6311ZENR Nachi Bearing Shield C3 Snap Ring Japan 55x120x29 Bearing6311ZENR Nachi Bearing With Snap Ring and Shield Made in Japan 6311ZENR Nachi Bearing With Snap Ring and Shield, the 6311ZENR inner diameter is 55mm, the 6311ZENR outer diameter is 120mm, 6311ZENR width is 29mm. 6311ZENR Nachi Ball Bearing Nachi Deep groove Ball Bearing Closures: Double metal shields (ZZ) for added protection ZNR ZZNR 2ZNR Clearance: C3 (increased internal clearance for higher speed or thermal expansion) Dimensions: 55mm x 120mm x