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The NTN 6305FT150 is a 63 series single-row deep groove ball bearing with a 25 mm straight bore. It features double sealed contact Viton seals for high-temperature resistance and a steel cage. Constructed from high carbon chrome steel, it is suitable for electric motors, pumps, and general rotating machinery.
MODEL 6305FT150
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$60.50 Each
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Brand Minimum Order Quantity: 2
Typically Ships in: 1 day
Returnable:No
B (in)
0.6693
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)
2.4409
d (in)
0.9843
da max
1.3780 in
Da max
2.1850 in
da min
1.2402 in
Dynamic Load Rating
5280 lbf
Dynamic load rating
5280 lbf
Enclosure
Double Sealed
Factor
12.6
I.D.
25 mm
Limiting Speed - Grease
7600 RPM
Limiting speed - grease
7600 RPM
Limiting Speed - Oil
7600 RPM
Limiting speed - oil
7600 RPM
Material
High carbon chrome steel
O.D.
62 mm
Operating Temperature Range
-40 to 300 °F
Operating temperature range
-40 to 300 ºF
Precision
ISO class 0
r (in)
0.0433
r1
0.0197 in
Radial Internal Clearance
C3
Radial internal clearance
C3
ras max
0.0394 in
Seal Material
Viton
Seal material
Viton
Seal Type
Contact
Seal type
Contact
Static Load Rating
2450 lbf
Static load rating
2450 lbf
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 | 7600 RPM |
Limiting Speed - Grease | 7600 RPM |
Seal Type | Contact |
Seal Material | Viton |
Precision | ISO Class 0 |
Configuration | One |
Factor | 12.6 |
Radial Internal Clearance | C3 |
Static Load Rating | 2450 lbf10900 N10.90 kN |
Dynamic Load Rating | 4750 lbf21200 N21.20 kN |
Enclosure | Double Sealed |
Operating Temperature Range | -40 to 300 F-40 to 150 C |
Dimensional Specifications
| |
d | 0.9843 in25.000 mm |
D | 2.4409 in62.000 mm |
B | 0.6693 in17.000 mm |
r | 0.0433 in1.100 mm |
r1 | 0.0197 in0.500 mm |
da min | 1.2402 in31.500 mm |
da max | 1.3780 in35.000 mm |
Da max | 2.1850 in55.500 mm |
ras 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.
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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