10 Pcs Deep Groove Ball Bearings Deep Groove Bearings Skating Mechanical Transmission Bearings 17mm x 40mm x 12mm

Size: 17mm inner diameter, 40mm outer diameter, 12mm width, deep groove ball bearing. Material: bearing steel, durability and resistance to deformity under heavy loads.Rust and corrosion resistant,washable. Hardness 60-62°, high speed, low noise, high precision. Closed with metal shields to protect the bearing from dust or any possible contamination. Applicable to: all kinds of mechanical transmission, supporting motors, precision instruments, telecommunications equipment doors and windows pulleys, fitness equipment, toy car models, skateboard roller skating, fishing gear, aircraft model equipment, sewing machinery, household appliances, medical equipment, etc.