da max
2.5591 in
da min
1.4567 in
Dynamic Load Rating
9100 lbf
Dynamic load rating
9100 lbf
Enclosure
Open
I.D.
30 mm
Limiting Speed - Grease
6300 RPM
Limiting speed - grease
6300 RPM
Limiting Speed - Oil
8500 RPM
Limiting speed - oil
8500 RPM
Material
High carbon chrome steel
O.D.
72 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Outside Ring Type
Straight
Precision
Class 0
r (in)
0.0433
Radial Internal Clearance
C3
Radial internal clearance
C3
ras max
0.0394 in
Static Load Rating
6300 lbf
Static load rating
6300 lbf
Type
Angular Contact Ball Bearing
Width
30.2 mm
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 | Through Hardened Steel |
Limiting Speed - Oil | 8500 RPM |
Limiting Speed - Grease | 6300 RPM |
Precision | Class 0 |
Configuration | Two |
Radial Internal Clearance | C3 |
Static Load Rating | 6300 lbf28100 N28.10 kN |
Dynamic Load Rating | 9100 lbf40500 N40.50 kN |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 1.1811 in30.000 mm |
D | 2.8346 in72.000 mm |
B | 1.1890 in30.200 mm |
r | 0.0433 in1.100 mm |
Contact Angle | 25 |
a | 1.6929 in43.000 mm |
da min | 1.4567 in37.000 mm |
Da max | 2.5591 in65.000 mm |
ras max | 0.0394 in1.000 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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