Page 69 - Turner 1st sem Practicals

Job sequence

TASK 1: Cutting external thread

• Check the given raw material for its size. • Hold the workpiece in a bench vice with 'V' bolck.
• Select the 3/8 BSW Die, M10 Die and Diestock. • Cut external threads both ends using a hand die and
match with M10 and 3/8 BSW thread nut.

TASK 2 : Cutting internal thread

• Check the given raw material for its size. • Drill through holes ϕ 8.5 and ϕ 7.5mm related to tap
holes.
• File and finish the given material to 78 x 10 x 120 mm
size. • Drill tap drill size holes for 3/8 BSW screw and chamfer
the end with a countersink.
• Remove the sharp edges.
• Cut 3/8 BSW with the tap.
• mark and locate centre of drilling
• Repeat the same for M10and BSF tapped holes.

TASK 3 : Cutting pipe thread
• Select 1" pipe of required length (1 Inch is bore dia of • Hold the pipe in a pipe vice with collect.
pipe).
7 ' '
' ' • Form the thread to a standard length of (or) 22.2mm
11
• Standard size of pipe OD 1 (or) 34.13mm and 11 8
32 • Hold vertically thread coupling in a pipevice.
TPI.
• Select 1'' BSP tap set and tap wrench.
• Select the 11 TPI Die set and Diestock.
• Form the thread 1" BSP using tap set.
• Hold the Die in a Diestock.
• Check for its matching with 1" pipe.

Producltion & Manufacturing : Turner - Exercise 1.2.20 57