Material of drill
Type of material to be drilled
Quality of surface finish desired
All of these
1 to 3 m/min
5 to 10 m/min
10 to 14 m/min
14 to 20 m/min
The work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face
The work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face
The work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face
The work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face
V-threads
Whitworth threads
Buttress threads
Acme threads
The diamond is the hardest tool material and can run at cutting speeds about 50 times that of high speed steel tool.
The ceramic tools can be used at cutting speeds 40 times that of high speed steel tools.
The cemented carbide tools can be used at cutting speeds 10 times that of high speed steel tools.
The ceramic tools can withstand temperature upto 600°C only.
Holds and locates a workpiece and guides and controls one or more cutting tools
Holds and locates a workpiece during an inspection or for a manufacturing operation
Is used to check the accuracy of workpiece
All of the above
Distortion
Warping
Porous weld
Poor fusion
Circular interpolation in counter clockwise direction and incremental dimension
Circular interpolation in counter clockwise direction and absolute dimension
Circular interpolation in clockwise direction and incremental dimension
Circular interpolation in clockwise direction and absolute dimension
Mild steel
Copper
Aluminium
Brass
Remain constant
Increases
Decreases
First increases and then decreases
Decreases with increase in gap between the two joining surfaces
Increases with increase in gap between the two joining surfaces
Decreases up to certain gap between the two joining surfaces beyond which it increases
Increases up to certain gap between the two joining surfaces beyond which it decreases
Increase in cutting temperature
Weakening of tool
Friction and cutting forces
All of these
0.20
0.30
0.50
0.60
Morse taper
Seller's taper
Chapman taper
Brown and Sharpe taper
The modulus of elasticity of metal
The shear strength of metal
The bulk modulus of metal
The yield strength of metal
Very high pouring temperature of the metal
Insufficient fluidity of the molten metal
Absorption of gases by the liquid metal
Improper alignment of the mould flasks
10 r.p.m.
20 r.p.m.
120 r.p.m.
180 r.p.m.
Making a cone-shaped enlargement of the end of a hole
Smoothing and squaring the surface around a hole
Sizing and finishing a small diameter hole
Producing a hole by removing metal along the circumference of a hollow cutting tool
Work material
Tool material
Working conditions
Type of chip produced
(4π/6)³ × (r/l)⁶
(4π/6) × (r/l)²
(4π/6)² × (r/l)³
(4π/6)² × (r/l)⁴
Cast iron
Mild steel
Brass
Aluminium
90°
118°
135°
150°
1.02
1.32
1.66
1.82
Cutting forces and power consumption
Tool life
Type of chips and shear angle
All of these
0° to 8°
9° to 15°
16° to 20°
21° to 25°
Using abrasive slurry between the tool and work
Direct contact of tool with the work
Maintaining an electrolyte between the work and tool in a very small gap between the two
Erosion caused by rapidly recurring spark discharges between the tool and work
10 m/min
15 m/min
22 m/min
30 m/min
Straight fluted reamer
Left hand spiral fluted reamer
Right hand spiral fluted reamer
Any one of these
Independent of index change gear ratio
Dependent on speed change gear ratio
Interrelated to index change gear ratio
Independent of speed and index change gear ratio
0°
10°
20°
100°