Enduro ACB 3645 CC BO - 1-1/8 BO Coated Angular Contact Headset Bearing

Enduro ACB 3645 CC BO - 1-1/8 BO Coated Angular Contact Headset Bearing

ACB 3645 CC BO 1-1/8 Angular Contact Black Oxide treated Headset bearing (30.2mm x 41mm x 6.5mm: 36x45 deg)

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 these part numbers:

• 27287-1046-004
• HSS0130K
• TH-873E
• MR-122

The Black Oxide headset bearings are treated in multiple chemical baths to achieve a 3 micron anti corrosive depth. This process also provides a secondary advantage of heat treatment making them tougher. The BO races then go through a secondary "super grind” polishing the rolling surface mirror smooth. Both Stainless and BO bearings are engineered with the largest balls possible, feature dual-lip seals riding in a micro-groove (labyrinth) and are filled 90% with extra high pressure Almagard 3752 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.

• Static load - 935lbf / 4.15kN
• Weight - 19.24g