Bearing NO.       d              D             B RMS4               12.7         41.28      15.88 RMS5               15.875     46.04      15.88 RMS6               19.05       50.8        17.46 RMS7               22.225     57.15      17.46 RMS8               25.4         63.5        19.05 RMS9               28.575     71.44      20.64 RMS10             31.75       79.37      22.23 RMS11             34. 925    88.9        22.23 RMS12             38.1         95.25      22.81 RMS13             41.275     101.0      23.81 RMS14             44.45       108        26.99 RMS15             47.625     114.3      26.99 RMS16             50.8         114.3      26.99 RMS18             57.15       127        31.75 RMS20             63.5         139.5     31.75 RMS22             69.85       158.8     34.93 RMS15-2RS Nonstandard Deep Groove Ball Bearings Features: 1. High quality through hardened bearing steel used for basic construction. 2. Optimized raceway geometry and super finishing. 3. High precision accuracy and manufacturing consistency. 4. Proprietary high performance sealing options. 5. Premium grease as lubrication system. RMS15-2RS Nonstandard Deep Groove Ball Bearings Working Advantages: 1. Improved bearing life reliability. 2. Reduced friction, vibration and noise during operation. 3. 100% vibration/noise testing for fractional HP to high HP electrical applications. 4. Globally interchangeable for use in existing applications.