SINGLE PIECE SOLID (STEPPED CONE PULLEY) PATTERN

AIM:

To make a wooden Single piece solid (stepped cone pulley) pattern  using  a wood turning lathe.

EQUIPMENT:

Wood turning lathe machine.

TOOLS:

Wooden piece,  gouge, chisels, parting tool, finishing tool, sand papers.

SPECIFICATIONS:

Length of bed - 6.5 ft	1980/78"
Height of centers	165/6½"
Admit between centers	1220/48"
Max work diameter	150/6"
Standard pitches	100/4",125/5"
	150/6",175/7",
	250/10"
Divisions	Up to 6
Total power required	Single phase
Approx. wt. of machine - kg.	250

PROCEDURE:

·         Fix the wooden piece in between centres of the wood turning lathe.

·         Centering of the work piece is done by locating the centre of the work piece by drawing diagonals across the corners.

·         Dimensions on the work piece are marked using calipers.

·         Proper cutting speed, feed and depth of cut are selected for the operation

·         The work piece is turned by using roughing gouge to get the required diameter of Ø 100 mm throughout its length.

·         Step turning is done as per the dimensions shown in the figure.

·         Finishing is done by using skew chisel and other tools

·         The waste material on the work piece is removed carefully with the help of chisel.

·         The outer surface of the stepped cone pulley is made smooth with the help of sand paper.

PRECAUTIONS:

·         Wear the goggles in order to protect the eyes from the wood dust.

·         Avoid back chiselling, cut in forward direction only.

·         Check whether the work piece is fixed tightly or not.

RESULT:

Thus, the required shape of the pattern is obtained.