About Us


  Luoyang Yongji Heavy Duty Gear Co., Ltd. is a company specializing in the production and processing of standard and non-standard medium- and heavy-duty reduction gearbox, couplings, and equipment and spare parts for metallurgy, petrochemical, coal, mining and other industries.The company has 40 years machining experience. The company covers an area of 20000㎡, including 14500㎡ of standard plants and 4000㎡ of office area and dormitories, and owns around 100 employees including more than 20 engineering technicians and managers with medium and advanced grade.

  Company has achieved 470 million RMB sales and submitted around 20 millions RMB revenue tax since 2004 from 2020. The company passed ISO9001:2000 quality system certification in 2005 and has been awarded the title of "Top Ten Private Enterprises" by Xin'an County Party Committee and County Government for five straight years. In 2010, Company has been honoured "The turstworthy demonstration enterprise in the first term" by Luoyang city goverment.

  1. Hobbing gear and Grinding gear

  The company now owns 11 different kinds of hobbing machine could manufacture gear and gear shaft with maximum 4000mm length, diameter 3200mm and M1.5 - M40, also company has 5 CNC forming gear grinding machines with online synthetic measuring insturment, includes: Niles ZP24、Niles 31、Qinchuan YK73200、YK73125、Hofler 63, which could grind gear and gear shafts from diameter 310mm to 2400mm. Also, KlingeInberg offline 1200 gear measuring instrument had bought for providing customers workpieces with better quality (Gear flank accuracy could reach at AGMA-2015 Q12; DIN 3960 LEVEL 4 and G/B T 10095.1-2008 Level 6).

  2.Heavy duty workpiece machining capabilities

  Company has a heavy duty machining plant, which includes two floor-type milling & boring machines from Tsitsihar 2nd Machine Tool Co., Ltd with 200 diameter machining tool. One CNC vertical lathe with 4000mm diameter from Tsitsihar 2nd Machine tOOL Co., Ltd. Two 1250mm × 4000mm CNC milling machines. Three grinding machines could manufacuturing maximum 5000mm length and 800mm diameter workpiece. Also, two 100T loading capacity cranes had installed for relative heavy duty workpieces machining.

  3.Heat treatment capablities

  In 2014, company has built a heat treantment plant, which has two Bogie-hearth resistance furnaces (3500mm×4000mm) for hardened and tempered. Three well-type carburization furnaces (2500mm×4000mm) for using caburizing workpiece.

  In recent years, our company has undertaken many supporting tasks of national and provincial key projects, and provided complete production lines or supporting hosts for a dozen of large-sized companies, shown as below:

  - Second rolling production line of Heilongjiang Xilin Iron & Steel Group Co.,Ltd. (such as 1#-15# combined gear box, etc.);

  - The 120T converter cooling bed of Anyang Iron and Steel Group Co.,Ltd.;

  - The XGK-LD1400 20-roller complete steel rolling facility of Zhengzhou Top Rolling Technology Co., Ltd. that are exported to INTFOR Group of Romania;

  - The supply of complete sets of “3200-type four-roller medium plate rolling mill project” of Handan Hongri Metallurgy Co., Ltd. (including components such as the 316992kg roller-replacing side stand, the 313948kg transmission side stand, the 103484kg supporting roller replacing tractor, the 175792kg working roller replacing device, the 16800kg screw down reduction gearbox, the 3200kg screw down copper nut, the 13000kg screw down lead screw, pushers, rotatory roller bed);

  - The supply of complete sets of 2400-type four-roller medium plate hot rolling mill for Henan Wanda Aluminum Co., Ltd, including the 195450kg roller-replacing stand, the 195400kg transmission side stand, the 12600kg screw down reduction gearbox, the 3100kg screw down nut, the 9500kg screw down lead screw, etc. (excluding electronic control and electrical appliance);

  - The 4300-type tractor, reduction gearbox, complete machine and parts for Shandong Laiwu Steel (the worm gear modulus is 32, the number of worm heads is 2, and the pressure angle is 20°) We have won the trust of massive users by virtue of excellent quality, premium service and trustworthy reputation.