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NTN 6303ZZNR 63 series single-row deep groove ball bearing with a 17 mm straight bore. Features double steel shields (ZZ) and includes a snap ring groove for axial location. Suitable for electric motors, pumps, and general rotating machinery.
MODEL 6303ZZNR
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$23.48 Each
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Brand Minimum Order Quantity: 3
Typically Ships in: 1 day
Returnable:No
a (in)
0.0969
B (in)
0.5512
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)
1.8504
d (in)
0.6693
D1
1.7559 in
D2
2.0748 in
da max
0.9843 in
Da max
1.6535 in
da min
0.8661 in
Dynamic Load Rating
3370 lbf
Dynamic load rating
3370 lbf
Enclosure
Double Shielded
f (in)
0.0441
Factor
12.2
I.D.
17 mm
Limiting Speed - Grease
16000 RPM
Limiting speed - grease
16000 RPM
Material
High carbon chrome steel
O.D.
47 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
r (in)
0.0394
r1
0.0197 in
Radial Internal Clearance
CN
Radial internal clearance
CN
ras max
0.0394 in
Static Load Rating
1470 lbf
Static load rating
1470 lbf
Type
Deep Groove Ball Bearing
Width
14 mm
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 | 16000 RPM |
Precision | ISO Class 0 |
Configuration | One |
Factor | 12.2 |
Radial Internal Clearance | CN |
Static Load Rating | 1470 lbf6550 N6.55 kN |
Dynamic Load Rating | 3050 lbf13500 N13.50 kN |
Enclosure | Double Shielded |
| 0.258 lb0.117 kg | |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 0.6693 in17.000 mm |
D | 1.8504 in47.000 mm |
B | 0.5512 in14.000 mm |
D1 | 1.7559 in44.600 mm |
D2 | 2.0748 in52.700 mm |
a | 0.0969 in2.460 mm |
f | 0.0441 in1.120 mm |
r | 0.0394 in1.000 mm |
r1 | 0.0197 in0.500 mm |
da min | 0.8661 in22.000 mm |
da max | 0.9843 in25.000 mm |
Da max | 1.6535 in42.000 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.
#1494908
Brand
Koyo Bearing
Model
6303 ZZNR
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