1. Product Overview The 628/8 R‑2Z miniature deep groove ball bearing is fitted with double 2Z metal dust shields, featuring compact dimension, low‑noise and stable radial load performance. It is widely used for tiny motors and compact precision devices with restricted installation space. 👉 Get a quote within 24 hours for your project 2. Technical Specifications Model: 628/8 R‑2Z Inner Diameter (ID): 8mm Outer Diameter (OD): 16mm Width: 5mm Structure: Miniature single row