Roller accessories, roller parts manufacturers Yongnian Popular New | day marked specifically for, roller parts manufacturers is provided by day-standard fasteners. Roller accessories, roller parts manufacturers Yongnian Popular New | day marked specifically for, roller parts manufacturers Handan City Days Standard Fastener Co. (www.hdtbjgj.com) 2014 been newly upgraded day marked the launch of Handan City tight Firmware Ltd. specializes in producing vertical roller, roller frame, lifting lugs, connecting piece, nylon ground roller. Mass production of vertical roller, roller frame, lifting lugs, connecting piece, nylon roller to roll parts manufacturers, competitive price, standard fasteners, Ltd. Handan City days to provide you with the vertical roller, roller frame, lifting lugs, connecting piece nylon to roll the latest price quotes for merchants to provide the most valuable vertical roller, roller frame, lifting lugs, connecting piece, nylon ground roller information. Roller stamping housings: Idler housings divided into two kinds of roller fitting specifications, one is stamping bearing, the other one is cast iron (gray iron) bearing. Most stamping bearing and steel welding using cast iron and steel housings are made of extruded. Stamping housings characteristics are sealed, to withstand strong overall, the biggest feature cast iron housing is high concentricity, but lower than the stamping bearing endurance. Handan City, specializing in the production of standard fasteners day vertical roller, roller frame, lifting lugs, connecting piece, nylon ground roller. Mass production of vertical roller, roller frame, lifting lugs, connecting piece, nylon ground roller, price new factory, Handan City days Standard Fastener Co., Ltd. to provide you with the vertical roller, roller frame, lifting lugs, connecting piece, nylon to roll the latest price quotes for merchants to provide the most valuable vertical roller, roller frame, lifting lugs, connecting piece, nylon ground roller information. Electrician letters and numbers ① with silicon steel. Steel said the head of the letters DR electrical hot-rolled silicon steel, DW said cold-rolled non-oriented silicon steel for electrical, DQ said electrical cold rolled grain oriented silicon steel. ② After the digital representation of the letter iron loss value (W / kg) 100 times. ③ steel rear plus the letter "G" by, means of inspection at high frequencies; not added "G" who represents the frequency of 50 cycles under test. Such as steel DW470 said cold-rolled non-oriented silicon steel for electrical products in the frequency of 50 Hz maximum unit weight of iron loss is 4.7W/kg. 13. ① its electrical grade iron letters "DT" and numbers, "DT" said electrician with iron, numbers indicate the sequence number of different brands, such as DT3. ② in the numbers behind the letters plus the electromagnetic properties: A - Advanced, E - grade, C - super, such DT8A.