1. Product Overview 28TM11 is a TM series special deep groove ball bearing sized 28mm bore × 58mm outer diameter × 16mm width, matched for automobile and agricultural machinery gearbox auxiliary shafts. Double-sided reinforced rubber contact seals block fine dust and prevent internal gear oil leakage. Standard C0 internal clearance, deep groove raceway bears radial load and bidirectional light axial load, runs smoothly and quietly under long-term high-speed shifting vibration