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Make sure this fits by entering your model number. BUILT TO LAST -- Advanced heat treatment process for strength PREMIUM MATERIALS -- Precision manufactured using premium-grade steel for lasting performance and extended bearing life RELIABLE PERFORMANCE -- Element size and quantity are engineered to meet or exceed the load rating of OE bearings COMPREHENSIVE COVERAGE -- Industry-leading coverage for domestic and import applications RIGOROUS TESTING -- Comprehensive testing throughout design and development processes by National engineers for quality you can count on 
National 305-L Ball Bearing
$40.24 $104.97
Brand National Bearings Material Alloy Steel Item Dimensions LxWxH 3.19 x 3.19 x 0.88 inches Item Weight 5 Pounds Bearing Number 305...
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| Brand | National Bearings |
| Material | Alloy Steel |
| Item Dimensions LxWxH | 3.19 x 3.19 x 0.88 inches |
| Item Weight | 5 Pounds |
| Bearing Number | 305 L |
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NATIONAL BALL BEARINGS
Premium-quality bearings from National are manufactured to exacting standards to deliver lasting performance and extended bearing life. Prone to wear and tear, bearings can wear out over time. When you have to replace a bearing in your vehicle, choose National.
Advanced heat treatment process for strength
Precision manufactured using premium-grade steel for lasting performance and extended bearing life
Element size and quantity are engineered to meet or exceed the load rating of OE bearings
SureSignal technology (where applicable) features magnetic encoders on both sides of the bearing to eliminate installation error
WHAT ARE BEARINGS?
Used to reduce friction and support loads, bearings are key to the smooth operation of your vehicle. Bearings can be found on many different parts of your car such as:
Properly pressing a bearing in place will help prevent damage to rolling elements. Be sure all components are free of dirt and corrosion and only apply force to the bearing race you are installing. Avoid transferring pressure through the rolling elements or tapping directly on the race of the bearing; doing either of these can damage the bearing. Place a sleeve between the bearing race you are installing and tap evenly in place.
When inspecting the bearings, be sure to examine the assembly before starting a repair. Don’t find one bad bearing and stop your inspection – other failed bearings or out of balance components can lead to premature bearing failure. Once you have looked at entire system, you can be confident that you’re doing a complete repair.
If you can’t remember the last time you checked the bearings on your trailer, it’s time to inspect them. Whether you have a travel trailer, boat trailer or utility trailer, checking the bearings is an important step that should be taken at the beginning of each season. Check the trailer wheels for looseness, noise and heat. Excessive amounts of wheel looseness, noise or heat is an indication that the bearings should be serviced or replaced.
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