Page 13 - Fitter 2nd Year TT - Telugu

tasting surfaces quality –
dimensional tolerances of surface
finish. (06 hrs.)

130. Prepare Stepped keyed fitting and Honing: Application of honing,
test job. (16 hrs.) material for honing, tools shapes,
grades, honing abrasives. Frosting-
131. Lapping holes and cylindrical
surfaces. (5 hrs.) its aim and the methods of
performance. (05 hrs.)
132. Dovetail and Dowel pin assembly. (16 Metallurgical and metal working
hrs.) processes such as Heat treatment,
various heat treatment methods -
133. Scrape cylindrical bore. (5 hrs.)
normalizing, annealing, hardening
and tempering, purpose of each
method, tempering colour chart. (06
hrs.)

134. Scrapping cylindrical bore and to Annealing and normalizing, Case
make a fit-(12 hrs.) hardening and carburising and its
135. Scrapping cylindrical taper bore and methods, process of carburising
(solid, liquid and gas). (07 hrs.)
check taper angle with sine bar. (08
hrs.)

136. Make a cotter jib assembly. (20 hrs.) Tapers on keys and cotters
permissible by various standards.
(06 hrs.)

137. Hand reams and fit taper pin. (12 The various coatings used to protect
hrs.) metals, protection coat by heat and
electrical deposit treatments.
138. Drilling and reaming holes in correct
location, fitting dowel pins, stud, and Treatments to provide a pleasing
bolts. (08 hrs.) finish such as chromium silver
plating, nickel plating and
galvanizing. (05hrs.)

Professional Make different 139. Making a snap gauge for checking Gauges and types of gauge
Skill 113Hrs; gauges by using a dia. of 10 ± commonly used in gauging finished
Professional standard tools & product-Method of selective
Knowledge equipment and assembly ‘Go’ system of gauges,
30Hrs checks for hole plug basis of standardization.
specified (06 hrs.)
accuracy .
[Different Gauges 140. Scrape external angular mating Bearing-Introduction, classification
– Snap gauge, Gap surface and check angle with sine (Journal and Thrust), Description of
gauge; Specified bar. (15 hrs.) each, ball bearing: Single row,
Accuracy - 141. Scrape on internal surface and check. double row, description of each, and
±0.02mm] (10 hrs.) advantages of double row. (06 hrs.)
(Mapped
NOS:CSC/N0304) 142. Practice in dovetail fitting assembly Roller and needle bearings: Types
and dowel pins and cap screws of roller bearing.
assembly. (16 hrs.)
Description & use of each. Method
143. Industrial visit. (5 hrs.) of fitting ball and roller bearings
(06 hrs.)

144. Preparation of gap gauges. (12 hrs.) Bearing metals – types,
145. Perform lapping of gauges (hand composition and uses.
lapping only) (10 hrs.) Synthetic materials for bearing: The
plastic laminate materials, their

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