Page 23 - Content.pmd

turn,
grooving, knurling,
taper
turning, threading
(external 'V' only)]
CSC/N0110
95.Holding job in three jaw chuck. (2 hrs.) Lathe cutting tools- Nomenclature
96.Perform the facing, plain turn, step of single point & multipoint cutting
turn, parting, deburr, chamfer-corner, tools,
roundthe ends, and use form tools. Tool selection based on different
(08 hrs.) requirements and necessity of

97.Shoulder turn: square, filleted, beveled correct grinding, solid and tipped,
undercut shoulder, turning-filleted under throw away type tools, cutting
cut, square beveled. (08 hrs.) speed and feed and comparison for
H.S.S., carbide tools. Use of
98.Sharpening of -Single point Tools. coolants and lubricants. (03 hrs.)
(1 hr.)

99.Cut grooves- square, round, 'V' groove. Chucks and chucking the
(08 hrs.) independent four-jaw chuck.
Reversible features of jaws, the
100. Knurl the job. (1 hr.)
back plate, Method of clearing the
101. Bore holes -spot face, pilot drill, thread of the chuck-mounting and
enlarge hole using boring tools. (9 hrs.) dismounting, chucks, chucking
true, face plate, drilling - method of
holding drills in the tail stock, Boring
tools and enlargement of holes.
(02 hrs.)

102. Turn taper (internal and external). (10 General turning operations- parallel
hrs.) or straight, turning. Stepped turning,

103. Turn taper pins. (5 hrs.) grooving, and shape of tools for the
above operations. Appropriate
104.Turn standard tapers to suit with method of holding the tool on tool
gauge. (5 hrs.) post or tool rest, Knurling: - tools
description, grade, uses, speed and
feed, coolant for knurling, speed,
feed calculation.
Taper - definition, use and method
of expressing tapers. Standard
tapers-taper, calculations Morse
taper. (03 hrs.)

105. Practice threading using taps, dies Screw thread definition - uses and
on lathe by hand. (2 hrs.) application. Square, worm,
106. Make external ‘V’ thread. (8 hrs.) buttress, acme ( nonstandard-
screw threads), Principle of cutting
107. Prepare a nut and match with the screw thread in centre lathe -
bolt. (10 hrs.) principle of chasing the screw
thread - use of centre gauge,
setting tool for cutting internal and
external threads, use of screw
pitch gauge for checking the screw
thread. (03 hrs.)

(xxi)