ACB4051KK Road Bike Headset Bearings, Size 51x40x6.5mm 36x36 Degree Chrome Steel Tapered Upper Lower ACB Bearing Set, Parts Repair for FSA Shimano Crank（2Pcs）

Tech Brief – Bearing seal cross-sectionAt FUSHI we manufacture and use Angular Contact Bearings (ACB) for our headsets. We use only the best manufacturing and quality control methods available.The manufacturing process begins with the rough shape of the bearing races being machined from high quality steel. Both the inside and outside of each race is then precision stone-ground to reach its final shape.Computer controlled grinding equipment is used to grind each race to exact tolerances.The races are then assembled with the balls to create the finished bearing.Caged Bike ball bearing Description :Enable to replace original parts (crankshaft bearing, headsets, hubs).The diameter are measured inside and outside (it's an approximate value in mm).Item : ACB4051KK 36/36Type : Angular Contact BearingInside Diameter : 51 mmOutside Diameter : 40 mmThickness : 6.5 mmInner Chamfer : 36 degreeOuter Chamfer : 36 degreeQty: 1 Lot = 2 Pcs

• DIMENSIONS: 40 mm inner diameter, 51 mm outer diameter, 6.5 mm thickness. and 1 Pack with 2 bearings.
• GREASE:They are characterized by excellent water resistance and load-carrying properties and help provide long-term protection against rust and corrosion.
• Sealed ACB:Featuring highly polishes races, angled chamfer areasand high grade balls, We contact bearings come in a variety of sizes and grades, These bearings slip fit into headset cups or head tubes.
• Bearing CareTo prolong the life of your bearings, do not direct a high jet of water near areas of your bike where there bearings are located - an ingress of water can lead to premature bearing failure.
• 52100 Chrome Steel，Pre-lubricated,Suitable for Most Bikes.