TY JOUR TI BALL TRANSMISSION RESEARCH KW geometric synthesis KW helix KW ball KW groove surface KW hollow cage KW rectilinear slot JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Strel'nikov, V.N. AU Degtyar', A.N. PY 2025 IS 10 PB Belgorod State Technological University named after V.G. Shukhov