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NTN 6303EX8T2XLLVA-B#01 63 series single-row deep groove ball bearing with a 17 mm straight bore. Features double contact polyacrylic seals and a polyamide cage. Designed for general industrial rotating equipment such as electric motors, pumps, and fans.
MODEL 6303EX8T2XLLVA-B#01
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$32.35 Each
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Brand Minimum Order Quantity: 3
Typically Ships in: 1 day
Returnable:No
B (in)
0.5512
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Nylon
Cage material
Nylon
Cage Type
Molded
Cage type
Molded
Clearance
CN
D (in)
1.8504
d (in)
0.6693
da max
0.9843 in
Da max
1.6535 in
da min
0.8661 in
Dynamic Load Rating
3035 lbf
Dynamic load rating
3035 lbf
Enclosure
Double Sealed
Factor
12.2
I.D.
17 mm
Limiting Speed - Grease
21000 RPM
Limiting speed - grease
21000 RPM
Material
High carbon chrome steel
O.D.
47 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
r (in)
0.0394
r1
0.0197 in
Radial Internal Clearance
Special
Radial internal clearance
Special
ras max
0.0394 in
Seal Material
Polyacrylic
Seal material
Polyacrylic
Seal Type
Contact
Seal type
Contact
Static Load Rating
1470 lbf
Static load rating
1470 lbf
Type
Deep Groove Ball Bearing
Width
14 mm
Specifications
| Bearing Data Sheet | ||
|---|---|---|
| Single Row Deep Groove Ball Bearings | ||
| NTN Part Number | 6303 | |
| Weight | N/A (lbs) / N/A (kg) | |
| Dimensions | Features/Options | ||||
|---|---|---|---|---|---|
| Dimension | Imperial | Metric | Option | Code | Description |
|
Bore d O.D.D. Width B or W rs min D1 max a max b min ro max rns min D2 max f max da min da max Da max ras max Dx min Cy max Cz min rnas max |
0.6693 (in) 1.8504 (in) 0.5512 (in) 0.0394 (in) 1.7559 (in) 0.0969 (in) 0.0532 (in) 0.0157 (in) 0.0197 (in) 2.0748 (in) 0.0441 (in) 0.8661 (in) 0.9843 (in) 1.6535 (in) 0.0394 (in) 2.1063 (in) 0.1299 (in) 0.0472 (in) 0.0197 (in) |
17.000 (mm) 47.000 (mm) 14.000 (mm) 1.000 (mm) 44.600 (mm) 2.460 (mm) 1.350 (mm) 0.400 (mm) 0.500 (mm) 52.700 (mm) 1.120 (mm) 22.000 (mm) 25.000 (mm) 42.000 (mm) 1.000 (mm) 53.500 (mm) 3.300 (mm) 1.200 (mm) 0.500 (mm) |
Series Cage |
63 |
Single Row Radial Ball Bearing 63 Series Pressed steel cage |
| Basic Load Ratings | Limiting Speeds | ||||
|---|---|---|---|---|---|
| Static Dynamic |
1,470 (LBF) 3,050 (LBF) |
6,550 (N) 13,500 (N) |
Oil Seals Grease |
19,000.00 (RPM) N/A 16,000.00 (RPM) |
|
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.
| Brand | NTN Bearing |
| Model | 6203LLUAX13V42 |