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NTN 742030/GNUPU21 is a double direction angular contact thrust ball bearing with a straight bore. It features an open enclosure and a brass cage, constructed from high carbon chrome steel. This bearing is designed for heavy-duty axial load applications in industrial machinery.
MODEL 742030/GNUPU21
$6,599.16 Each
Prices are subject to change
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Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
C (in)
1.7717
Cage Material
Brass
Cage material
Brass
Cage Type
Machined
Cage type
Machined
Configuration
Two
Contact angle
45 º
d (in)
5.9055
D (in)
8.8583
Da max
7.0079 in
da min
7.0079 in
Dynamic Load Rating
29900 lbf
Dynamic load rating
29900 lbf
Enclosure
Open
Ew
8.0709 in
I.D.
150 mm
J (in)
7.4409
Limiting Speed - Grease
2300 RPM
Limiting speed - grease
2300 RPM
Limiting Speed - Oil
3000 RPM
Limiting speed - oil
3000 RPM
Material
High carbon chrome steel
O.D.
225 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Outside Ring Type
Straight
Precision
Special precision
r (in)
0.0827
r1
0.0433 in
r1as max
0.0394 in
ras max
0.0787 in
Seal material
None
Seal type
None
Static Load Rating
81000 lbf
Static load rating
81000 lbf
T1
2.9528 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 | 3000 RPM |
Limiting Speed - Grease | 2300 RPM |
Seal Type | None |
Seal Material | None |
Precision | Special Precision |
Configuration | Two |
Static Load Rating | 81000 lbf360000 N360.00 kN |
Dynamic Load Rating | 29900 lbf133000 N133.00 kN |
Enclosure | Open |
Weight | 19.775 lb8.970 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 5.9055 in150.000 mm |
D | 8.8583 in225.000 mm |
C | 1.7717 in45.000 mm |
T1 | 2.9528 in75.000 mm |
J | 7.4409 in189.000 mm |
Ew | 8.0709 in205.000 mm |
r | 0.0827 in2.100 mm |
r1 | 0.0433 in1.100 mm |
Contact Angle | 45 |
da min | 7.0079 in178.000 mm |
Da max | 7.0079 in178.000 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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