ITI Bangla

  Reamer Which Tool is used for enlarging by finishing previously drilled holes to accurate size - Reamer Which taper shank is used for machine reamer to hold on machine spindle - M.T  Hand Reamer is used to the ream holes manually using - Tap wrench. The angle between the edges and the reamer axis is called - hELIX ANGLE. WHICH REAMER IS USED FOR REAMING MORSE TAPER HOL E - SOCKET. A Taper pin reamer is made with a taper of - 1 in 50. Which Flute reamer is suitable for reaming holes with key way grooves - Helical flutes reamer.   The cutting portion of reamer is made of - H.S.S. The Shank portion of reamer is made of - Carbon steel 

                                                       HACKSAW                                      A hacksaw blade is made of - Low alloy steel or high alloy steel. What is the standard length of hacksaw - 250mm to 300mm What is the pitch of the blade - the distance between adjacent teeth is known as the pitch . How many types of pitch of Hacksaw -   Coarse 1.8                                          -  Medium 1.4-1.0                                          - Fine 0.8mm Type of set -----------------------------------  Pitch Wave set --                                            0.8mm Wave and Staggered --                         1.0mm Staggered set --                                    Over 1.0mm The selection of the blade depends - On the shape and hardness of the material to be cut . For Bronze, Brass, Soft steel, Cast iron, Heavy angles used - 1.8mm pitch. For Tool Steel , High carbon steel , Hss Used - 1.4mm Pitch. Brass tubing

                                               (COMPUND OF METAL ) 1 ) Brass = Cu 70% + Zn 30 % 2 ) Munz Metal = Cu 60% + Zn 40%  3)  Dutch Metal = Cu 80% + Zn 20% 4) Bronze Metal = Cu 90% + Sn 10% 5) Monel Metal; = Cu 70% + Ni 30% 6) Roolled gold = Cu 90% + Al 10% 7) Bell Metal = Cu 80% + Sn 20% 8) German Silver = Cu + Zn + Ni 9) Delta Metal = Cu60% + Zn 38% + Fe 2% 10 ) GUN Metal = Cu 10% + Sn 1% + Zn 1% + Pb88% 11 ) Stainless steel = Fe 75% + Cr15% + Ni10% + C 12 ) Nickel steel = Fe 95% + Ni 5% 13 ) Nichrome + Ni+ Cr + Mn + Fe 14 ) Solder = Pb 50% + Sn 50% 15 ) Mangnalium = Al 95% + Mg 5% 16 ) Duralumin = Al 64% + Cu 3% + Mg2% +Mn1%