S1628-2RS Bearing Stainless Steel Sealed 5/8" x 1-5/8" x 1/2" Bearing Inner Diameter - 41.275mm the N315EG inner diameter is

the N315EG inner diameter is 75mm

UC207-20 Bearing

bearing is Seals on Both Sides

Balls: Si3N4

6312ZZE Nachi Ball Bearing

S1628-2RS Bearing Stainless Steel Sealed 5/8" x 1-5/8" x 1/2" Bearing Inner Diameter - 41.275mm the N315EG inner diameter isS1628 2RS Stainless Steel Sealed Ball Bearing 5 8" x 1 5 8" x 1 2" inch S1628 2RS Stainless Steel Sealed Ball Bearing, Made of stainless steel with Stainless Steel balls and steel cage, S1628 2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, bearing is sealed and self lubricated,the quality is set to EMQ (electric motor quality) to ensure high speed, S1628 2RS bearing is lubricated with grease.