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NTN 742024/GNUPU21 is a thrust ball bearing with a straight bore, open enclosure, and brass cage. Constructed from high carbon chrome steel, it is designed for axial load applications in industrial machinery.
MODEL 742024/GNUPU21
$3,911.49 Each
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Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
C (in)
1.4173
Cage Material
Brass
Cage material
Brass
Cage Type
Machined
Cage type
Machined
Configuration
Two
Contact angle
45 º
D (in)
7.0866
d (in)
4.7244
Da max
5.6299 in
da min
5.6299 in
Dynamic Load Rating
19600 lbf
Dynamic load rating
19600 lbf
Enclosure
Open
Ew
6.4961 in
I.D.
120 mm
J (in)
5.9843
Limiting Speed - Grease
2900 RPM
Limiting speed - grease
2900 RPM
Limiting Speed - Oil
3800 RPM
Limiting speed - oil
3800 RPM
Material
High carbon chrome steel
O.D.
180 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Outside Ring Type
Straight
Precision
ISO Class 5
r (in)
0.0787
r1
0.0394 in
r1as max
0.0394 in
ras max
0.0787 in
Seal material
None
Seal type
None
Static Load Rating
50000 lbf
Static load rating
50000 lbf
T1
2.3622 in
Type
Thrust Ball Bearing
Technical Specifications
Type | Thrust Ball Bearing |
|---|---|
Bore Type | Round |
Outside Ring Type | Straight |
Material | High Carbon Chrome Steel |
Cage Type | Machined |
Cage Material | Brass |
Ball Material | Steel |
Limiting Speed - Oil | 3800 RPM |
Limiting Speed - Grease | 2900 RPM |
Seal Type | None |
Seal Material | None |
Precision | ISO Class 5 |
Configuration | Two |
Static Load Rating | 50000 lbf223000 N223.00 kN |
Dynamic Load Rating | 19600 lbf87000 N87.00 kN |
Enclosure | Open |
Weight | 9.921 lb4.500 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 4.7244 in120.000 mm |
|---|---|
D | 7.0866 in180.000 mm |
C | 1.4173 in36.000 mm |
T1 | 2.3622 in60.000 mm |
J | 5.9843 in152.000 mm |
Ew | 6.4961 in165.000 mm |
r | 0.0787 in2.000 mm |
r1 | 0.0394 in1.000 mm |
Contact Angle | 45 |
da min | 5.6299 in143.000 mm |
Da max | 5.6299 in143.000 mm |
ras max | 0.0787 in2.000 mm |
r1as 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.
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