Bearing Enduro Bearings ACB 3645 Stainless Steel 1-1/8"

Enduro Bearings ACB 3645 CC SS is a 1-1/8 in internal angular-contact headset bearing with 440C stainless steel balls and races. Dimensions: 30.2 × 41 × 6.5 mm; contact angle: 36 × 45°.

Features

• The balls and races are made of 440C stainless steel for improved corrosion resistance.
• The bearing is also known by these codes: 27287-1046-004, HSS0130K, TH-873E and MR-122.
• LLB-type seals and Almagard 3752 grease help protect the bearing from water and the elements.
• Static load: 935 lbf / 4.15 kN; weight: 19.24 g.

Materials and construction

Enduro uses 440C stainless steel balls and races. Among the standard 440-series stainless alloys with high carbon content, 440C has the greatest strength, hardness and wear resistance. It is also the most expensive alloy in the series and requires special heat and cryogenic treatment to achieve its mechanical properties.

440C is slightly softer than the standard 52100 chromium steel used in most Enduro bearings, but it is a suitable alternative for wet conditions or environments where sweat or spilled sports drinks may be an issue. Enduro 440C stainless steel headset bearings are also 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 models with full 440C stainless steel races. The bearings are engineered with the largest balls possible, dual-lip seals that run in a micro-groove (labyrinth), and a 90% fill of high-pressure waterproof grease. Angular Contact (A/C) bearings are designed to keep all balls evenly engaged, spreading force over a larger surface area to minimise wear.