Page 109 - Turner 1st sem Practicals

Job sequence

• Remove the excess material on the right hand side to • Finish all sides by using smooth grinding wheel.
the required width and length by using a rough grinding • Check the tool by centre gauge; there should not be any
wheel.
light passing through gauge and cutting edges of the
• Grind Half of the thickness of tool on rough grinding tool.
wheel.
• Cutting point is carefully ground in smooth wheel.
• Grind 4° to 8° front clearance angle.
• Finally lap the tool by applying oilstone on cutting
• Hold the tool at an angle 30° to the face of the wheel. edges.
• Grind 30° on left hand side of the tool. Remember

• Repeat the above procedure on the right side of the tool • Avoid burning of the tool.
to get an included angle of 60° on the tool.
• The cutting edge should be visible during grinding.
• Grind 3° to 5° side clearance angle on each side of the
tool.

96 Producltion & Manufacturing : Turner - Exercise 1.3.31