BaGang company′s key equipment in category A:sintering machine drum pelletrzer supplied power with 800Kw electrical motor,speed-adjusting hydraulic coupling and reduction box impress a motion upon a wheel,rated speed:976r/min,rated current: 1600A, speed-adjusting hydraulic coupling: YOTPC875/1000, reduction box: SQAS1845-Ⅰ-DXNH-25.46.The effective value of vibration of increasing gear box increased rapidly since 20th April 2008. The introductrion of strate inspection of the equipment is as follows.