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NTN 6306ZZNRC3 is a 63 series single-row deep groove ball bearing with a 30 mm straight bore. It features double shielded (ZZ) enclosures, a steel cage, C3 clearance, and includes a snap ring for axial location. Made from high carbon chrome steel, it is suitable for electric motors, pumps, and general rotating machinery.
MODEL 6306ZZNRC3
$19.11 Each
Prices are subject to change
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Returnable:No
a (in)
0.1291
B (in)
0.7480
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)
2.8346
d (in)
1.1811
D1
2.7091 in
D2
3.0945 in
Da max
2.5787 in
da max
1.6929 in
da min
1.4370 in
Dynamic Load Rating
6630 lbf
Dynamic load rating
6630 lbf
Enclosure
Double Shielded
f (in)
0.0669
Factor
13.3
I.D.
30 mm
Limiting Speed - Grease
10000 RPM
Limiting speed - grease
10000 RPM
Material
High carbon chrome steel
O.D.
72 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
r (in)
0.0433
r1
0.0197 in
Radial Internal Clearance
C3
Radial internal clearance
C3
ras max
0.0394 in
Static Load Rating
3350 lbf
Static load rating
3350 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 | 10000 RPM |
Precision | ISO Class 0 |
Configuration | One |
Factor | 13.3 |
Radial Internal Clearance | C3 |
Static Load Rating | 3350 lbf15000 N15.00 kN |
Dynamic Load Rating | 6000 lbf26700 N26.70 kN |
Enclosure | Double Shielded |
Weight | 0.816 lb0.370 kg |
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 | 0.7480 in19.000 mm |
D1 | 2.7091 in68.810 mm |
D2 | 3.0945 in78.600 mm |
a | 0.1291 in3.280 mm |
f | 0.0669 in1.700 mm |
r | 0.0433 in1.100 mm |
r1 | 0.0197 in0.500 mm |
da min | 1.4370 in36.500 mm |
da max | 1.6929 in43.000 mm |
Da max | 2.5787 in65.500 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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