30-01-2013, 10:43 AM
NATIONAL ENGINEERING INDUSTRIES LTD., JAIPUR
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INTRODUCTION
NATIONAL ENGINEERING INDUSTRIES LTD., JAIPUR was founded in the year 1946 as a pioneer industry in the field of bearing manufacture by the renowned industrialist, late Shri B.M. Birla, under the name of "National Bearing Company Limited." The first bearing was manufactured in 1950 with a modest start of 30,000 bearings in 19 sizes. The company is now manufacturing nearly 3.8 million bearings per month in over 500 different sizes ranging from 6 mm bore to 1300 mm outer diameter and has the capacity to manufacture bearings up to 2000 mm outer diameter. At NEI, the development of bearings is a never ending job. With ever increasing activities and grant of industrial licenses for other vital industries and manufacturing of Roller Bearing Axle Boxes for Railway Rolling Stock, Steel Balls, Tapered Roller Bearings, Spindle Inserts etc., the name of the company was changed in 1958 to "National Engineering Industries Ltd." retaining its original trade mark NBC.
PRODUCTS
BALL BEARINGS
The initial technology was from Hoffman Manufacturing Company Ltd., U.K. a collaboration, which continued for 20 years. We offer a wide range of both metric and inch series deep groove ball bearings, angular contact ball bearings, self-aligning ball bearings etc. With NEI’s tie up with the world's leading bearing manufacturing company NTN Corporation, Japan, we have gained access to the most advanced ball bearing technology i.e. thermo mechanical bearings (TMB) and tensioner bearings available today and our wide range of ball bearings is increasing under this collaboration.
PRECISION STEEL BALLS
Manufactured using the most modern facilities available in India, quality steel balls, up to 25 mm in diameter for NBC bearings are manufactured in precision lines imported from NTN Corporation, Japan. NBC ball bearings are now specially manufactured with high precision steel balls produced in ultra modern plant equipped with high speed headers, electronically controlled flashing, grinding, and lapping machines to ensure accuracies of sub-micron levels.
ROLLER BEARING AXLE BOXES
These bearings were developed by NBC for the Indian Railways for use in rolling stocks and perform superbly even in the high speed Rajdhani locomotives. The Yugoslavian and Egyptian Railway wagons also implement these bearings.
A total of 34 different types of the axle boxes are turned out at the NEI plant in Jaipur. Designs for high speed railway application are being developed together with NTN. More than one million NBC axle boxes and roller bearings are in operation with Indian Railways. NEI has the privilege of being the single largest source of bearings to Indian Railways, which is one of the largest networks of its kind in the world.
MANUFACTURING AT JAIPUR
BALL BEARING
Precision Ball Bearings from 6 mm bore to 75 mm bore diameter are manufactured on state of the art manufacturing facilities with in-process and post-process gauging in grinding and centrally air conditioned assembly lines with auto gauging and testing equipments. The latest advanced techniques for manufacturing and Quality Assurance are implemented to meet the rapid increase in demand for quality, diversity of specifications and new types of bearings. This division is spread over a covered area of 14,694 sq. Meters.
TAPERED ROLLER BEARING
Precision Tapered Roller Bearings are manufactured in Inch and Metric series from 15.875mm bore to 95.25mm bore with technology obtained from our earlier collaborator, Federal Mogul Corporation, USA and now with NTN Corporation, Japan. These bearings are used by all major Automobile manufacturers in the country as Original Equipment. This division is spread over a covered area of 11,652 sq. Meters.
LARGE DIAMETER BEARING
Self-sufficiency in steel is the call of the day, so is the importance of bearings in Steel Mills Equipment. NEI has the distinction of being one of the ten manufacturers of these bearings in the world, who can manufacture large diameter bearings up to 2000 mm diameter. The largest bearing manufactured by NEI for fitment to the Plate Mill of Rourkela Steel Plant was released by Mr. G.P. Birla in September 1985. This 4-Row Tapered Roller Bearing measures 1300 mm diameter and weighs 4.39 tons.
ROLLER BEARING IN AXLE BOX
With the production of Roller Bearings and Axle Boxes since 1952, the company has fully met the requirements of the Indian Railways (one of the largest systems of the world) by designing and developing Axle Boxes and bearings for fitment to Locomotives manufactured by Diesel Locomotive Works, Chittaranjan Locomotive Works, various wagon builders, the ICF broad and meter gauge coaches. Over a million NBC bearings and boxes are in service with the Indian Railways. The development of completely indigenised Axle Boxes and bearings for the high speed Rajdhani Locomotive, the Yugoslavian and Egyptian Railway wagons are the highlights of the design capabilities at NEI. On date more than 100 types of Axle Boxes & Bearings have been manufactured.
CARTRIDGE TAPERED ROLLER BEARING
For fitment to the new BOX-IN Uprated Wagons designed by the RDSO, NEI is the only manufacturer in the country to indigenise these bearings to a high percentage under collaboration with the largest manufacturer of these bearings in the world. Production of these bearings commenced in the year 1984. These bearings are grease packed and require no field lubrication for a period of 7 years. This division is spread over a covered area of 4,855 sq. Meters.
INPUT SCAN
During I/P scan the PLC reads the ON/OFF status of inputs & stores them in the image memory before execution of program. This information is stored & held valid till the next scan of input module. No change in status is acknowledged in between scan sequence
LOGIC SCAN
The PLC executes the user program taking into consideration the status from image memories & not that of actual physical elements. Depending upon the logic, the output image memory is updated as the program execution processes & result is conveyed to the CPU memory for intermediate storage.