Page 18 - Fitter 1st Year TT

80.File fit- combined, open angular and Method of expressing tolerance as
sliding sides. (08 hrs.) per BIS Fits: Definition, types,
description of each with sketch.
81.File internal angles 30minutes Vernier height gauge: material
accuracy open, angular fit. (12 hrs.) construction, parts, graduations
(English & Metric) uses, care and
maintenance. (04 hrs.)

82.Make sliding fit with angles other than Pig Iron: types of pig Iron, properties
90o (21 hrs.) and uses.
Cast Iron: types, properties and
usesWroughtiron:- properties and
uses.
Steel: plain carbon steels, types,
properties and uses.
Non-ferrous metals (copper,
aluminium, tin, lead, zinc) properties
and uses. (05 hrs.)
83.Scrap on flat surfaces, curved surfaces Simple scraper- flat, half round,
and parallel surfaces and test. (04 hrs.) triangular and hook scraper and
their uses. Blue matching of
84.Make & assemble, sliding flats, plain scraped surfaces (flat and curved
surfaces. (12 hrs.) bearing surfaces). Testing scraped
85.Check for blue math of bearing surfaces: ordinary surfaces without
surfaces- both flat and curved surfaces a master plate. (04 hrs.)
by wit worth method. (5 hrs.)83.
Scrap surfaces- both flat and curved
surfaces by wit worth method. (5 hrs.)

86.File and fit combined radius and angular Vernier micrometer, material, parts,
surface (accuracy ± 0.5 mm), angular graduation, use, care and
and radius fit. (15 hrs.) maintenance. Calibration of
87.Locate accurate holes & make accurate measuring instruments.
hole for stud fit. (2 hrs.) Introduction to mechanical fasteners
88.Fasten mechanical components / sub- and its uses.
assemblies together using screws, bolts Screw thread micrometer:
and collars using hand tools. (5 hrs.) Construction, graduation and use.
(05 hrs.)

89.Make sliding fits assembly with parallel Dial test indicator, construction,
and angular mating surface. parts, material, graduation, Method
(± 0.04 mm) (21 hrs.) of use, care and maintenance.
Digital dial indicator. Comparators-
measurement of quality in the
cylinder bores. (05 hrs.)

Professional Produce 90.Lathe operations- Safely precautions to be observed
Skill 95 Hrs; components 91.True job on four jaw chuck using knife while working on a lathe, Lathe
involving different specifications, and constructional
Professional operations on lathe tool. (5 hrs.) features. Lathe main parts
Knowledge observing standard 92.Face both the ends for holding between descriptions- bed, head stock,
15 Hrs procedure and centres. (06 hrs.) carriage, tail stock, feeding and thread

check for accuracy. 93.Using roughing tool parallel turn ± 0.1 cutting mechanisms. Holding of job
[Different mm. (06 hrs.) between centres, works with catch
Operations - plate, dog, simple description of a
facing, plain 94.Measure the diameter using outside facing and roughing tool and their
turning, step caliper and steel rule.(1 hr.) applications. (04 hrs.)
turning, parting,
chamfering,

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