Axis 6310 2RS Ball Bearing - 50.0mm Bore BK 1280K8 is a micro-v belt

1280K8 is a micro-v belt used on serpentine and multi-rib accessory drives — HVAC blowers

so a 16/B76 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

1150K12 has 12 ribs and a 115

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"mpn":"TB98551069"

Axis 6310 2RS Ball Bearing - 50.0mm Bore BK 1280K8 is a micro-v beltThe Axis 6310 2RS is a radial ball bearing engineered for reliable performance in industrial applications. With a 50. 0mm bore and 110. 0mm outside diameter, this bearing is designed for precision fit and long service life. Rated for 13900. 0 lbf dynamic load capacity, it handles demanding operational requirements. Specifications Bore (d) 50. 0 mm Outside Diameter (D) 110. 0 mm Width (B) 27. 0 mm Dynamic Load Rating (Cr) 13900. 0 lbf Static Load