• Elecon Engineering Company Limited

Hot Sizing Mill Gearbox (pix ele7)

Special purpose custom built gearbox, type SBN 2 x 570 705 S/SO has been developed for driving 7 roll stand hot sizing mill for stainless steel pipe finishing. The gearbox is basically designed to transmit power from 2 x 340 kW, 750 RPM DC motor with a reduction ratio of 15.95:1. It consists of twin-double reduction stages having two input shafts followed by cluster of l : l ratio gear trains resulting into 7 output shafts which are rotating at the same speeds, but having different direction of rotations. The gear is made from high tensile carburising alloy steel, 17 CrNiMob as per DIN 17210 case hardened to 60 ± HRC and precisely ground to class of accuracy 6 as per DIN 3961-63. The output shaft is made from medium carbon steel CK 60 V as per DIN 17200 of adequate size to withstand heavy load transmission for better rigidity without undue deflection. The shaft is supported by anti friction spherical roller bearings of adequate size to take care of radial as well as axial loads permitting large degree of freedom against misalignment. The forced lubrication system is supplied along with the gearbox incorporating various monitoring and inter locking for temperature pressure, flow rate, etc, to achieve smooth and trouble free operation during load transmission.