Thin Section Ball Bearings are designed for applications where space limitations are critical.As the name suggests, these bearings have a minimal difference between the inner and outer diameters of the rings, resulting in a thinner section.This design allows for compact installations while maintaining the ability to support light radial, thrust, or combined loads.The 6811-ZZ bearing is part of the 6800 series, which is suitable for limited space applications with light load requirements.It features a bore diameter of 55 mm, an outer diameter of 72 mm, and a width of 9 mm.Constructed from 52100 steel, this bearing includes metal shields on both sides (ZZ type) to retain lubricant and protect against.It comes pre-greased and has a standard C0 radial clearance.The bearing meets ABEC-1 standards and weighs 83 grams per unit.Each order includes 4 pieces.These bearings offer low torque due to their small sectional area and efficient design.Sealing options include open, shielded, and sealed variants, providing flexibility in lubrication and mounting methods.The 6700 series, noted for very limited space and very light loads, incorporates low-friction seals, but the 6800 series balances space savings with slightly higher load capacity.Other metric thin section series include: - 6700 Series: For extremely limited space and very light loads - 6800 Series: For limited space and light loads - 63800 Series: Combines the load capacity of the 6800 series with the narrower width of the 6900 series - 6900 Series: For limited space and relatively heavier loads compared to 6700 and 6800 series