1. Steel ball lapping by lap with V-shape groove;Itoigawa;Trans. JSME,1993
2. Ball parts lapping with semicircular groove lap (1st report, study for form error with three lobes in cross section);Itoigawa;Trans. JSME,1997
3. A lapping system for ultra-precision bearing balls;Goto;J. JSPE,1996
4. A lapping system for improving the waviness of ultra-precision steel balls;Goto;J. JSPE,1997
5. The influence of the groove depth of laps on the waviness generated on lapped balls in ball lapping;Goto;J. JSPE,1998