Bearing Enduro Bearings ACB 6806 CC Stainless Steel 1-3/8"

ACB 6806 CC SS – 1-3/8″ 440C stainless steel angular-contact headset bearing (37 × 49 × 6.5 mm; 36 × 45°).

The bearing features 440C stainless steel balls and races for high corrosion resistance. This size is also known in the bicycle industry by part number HD446K.

Materials and construction

Enduro uses only 440C stainless steel balls and races to provide long service life and corrosion resistance in demanding applications and environments. With its high carbon content, 440C has the highest strength, hardness, and wear resistance of all standard 440-series stainless steel alloys. It is also the most expensive alloy in the 440 series and requires special heat treatment and cryogenic treatment to achieve its mechanical properties.

Although 440C stainless steel is slightly softer than the standard 52100 chromium steel used in most Enduro bearings, it is an excellent alternative for wet conditions or where sweat and spilled sports drinks may be a problem. LLB-type seals and Almagard 3752 grease provide additional protection against the elements. Enduro 440C stainless steel headset bearings are used in many popular headset brands and come with a lifetime warranty.

The Enduro range of angular-contact headset bearings starts with Black Oxide-treated chromium steel races and extends to full 440C stainless steel. The bearings are engineered with the largest balls possible, feature dual-lip seals running in a micro-groove (labyrinth), and are filled to 90% with high-pressure waterproof grease to protect against sweat and the elements. Enduro Angular Contact (A/C) bearings are designed so that all balls are evenly engaged, distributing force over a larger surface area to minimize wear and maximize service life.

Technical specifications

• Static load: 917 lbf / 408 kN
• Weight: 24.9 g