The HH914449/12 is a single-row imperial tapered roller bearing composed of separable HH914449 inner cone roller assembly and HH914412 outer cup. It is standard inch size 66.675×177.8×57.15mm, capable of bearing heavy combined radial and one-way axial loads simultaneously. Optimized internal roller crowning reduces edge stress, stable under heavy impact load, widely used in heavy truck drive axles, mining machinery, port equipment and large industrial reducers.