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NTN BNT006/GNP4 single-row angular contact ball bearing with a 30 mm straight bore. P4 precision class for high-speed, high-accuracy machine tool spindles, motors, and lathes. Open design for oil or grease lubrication.
MODEL BNT006/GNP4
$407.95 Each
Prices are subject to change
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Returnable:No
a (in)
0.4843
B (in)
0.5118
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Phenolic Resin
Cage material
Phenolic resin
Cage Type
Machined
Cage type
Machined
Configuration
One
Contact angle
15 º
D (in)
2.1654
d (in)
1.1811
D1
1.8819 in
d1
1.5118 in
d2
1.3976 in
Da max
1.9488 in
da min
1.3976 in
db min
1.3583 in
Double Row Width
1.0236 in
Dynamic Load Rating
2610 lbf
Dynamic load rating
2610 lbf
Enclosure
Open
Factor
9.8
I.D.
30 mm
Limiting Speed - Grease
25100 RPM
Limiting speed - grease
25100 RPM
Limiting Speed - Oil
50000 RPM
Limiting speed - oil
50000 RPM
Material
High carbon chrome steel
O.D.
55 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Normal
Quadruple Row Width
2.0472 in
r (in)
0.0394
r1
0.0236 in
r1as max
0.0236 in
ras max
0.0394 in
Static Load Rating
1520 lbf
Static load rating
1520 lbf
Triple Row Width
1.5354 in
Type
Main Spindle Bearing
Technical Specifications
| Type | Main Spindle Bearing |
|---|---|
| Bore Type | Round |
| Material | High Carbon Chrome Steel |
| Cage Type | Machined |
| Cage Material | Phenolic Resin |
| Ball Material | Steel |
| Limiting Speed - Oil | 50000 RPM |
| Limiting Speed - Grease | 25100 RPM |
| Precision | ISO Class 4 |
| Configuration | One |
| Preload | Normal |
| Factor | 9.8 |
| Static Load Rating | 1520 lbf6750 N6.75 kN |
| Dynamic Load Rating | 2610 lbf11600 N11.60 kN |
| Enclosure | Open |
| Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
| d | 1.1811 in30.000 mm |
|---|---|
| D | 2.1654 in55.000 mm |
| B | 0.5118 in13.000 mm |
| d1 | 1.5118 in38.400 mm |
| d2 | 1.3976 in35.500 mm |
| D1 | 1.8819 in47.800 mm |
| r | 0.0394 in1.000 mm |
| r1 | 0.0236 in0.600 mm |
| Contact Angle | 15 |
| a | 0.4843 in12.500 mm |
| da min | 1.3976 in35.500 mm |
| db min | 1.3583 in34.500 mm |
| Da max | 1.9488 in49.500 mm |
| ras max | 0.0394 in1.000 mm |
| r1as max | 0.0236 in0.600 mm |
| Double Row Width | 1.0236 in26.000 mm |
| Triple Row Width | 1.5354 in39.000 mm |
| Quadruple Row Width | 2.0472 in52.000 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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