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NTN 6221NR is a 62 series single-row deep groove ball bearing with a 105 mm straight bore. It is an open type bearing with a snap ring groove and snap ring included. Designed for general industrial rotating equipment such as electric motors, pumps, and fans.
MODEL 6221NR
$456.49 Each
Prices are subject to change
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Returnable:No
a (in)
0.2240
B (in)
1.4173
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)
7.4803
d (in)
4.1339
D1
7.2299 in
D2
7.9882 in
Da max
7.0472 in
da max
4.9213 in
da min
4.5669 in
Dynamic Load Rating
33040 lbf
Dynamic load rating
33040 lbf
Enclosure
Open
f (in)
0.1220
Factor
14.4
I.D.
105 mm
Limiting Speed - Grease
3500 RPM
Limiting speed - grease
3500 RPM
Limiting Speed - Oil
4200 RPM
Limiting speed - oil
4200 RPM
Material
High carbon chrome steel
O.D.
190 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
r (in)
0.0827
r1
0.0197 in
Radial Internal Clearance
CN
Radial internal clearance
CN
ras max
0.0787 in
Static Load Rating
23600 lbf
Static load rating
23600 lbf
Style
Radial ball bearing
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 - Oil | 4200 RPM |
Limiting Speed - Grease | 3500 RPM |
Precision | ISO Class 0 |
Configuration | One |
Factor | 14.4 |
Radial Internal Clearance | CN |
Static Load Rating | 23600 lbf105000 N105.00 kN |
Dynamic Load Rating | 29900 lbf133000 N133.00 kN |
Enclosure | Open |
Weight | 8.356 lb3.790 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 4.1339 in105.000 mm |
D | 7.4803 in190.000 mm |
B | 1.4173 in36.000 mm |
D1 | 7.2299 in183.640 mm |
D2 | 7.9882 in202.900 mm |
a | 0.2240 in5.690 mm |
f | 0.1220 in3.100 mm |
r | 0.0827 in2.100 mm |
r1 | 0.0197 in0.500 mm |
da min | 4.5669 in116.000 mm |
da max | 4.9213 in125.000 mm |
Da max | 7.0472 in179.000 mm |
ras max | 0.0787 in2.000 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 are the dimensions and typical uses of a 6200 series ball bearing?
A standard 6200 ball bearing has: • 10 mm bore • 30 mm outer diameter • 9 mm width The 6200 series sits within the deep groove ball bearing family and is designed for light to moderate loads at relatively high speeds. You’ll typically find them in electric motors, small gearboxes, pumps, and general industrial equipment. They’re popular because they’re compact, widely available, and cost effective. Different variants exist such as sealed, shielded, or high clearance versions, depending on the application.
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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