This document provides details about an industrial training completed at National Bearing Company in Jaipur, India. It discusses the company's profile, facilities, and main product lines. The training focused on tapered roller bearings, including their manufacturing processes. Key points covered include an overview of bearing types, materials used, and the various production steps involved in machining inner and outer rings, rollers, and cages, followed by assembly. The training aimed to provide both technical and practical knowledge on bearings to fulfill requirements for a Bachelor's degree in Mechanical Engineering.

1. A
Industrial training
Taken on
National Bearing Company (Tapered Roller Bearing), Jaipur
Submitted
In partial fulfillment
For the award of the degree of
Bachelor of Technology
In Department of Mechanical Engineering
Session 2011-2015
SUBMITTED TO:- SUBMITTED BY:-
Mr. Harimohan Sharma Kumar Sawan Basetha
(Head of Mech. Department) Roll No.-11EAGME028
i
B.TECH – (VII sem)
APEX GROUP OF INSTITUTIONS, JAIPUR
RAJASTHAN TECHNICAL UNIVERSITY, KOTA
SEPTEMBER, 2014

2. CERTIFICATE
ii

3. ACKNOWLEGMENT
I would like to extend my heartfelt gratitude towards Apex Group of institutions
jaipur for providing me with an excellent opportunity to undergo Seminar from this
prestigious engineering College of our country.
On the personal front I must thank Mr. Harimohan Sharma Head of Department –
Mechanical, for providing me the very first introduction on the practical side of the
subject, thereby opening an interesting Seminar Project opportunity besides extending
me valuable guidance from time to time.
It is difficult to overstate my gratitude towards my faculty, Mr. Amit Sharma
Mechanical Department. It was only with his active support, inspiration and efforts to
explain concepts clearly, that this seminar program became very interesting and
fruitful for me. Throughout the seminar project period he was a constant source of
encouragement, guidance, and knowledge. Despite his busy work schedule with the
ongoing projects, he took out time to help me collect plenty of study material from the
in-house resources as well as made himself available to clear all the doubts and
problems which arouse during the course of the training.
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4. ABSTRACT
We feel profound happiness in forwarding this industrial training report as an image
of sincere efforts. It is almost in evitable to ensure indebt ness to all who generously
helped by sharing their valuable experience & devoting their precious time with us,
without whom this industrial training report would never have been accomplished.
I am highly indebted to Mr. Aditya Shangi in the Ball department for providing us
with the opportunity of industrial training such reputed and leading industry where we
were not only trained in technical aspects but also on human grounds. We also thanks
to the staff of the industry who, throughout the visit guided us their valuable guidance
is indeed praiseworthy in the entire process.
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5. CONTENTS
FRONT PAGE………………………………….…………………………….…..….i
CETIFICATE…………………………………………………………………….….ii
ACKNOWLEDGEMENT…………………………………………………………..iii
ABSTRACT………………………………………………………………….......….iv
CONTENTS…………………………………………………………………....……v
LIST OF FIGURE……………………………….…………………………………viii
v
CHAPTER-1
INTRODUCTION…………………………….…………………………………….…1
1.1. Company profile…………………………….………………………………….…1
1.2. Milestones ………………………………….………………………………….…2
1.3. Technical collaboration …………………….……………………………….……3
1.4. Main Customers………………………………………………………………..…3
1.5. Manufacturing Facilities………………………………………………………..…4
1.5.1. Newai (Gunsi) Plant…………………….……………………………………5
1.5.2 Manesar Plant……………………………………………………………….…5
CHAPTER-2
NBC JAIPUR……………………………………………………………………….…6
2.1. Introduction…………………………………………………………………….…6
2.2. Ball Bearing…………………………………………………………………….…7
2.3. Precision Ball Making ……………………....……………………………………8
2.4. Tapered roller bearing……………………….……………………………………8
2.5. Railway bearing…………………………….…………………………………….9
2.5.1 Roller bearing & axle boxes……………...……………………………………9
2.5.2. Spherical roller bearing………………...……………………………………10
2.5.3. Cartridge tapered roller bearing………..……………………………………11
2.6. Large diameter bearing……………………..……………………………………11
2.7. Research and development ………………...……………………………………11
2.7.1. Design and development……………….……………………………………11
2.7.2. Machine building……………………………………………………………12
2.8. SAP-ERP…………………………………..………………………………….…12

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CHAPTER-3
BEARING…………………………………….……………………….……...……...13
3.1. Definition of Bearing………………………………………………….…………13
3.2. Principles of Operation…………………...……………………………...………13
3.3. Motions…………………………………………………………….…….………14
3.4. Loads………………………………………………………………………….…14
CHAPTER-4
CLASSIFICATION OF BEARING……………………………………………….…15
4.1. Sliding contact bearing…………………….………………………………….…15
4.1.1. Hydrodynamic bearing………………...………………………………….…15
4.1.2. Hydrostatic bearing……………………………………………………….…16
4.2. Rolling contact bearing……………………………………………………….…16
4.2.1. Ball Bearings……………………………………………………..……….…16
4.2.2. Roller Bearings……………………………………………………...…….…16
4.2.2.1. Tapered Roller Bearings…………..………………………………….…16
CHAPTER-5
MATERIAL USED IN BEARING ……………………………………………….…17
5.1. Bearing material…………………………...………………………………….…17
5.2 Flow of Material in Bearing ……………….………………………………….…18
CHAPTER-6
TAPERED ROLLER BEARING………………………………………………….…19
6.1. Introduction………………………………..………………………………….…19
6.2. Product Subtypes………………………….………………………….……….…20
6.2.1. Single Row (TRB) …………………….………………………………….…20
6.2.2. Double Row (TRB) …………………...………………………………….…21
6.2.3. Four Row (TRB) ……………………...………………………………….…21
6.2.4. Tapered Roller Thrust…………………………………………………….…21
CHAPTER-7
PROCESS OF MANUFACTURING………….………………………………….…22
7.1. Manufacturing Processes of Tapered Roller Bearing Bearing………..…………22
7.2. Heat treatment and laboratory………………………………………..……….…23
7.3. Carburizing…………………………………………………………..…….….…24
7.4. Hardening Furnace…………………………………………………..…….….…25

7. 7.5. Quenching…………………………………………………………………….…25
7.6. Tampering…………………………………………………………………….…26
7.7. Rockwell hardness test……………………………………………….……….…27
7.8. Grinding Section……………………………………………………..……….…28
7.9. Assembly section………………………………………….………….…………29
7.10. Maintenance and inspection section……………………………………………29
7.10.1 For machines………………………………………….………….…………29
7.10.2. For bearing components………………………………………..….………30
CHAPTER-8
MANUFACTURING & ASSEMBLY………………………………………...….…31
8.1. Inner & Outer Ring Manufacturing…………………………………..……….…31
8.2. Roller Manufacturing…………………………………………………...…….…33
8.3. Cage Manufacturing………………………………………………….……….…34
8.4. Roller Bearing Assembly Line……………………………………….……….…35
CHAPTER-9
APPLICATIONS………………………………………………………….……….…36
CHAPTER-10
CONCLUSION…………………………………………………………………....…37
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8. LIST OF FIGURE
S.No Name Page
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Fig.1.1 Milestones of NEI …...………………………………………….
Fig.1.2: Manesar Plant …………………………………………………..
Fig.2.1: Jaipur Plant ……………………………………………………..
Fig.2.2: Nbc Design and Development …………………………………
Fig.2.3: Ball Bearings …………………………………..……………….
Fig.2.4: Steel Ball ……………………………………………………….
Fig.2.5: Tapered Roller Bearings ……………………….……………….
Fig.2.6: Axle Boxes ………………………..…………………………….
Fig .2.7: Railway Bearings ……………………………………...……….
Fig.4.1: Hydrodynamic bearing …………………………………...…….
Fig.4.2: Hydrostatic bearing ………………………………………….….
Fig.5.1: Flow of Material in Bearing…………………………………….
Fig.6.1: Tapered roller bearings …………………………………………
Fig.6.2: Tapered roller bearing components …………………………….
Fig.6.3: Single Row (TRB) ……………………………………………...
Fig.6.4: Double Row (TRB) …………………………………………….
Fig.6.5: Four Row (TRB) ……………………………………………….
Fig.6.6: Tapered Roller Thrust ………………………………………….
Fig.7.1: Manufacturing Processes of Tapered Roller Bearing …………..
Fig.7.2: Heat treatment sequence ………………………………………..
Fig.7.3: heating sequence of spherical bearings …………………………
Fig.7.4: Rotary hearth furnace …………………………………………...
Fig.7.5: Tempering furnace ……………………………………………..
Fig.7.6: Rockwell hardness test setup …………………………………...
Fig.7.7: Elements after assembly of spherical bearings …………………
Fig.8.1: Flow Chart of Inner & Outer Ring Manufacturing ……………..
Fig.8.2: Manufacturing of Roller ………………………………………..
Fig.8.3: Cage Manufacturing ……………………………………………
Fig.8.4: Roller Bearing Assembly Line …………………………………
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