A81420 THOMSON Precision Bearings Precision, Steel Ball Bushing Bearing, 0.500 in, Not Self-Aligning, Closed, Not Corrosion Resistant. - Precision Steel Ball Bushing bearings offer great improvements in efficiency, productivity, and accuracy over high-friction plain bearings flat-ways.- The all-steel design makes the bearing product line perfect for replacing plain bearings in high temperature applications.- The steel sleeve anti-friction recirculating ball bushing provides rigid low drag movement – ~100x lower drag coefficient than a plain contact bearing.- A coefficient of friction as low as .001. When replacing high friction plain bearings, Precision Steel Ball Bushing Bearings dramatically improve machine productivity and efficiency. อ่านเพิ่มเติม