Page 18 - Fitter- 1st Year TT - Kannada

Ap pro p ria te 65. Practice use of angular measuring Screw threads: terminology, parts,
Measuring instrument. (04 hrs.) types and their uses. Screw pitch
Instrument 66. Counter sink, counter bore and ream gauge: material parts and uses.
- V ernier , split fit (three piece fitting). (04 hrs.) Taps British standard (B.S.W.,
Screw Gauge, 67. Drill through hole and blind holes. (2 B.S.F., B.A. & B.S.P.) and metric
Micrometer] hrs.) /BIS (coarse and fine) material,

CSC/N0304 68. Form internal threads with taps to parts (shank body, flute, cutting
standard size (through holes and edge). (03 hrs.)
blind holes). (3 hrs.)

69. Prepare studs and bolt. (13 hrs.)

70. Form external threads with dies to Tap wrench: material, parts, types
standard size. (08 hrs.) (solid &adjustable types) and their
uses removal of broken tap, studs
71. Prepare nuts and match with bolts. (15 (tap stud extractor).
hrs.)
Dies: British standard, metric and
BIS standard, material, parts, types,
Method of using dies. Die stock:
material, parts and uses. (06 hrs.)

72. File and make Step fit, angular Drill troubles: causes and remedy.
fit, angle, surfaces (Bevel gauge Equality of lips, correct clearance,
accuracy 1 degree). (12 hrs.) dead centre, length of lips. Drill

73. Make simple open and sliding fits. (08 kinds: Fraction, metric, letters and
numbers, grinding of drill. (04 hrs.)
hrs.)
Grinding wheel: Abrasive, grade
74. Enlarge hole and increase internal dia.
(2 hrs.) structures, bond, specification, use,
mounting and dressing. Selection of
75. File cylindrical surfaces. (5 hrs.) grinding wheels. Bench grinder parts
76. Make open fitting of curved profiles. and use. (04 hrs.)
(15 hrs.)

77. Correction of drill location by binding Gauges- Introduction, necessity,
previously drilled hole. (04 hrs.) types. Limit gauge: Ring gauge,
snap gauge, plug gauge, description
78. Make inside square fit. (16 hrs.) and uses.
Description and uses of gauge-
types (feeler, screw, pitch, radius,
wire gauge). (05 hrs.)

Professional Make different fit of 79. Make sliding ‘T’ fit. (21 hrs.) Interchange ability: Necessity
Skill 126Hrs; components for in Engg, field definition, BIS.
assembling as per Definition, types of limit, terminology
Professional
Knowledge required tolerance of limits and fits-basic size, actual
28Hrs observing principle size, deviation, high and low limit,
of interchange zero line, tolerance zone Different
ability and check standard systems of fits and limits.
for functionality. British standard system, BIS
[Different Fit - system. (05 hrs.)
Sliding, Angular,
Step fit, 'T' fit,
Square fit and
Profile fit; Required
tolerance: ±0.04
mm, angular
tolerance: 30 min.]
CSC/N0304

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