ACB 6806 CC BO - 1-3/8 Black Oxide Coated Angular Contact Headset Bearing

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ACB 6806 CC BO - 1-3/8 Angular Contact Black Oxide treated Headset Bearing (37mm x 49mm x 6.5mm; 36 x 45deg), Angular-contact headset bearing featuring anti-corrosion Black Oxide/Magnetite coated 52100 High-Carbon Chromium alloy races paired with grade 10 Balls. Black Oxide coating provides an extra level of corrosion resistance and extended worry-free performance. This size bearing is also known in the bike Industry by part number:, HD 1446K. The Enduro line of angular-contact headset bearings start with Black Oxide treated Chromium Steel races, steps up to full 440C stainless steel, and the top of the line is, lifetime-guaranteed, XD15 aerospace-stainless (races and balls). They are always engineered with the largest balls possible, feature dual-lip seals riding in a micro-groove (labyrinth) and are filled 90% with high pressure water proof grease for the ultimate protection against sweat and the elements. Enduro Angular Contact (A/C) bearings are designed so all balls are evenly engaged to spread the force over a larger surface area, minimizing wear and maximizing life.