Precision Ball Bearings
Friction, or resistance to motion, is the result of the force acting between two surfaces as they slide against each other. Bearings reduce friction and provide smooth sliding contact between surfaces due to their material, shape or lubrication. Choosing the correct bearing for an application improves efficiency, extends bearing life at high speeds and avoids overheating. Bearings fall into two general categories: radial bearings that support rotating shafts and thrust bearings that support axial loads. Four classifications of bearing tolerances have been established, providing standards of precision for the correct application of ball bearings.
![0.787 Inch | 20 Millimeter x 1.85 Inch | 47 Millimeter x 2.205 Inch | 56 Millimeter TIMKEN 2MM204WI QUM Precision Ball Bearings](https://m.adam-gerich.de/uploaded_images/d63747-0-787-inch-20-millimeter-x-1-85-inch-47-millimeter-x-2-205-inch-56-millimeter-timken-2mm204wi-qum-precision-ball-bearings.jpg)
![0.787 Inch | 20 Millimeter x 1.85 Inch | 47 Millimeter x 2.205 Inch | 56 Millimeter TIMKEN 2MM204WI QUL Precision Ball Bearings](https://m.adam-gerich.de/uploaded_images/d63749-0-787-inch-20-millimeter-x-1-85-inch-47-millimeter-x-2-205-inch-56-millimeter-timken-2mm204wi-qul-precision-ball-bearings.jpg)
![0.787 Inch | 20 Millimeter x 1.85 Inch | 47 Millimeter x 2.205 Inch | 56 Millimeter TIMKEN 2MM204WI QUH Precision Ball Bearings](https://m.adam-gerich.de/uploaded_images/d63754-0-787-inch-20-millimeter-x-1-85-inch-47-millimeter-x-2-205-inch-56-millimeter-timken-2mm204wi-quh-precision-ball-bearings.jpg)
![2.953 Inch | 75 Millimeter x 5.118 Inch | 130 Millimeter x 2.953 Inch | 75 Millimeter TIMKEN 2MM215WI TUL Precision Ball Bearings](https://m.adam-gerich.de/uploaded_images/d63745-2-953-inch-75-millimeter-x-5-118-inch-130-millimeter-x-2-953-inch-75-millimeter-timken-2mm215wi-tul-precision-ball-bearings.jpg)
![2.953 Inch | 75 Millimeter x 5.118 Inch | 130 Millimeter x 3.937 Inch | 100 Millimeter TIMKEN 2MM215WI QUH Precision Ball Bearings](https://m.adam-gerich.de/uploaded_images/d63746-2-953-inch-75-millimeter-x-5-118-inch-130-millimeter-x-3-937-inch-100-millimeter-timken-2mm215wi-quh-precision-ball-bearings.jpg)
![9.449 Inch | 240 Millimeter x 14.173 Inch | 360 Millimeter x 4.409 Inch | 112 Millimeter SKF 7048 ACD/P4ADGA Precision Ball Bearings](https://m.adam-gerich.de/uploaded_images/d63748-9-449-inch-240-millimeter-x-14-173-inch-360-millimeter-x-4-409-inch-112-millimeter-skf-7048-acd-p4adga-precision-ball-bearings.jpg)
![3.15 Inch | 80 Millimeter x 5.512 Inch | 140 Millimeter x 2.047 Inch | 52 Millimeter TIMKEN 2MM216WI DUM FS545 Precision Ball Bearings](https://m.adam-gerich.de/uploaded_images/d63754-3-15-inch-80-millimeter-x-5-512-inch-140-millimeter-x-2-047-inch-52-millimeter-timken-2mm216wi-dum-fs545-precision-ball-bearings.jpg)