1.Product Overview HTFB31-16A1 non-standard open deep groove ball bearing, size 31×80×16mm, upgraded version of HTFB31-16 for auto manual and automatic gearbox differential and intermediate shafts. Open design without rubber seals, matched stamped steel cage and C0 standard clearance. It bears radial load and slight bidirectional axial load, stable low-noise high-speed operation under frequent shifting vibration. Made of fully quenched high-purity GCr15 steel with tighter