METHOD TESTING DISPLACEMENT OF CONTACT POINT RELATIVE TO NOMINAL POSITION OF RACES OF DOUBLE-ROW AND SINGLE-ROW ANGULAR BALL BEARINGS AND GEAR FOR IMPLEMENTATION OF METHOD Russian patent published in 2002 - IPC

FIELD: manufacture of angular ball bearings. SUBSTANCE: method consist in measurement of deviation of diameter in outer ΔD_r and inner Δd_r raceways in unspecified axial section. Deviation of assembly dimension β₀ from nominal values is measured along straight lines making angle ΔK of contact in bearing with perpendiculars to axis of race. Result of measurement of races is converted to parameter ΔV characterizing deviation of angle of contact in bearing by formula ΔC = ΔC_o-ΔC_i, where ΔC_o = -ΔK_o•ctgβ₀+0,5ΔD_r/sinβ₀ is for outer race; ΔC_i = -ΔK_i•ctgβ₀+0,5Δd_r/sinβ₀ is for inner race. If parameter ΔC does not exceed permissible value diameter of balls for assembly of bearing from measured races is determined by formula ⊘_b = (ΔK_o+ΔK_i)+⊘_bо,, where ⊘_bо is nominal diameter of balls in bearing. Gear for implementation of method comprises instrument measuring outer races and instrument measuring inner races. Each instrument includes frame to base measured race, two measurement heads anchored on frame to measure assembly dimension of race, first unit summing electric signals of measurement heads measuring diameter of raceway, second unit summing electric signals of measurement heads measuring assembly dimension, unit of algebraic summation and two reading indicators. First indicator is connected to input of second summing unit, second indicator is connected to output of unit changing scale of electric signals. EFFECT: generation of results making it feasible to determine possibility of assembly of bearings, simplification of measurement method. 2 cl, 5 dwg