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Cone 681 / Cup 672, Timken 681/672, Legacy Imperial Set
Stepping up the internal geometry further, the 681/672 bearing assembly accommodates a massive 5.500" (139.7mm) driveshaft while still seating perfectly into a standard 672 (7.625" / 193.67mm) housing. This specific configuration is vital for drivetrains where immense radial deadweight meets continuous dynamic stress. Engineered with high-purity alloy steel, it offers unyielding rotational stability and exceptional fatigue resistance for specialized heavy machinery.