Bearing Enduro Bearings ACB 3645 3748 Black Oxide -1-3/8"

Enduro Bearings ACB 3645 3748 BO angular-contact headset bearing for a 1-3/8" headset. Dimensions: 37 mm × 48 mm × 6.5 mm; contact angles: 36° and 45°.

Features

• 52100 high-carbon chromium alloy races with an anti-corrosion Black Oxide (magnetite) coating, paired with Grade 10 balls.
• The Black Oxide coating adds corrosion resistance. It is produced through multiple chemical baths to achieve an anti-corrosive depth of 3 microns. The process also provides additional heat treatment, making the races tougher.
• The race rolling surfaces undergo a secondary “super grind” polishing process to achieve a mirror-smooth finish.
• The Enduro angular-contact headset bearing line starts with Black Oxide-treated chromium steel races and also includes full 440C stainless steel races.
• Both the stainless steel and Black Oxide bearings are engineered to accommodate the largest possible balls. They feature dual-lip seals running in a micro-groove (labyrinth) and are filled to 90% with extra-high-pressure Almagard 3752 grease for protection against sweat and the elements.
• Enduro Angular Contact (A/C) bearings are designed to engage all balls evenly, distributing force over a larger surface area to minimize wear and maximize service life.

Static load: 935 lbf / 4.15 kN
Weight: 25.25 g