Types of cutters || Explain different Drill bit || drill bit ke bare me all details || Tooling tips

Types of cutters || Explain different Drill bit || drill bit ke bare me all details || Tooling tips
in this Video you can see introduction of cutting tools & explains about drill bit like angel, material, types etc ....
Steps to Produce Accurate Holes
Center drilling Marking
Drilling Rough Hole making
Boring Enlarging Hole
Reamer Finishing
Taping Thread formation
Drill Construction
A twist drill is made up of three components
Helix angle or Rake Angle :
Angle between Axis of the Drill and the direction of the Flute of the drill.
Type
Helix Angle Range
Purpose
Slow
12? to 22?
Shallow holes
Less lifting power for chips
Regular
28? to 32?
General Purpose
Fast
34? to 38?
Deep holes greater lifting power for chips
Land : The part of the drill body between the flute, It provides torsional strength to the drill. Reducing the land width increases chip space, but reduces strength.
Flute Length = Length from drill point to the end of the flute run out. Flute length determines the maximum depth of drilling
Drill Flutes Land Hardened Straight Shank
Diameter or HSS Body Shank Diameter
Margin
Point angle:
Angle between the flanks of the drill where they coincide.
Chisel Edge Angle
The angle formed between the chisel edge and the cutting lips. The Chisel edge consumes Cutting 60% to 70% of the thrust required! Lips
Lip Relief Angle
Sufficient clearance behind the cutting lips is provided LipAngleClearance so that the cutting edges can enter the work.
Lip Relief Angle
Material
Effects
0? to 9?
For Harder
Requires excess feed pressure, causes drill to split up the web.
90 to 150
For Harder For Soft
Supported to prevent excessive dulling or chipping.
15? to Above
For Soft
Cutting lips to Break down
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#Specification_of_Drill_Bit
#Angles_of_Drill_Bit
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