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NTN 71917HVDUJ74 is a high-precision duplex angular contact ball bearing with an 85 mm straight bore. It features a phenolic cage and is open (unsealed). The universal flush ground design allows for mounting in any arrangement. Suitable for high-speed machine tool spindles and precision applications.
MODEL 71917HVDUJ74
$1,933.13 Each
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2B
1.4173 in
B (in)
0.7087
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Phenolic
Cage material
Phenolic
Cage Type
Stratified
Cage type
Stratified
Configuration
Two
Contact angle
25 º
d (in)
3.3465
D (in)
4.7244
D1
4.3307 in
d2
3.7402 in
D4
4.4882 in
D5
3.8819 in
E (in)
0.0709
Enclosure
Open
I.D.
85 mm
Material
High carbon chrome steel
O.D.
120 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
Preload
Light
r2 max
0.0433 in
r3 max
0.0236 in
Type
Angular Contact Ball Bearing
Width
36 mm
Technical Specifications
| Type | Angular Contact Ball Bearing |
|---|---|
| Bore Type | Round |
| Material | High Carbon Chrome Steel |
| Cage Type | Stratified |
| Cage Material | Phenolic |
| Ball Material | Steel |
| Precision | ISO Class 4 |
| Configuration | Two |
| Preload | Light |
| Enclosure | Open |
| Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
| d | 3.3465 in85.000 mm |
|---|---|
| D | 4.7244 in120.000 mm |
| B | 0.7087 in18.000 mm |
| 2B | 1.4173 in36.000 mm |
| r2 max | 0.0433 in1.100 mm |
| r3 max | 0.0236 in0.600 mm |
| Contact Angle | 25 |
| d2 | 3.7402 in95.000 mm |
| D1 | 4.3307 in110.000 mm |
| D4 | 4.4882 in114.000 mm |
| D5 | 3.8819 in98.600 mm |
| E | 0.0709 in1.800 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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