Elecon has developed as special prupose custom built gear box for Bridle Drive and sheet Mill application. This has two input and two output shafts having independent gear trains driving the output shaft in opposite directions with variation in power input. The output shafts are connected to the rolls which stretch the sheet metal before rolling as well as after rolling.
Teeth of pinion and wheels are of double helical type so as to nullify the axial thrust acting on respective shaft. The gears are made from high tensile carburising alloy steel, 17CrNiMo6 as per DIN-17210 case hardened to 60 ± 2HRC and precisely ground to class of accuracy 6 as per DIN 3961 – 63.
The shafts are supported in Antifriction Spherical Roller Bearings of adepquate size to take care of radial loads permitting large degree of freedom against misalignment.
The gear box is installed with centralised lubrication oil system for providing necessary amount of oil to various gear meshes and bearings thereby resulting into smooth and trouble free operation.
Elecon has already manufactured a smaller in the series, SCF 355/520 for M/s Sponge Iron, Hyderabad and the bigger in the series viz SDN 670/1000 for M/s Essar – Hazira. These are three stage gear boxes having single input and 2 output, driving the briquetting press rolls. Internals of this box is our of 17CrNiMo6 duly case carburized, hardened and precisely ground enhoused on antifriction bearings mounted in fabricated casing.
This gear box is also supplied alongwith a special pair of gear coupling, one of which having facility for adjusting the angular location of the briquetting roll shaft for aligning the cast cavities of the roll liners. The gear box is lubricated by Forced lubrication
ELECON has successfully designed, manufactured and supplied gearboxes for Coiler – Recoiler Drive for Steel Industries. This gear box will be exported to China through Magadh, Indore. This gearboxes are foot mounted, single stage, parallel shaft, helical gear reducer with solid input and special output shaft (in client scope of supply). This gear box has extra heavy duty Spherical Roller Bearings on output shaft to take care of the dead weight of Coil of 25 Tone as well as Coil Tension.
The gear box housing is made up from extra heavy (Sturdy) Mild Steel Fabricated Material of Fe410 WA as per IS 2062 to take care of the shock load due to coil winding and rewinding.
The internals are case carburised, hardened and ground and specially profile and longitudinal corrected to achieve higher rating and low noise level. The gears are made from high tensile carburising alloy steel of 17CrNiMo6 as per DIN-17210 and case hardened to 60 +/- 2 HRC, precisely ground to accuracy class 6. The toothings and bearings are Forced Oil Lubricated.
Gear boxes with Pinion Stand for Wire Rod Mill Drives The recent trend for such mill stands is to go alternatively for one horizontal and one vertical set which avoids 90 stock rotation at the end of each reduction and accordingly the gear boxes have the drive arrangement and the shaft disposition. ELECON made a mark by developing such type of special gear boxes first time in the country as import substitution and supplied to M/S Mukund Ltd and saved sizable amount of foreign exchange.
The set of these gear boxes consist of total 14 No,7 horizontal and 7 vertical, having higher ratio in the beginning and tapering into lower ratio at the tail end. The size varies from SCF 710 / 480 at the bigger end to KAF 315 / 285 at the small end. All the gear internals are out of case carburising steel duly carburised and hardened and precisely ground with profile corrections on all pinions and longitudinal corrections depending on the load, so as to keep the noise level as low as upto 80 db. Forging ratios for the gear internals are specially monitored as well special care is taken in the sealing arrangement. All the bearings as well almost all gear meshing are spray lubricated which are getting adequate supply of lubricating oil from common force lubrication system.
Elecon has developed a special purpose custom built gear box type SBN 2 * 570 – 705 S/SO and supplied to M/s. Jindal Seamless Tubes, Nasik for driving 7 Roll Stand Hot Sizing Mill for Stainless Steel, Pipe finishing.
The gear box is basically designed to transmit power from Two * 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 1:1 ratio gear trains resulting into 7 output shafts which are rotating at the same speeds, but having different direction of rotations.
The gears are made from high tensile carburizing alloy steel, 17 CrNiMo6 as per DIN 17210 case hardened to 60 ± 2 HRC and precisely ground to class of accuracy 6 as per DIN 3961 – 63. The output shafts are made from medium Carbon Steel CK 60 N as per DIN 17200 of adequate size to withstand heavy load transmission for better rigidity without undue deflection.
The piercing mill is used to pierce out and roll the mother tube out of original billet. The single input, double output, two-stage gearbox drives this mill. This is a three metre tall and robust gearbox with a base of 2.8/1.4 meters and weighing around 18 tons.
Technical specifications :
The gears are made from high tensile carburizing alloy steel, 17 CrNiMo6 as per DIN 17210, case hardened to 60± 2HRc and finely ground to accuracy Class 6 as per the DIN standard to give smooth and trouble free operation. Output shafts are made from medium carbon steel CK 60N as per DIN 17200 of adequate size to withstand heavy load transmission for better rigidity without undue deflection. Gears are integral with shaft/key fitted to shaft and are supported in antifriction spherical roller bearings of adequate size to give higher working life and to correct misalignment. Output shafts are also provided with spherical thrust bearings to tolerate axial thrust load in both the directions. Gears and bearings are housed in accurately machined and highly rigid/robust MS fabricated housing to give better performance
Separate motor driven lubricating system is provided to enhance cooling and lubrication of bearings and gear meshings.
For the growing need of steel roling mills, Elecon has developed custom-made gearboxes to obtain variable speed of rolling mill to suit client’s requirements. Such special-purpose gearboxes have been supplied to Precision Equipments, Flat Products and to ultimate users such as Comet Steels, Sipta Steels, Nanded, and Him Ispat, Himachal Pradesh.
|1st gear box K190/80 FSH S/SO||9.75||46 KW at 1500 rpm|
|Gear boxes in series||9.75|
ELECON has successfully designed, manufactured and supplied gearboxes for palm oil industry. This gearboxes are foot mounted, three stage, parallel shaft, helical gear reducer with solid input and out put shaft. The gear box body is out of C.I. and the top gear case has been specially designed to mount electrical motor directly on it. The gear reducer has been fitted with specially designed heavy duty breather plug considering dusty environment.
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