SUMMER TRAINING REPORT ON

NATIONAL BEARING COMPANY

PRESENTED BY :- PUNEET KUMAR SHARMA09ME48

INTRODUCTION NBC was established in 1946 by Mr. B.M. Birla.

It is located at Hasanpura near Railway Station, Jaipur.

The plant spreads over a area of 118 acres of land in Jaipurand 56 acres of land in Newai (Tonk) and also situated in Manesar (Haryana).

The name of company was changed in 1958 from National Bearing Company (NBC) to National Engineering Industries

Limited (NEI).

NEI has grown at a CAGR of 19% since 2007-2008.

HARDNESS TESTING

For ball bearing races, tapered rollers, tapered rollers bearing races, straight rollers bearing:-

HARDNESS AFTER HARDENING:-RC 62 to RC 66 :- O.K.BELOW RC 62 :- REHARDHARDNESS AFTER TEMPERING:-RC 60 TO RC 64 :- O.K.BELOW RC 64 :- RETEMPERBELOW RC 60 :- REHARD

HARDNESS TESTING MACHINE

WASHING WORKPIECE IN TRI-CHLORO SOLUTION

5% METHANOL NITRATE SOLUTION FOR 1 MIN.

10%METHANOL CHLORIDE FOR 3 MIN.

1% SODA SOLUTION FOR 20 SEC.

WASHING WATER & RUST PREVENTIVE OIL

CHECK GRINDING BURN

BURNING CHECK ON TRACK

SURFACE FINISH TESTING MACHINE

AXIAL NOISE & VIBRATION TESTING

AXIAL NOISE & VIBRATION TESTING MACHINE

THE BEARING IS SUPPOSED TO BE PRODUCE LOW NOISE HENCE THIS MACHINE ROTATES THE BEARING AT CERTAIN RPM AND NOISE IS CHECKED. THE NOISE LIMIT IS NEARBY 0.1 MPA.

WEAR TESTING

DEMAGENETIZER

It is a machine which is used to remove magnetism induced during the above process. It is done by impact hitting.

VISUAL INSPECTIONNow, the bearing is checked manually by the operators. All the dimensions and surface properties are checked and rejected workpiece are sent again for correction.

WEIGHT CHECKING

AT THIS STATION, WEIGHT OF BEARING IS CHECKED AND IF THE WEIGHT IS NOT COMPATIBLE WITH THE GIVEN STANDARD OF WEIGHT LIMITS, MACHINE WILL REJECT THE WORKPIECE SAMPLE.

PRESS CHECKINGAT THIS STATION, THE BEARING IS CHECKED WHETHER ITS ASSEMBLY IS PRESSED PROPERLY OR NOT.

FINAL CHECKING THIS MACHINE HAS 2 OR 4 STATIONS WHERE

VARIOUS DIMENSIONS OF FINAL BEARING ARE CHECKED. IF ANY BEARING IS FOUND INCOMPATIBLE WITH THE GIVEN DIMENSIONS AND TOLERANCES, THEY ARE REJECTED BY THE MACHINE.

IN IDEAL POSITION 1, WIDTH OF BEARING,

RUNOUT AND COMMET OR CLEARANCE OF BEARING IS CHECKED. AND AT IDEAL POSITION 2, BORE SIZE, TAPER AND ROUNDNESS ARE CHECKED.