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NTN 6309LLUNR 63 series single-row deep groove ball bearing, 45 mm straight bore, double sealed with NBR rubber contact seals, snap ring groove for axial location, stamped steel cage, pre-greased. Suitable for electric motors, pumps, fans, and general industrial rotating machinery.
MODEL 6309LLUNR
$47.95 Each
Prices are subject to change
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Typically Ships in: 1 day
Returnable:No
a (in)
0.1291
B (in)
0.9843
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
One
D (in)
3.9370
d (in)
1.7717
D1
3.8110 in
D2
4.1929 in
da max
2.4213 in
Da max
3.622 in
da min
2.0866 in
Dynamic Load Rating
13150 lbf
Dynamic load rating
13150 lbf
Enclosure
Double Sealed
f (in)
0.0969
Factor
13.1
I.D.
45 mm
Limiting Speed - Grease
4700 RPM
Limiting speed - grease
4700 RPM
Material
High carbon chrome steel
O.D.
100 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
r (in)
0.0591
r1
0.0197 in
Radial Internal Clearance
CN
Radial internal clearance
CN
ras max
0.0591 in
Seal Material
Nitrile Rubber
Seal material
Nitrile rubber
Seal Type
Contact
Seal type
Contact
Static Load Rating
7200 lbf
Static load rating
7200 lbf
Type
Deep Groove Ball Bearing
Technical Specifications
Type | Deep Groove Ball Bearing |
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | Pressed |
Cage Material | Steel |
Ball Material | Steel |
Limiting Speed - Grease | 4700 RPM |
Seal Type | Contact |
Seal Material | Nitrile Rubber |
Precision | ISO Class 0 |
Configuration | One |
Factor | 13.1 |
Radial Internal Clearance | CN |
Static Load Rating | 7200 lbf32000 N32.00 kN |
Dynamic Load Rating | 11900 lbf53000 N53.00 kN |
Enclosure | Double Sealed |
| 1.870 lb0.848 kg | |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 1.7717 in45.000 mm |
D | 3.9370 in100.000 mm |
B | 0.9843 in25.000 mm |
D1 | 3.8110 in96.800 mm |
D2 | 4.1929 in106.500 mm |
a | 0.1291 in3.280 mm |
f | 0.0969 in2.460 mm |
r | 0.0591 in1.500 mm |
r1 | 0.0197 in0.500 mm |
da min | 2.0866 in53.000 mm |
da max | 2.4213 in61.500 mm |
Da max | 3.6220 in92.000 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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