Page 18 - Fitter 1st Year - TT - Hindi
P. 18

MeasuringInstrument  68.Form internal threads with taps to  their uses, determining hole size (or
                     - Vernier, Screw     standard size (through holes and blind  reaming), Reaming procedure.
                     Gauge,Micrometer]    holes). (3 hrs.)                   Screw threads: terminology, parts,

                     CSC/N0304         69.Prepare studs and bolt. (13 hrs.)  types and their uses. Screw pitch
                                                                             gauge: material parts and uses.
                                                                             Taps British standard (B.S.W.,
                                                                             B.S.F., B.A. & B.S.P.) and metric /
                                                                             BIS (coarse and fine) material, parts
                                                                             (shank body, flute, cutting edge).
                                                                             (03 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 fit, angle, Drill troubles: causes and remedy.
                                          surfaces (Bevel gauge accuracy 1 Equality of lips, correct clearance,
                                          degree). (12 hrs.)                 dead centre, length of lips. Drill
                                                                             kinds: Fraction, metric, letters and
                                       73.Make simple open and sliding fits. (08  numbers, grinding of drill. (04 hrs.)
                                          hrs.)
                                                                             Grinding wheel: Abrasive, grade
                                       74.Enlarge hole and increase internal dia.  structures, bond, specification, use,
                                          (2 hrs.)
                                                                             mounting and dressing. Selection of
                                       75.File cylindrical surfaces. (5 hrs.)  grinding wheels. Bench grinder parts
                                                                             and use. (04 hrs.)
                                       76.Make open fitting of curved profiles.
                                          (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 in
       Skill 126Hrs;  components for                                        Engg, field definition, BIS. Definition,
                     assembling as per
       Professional  required tolerance                                     types of limit, terminology of limits
       Knowledge     observing principle                                    and fits-basic size, actual size,
       28Hrs                                                                deviation, high and low limit, zero
                     of interchange                                         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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