Sr. No
|
Problems |
Reasons |
Remedies |
| 1 |
Over Size Hole |
Lip angles are not equal. Lip Lengths unequal. |
Regrinding the Drill point to correct lip angle with proper relief, marinating Lip lengths equal |
| 2 |
Buckling of theDril |
Drill deflects axially |
Use Correct Guide Bush |
| 3 |
Drill Chattering |
Hard, Tough work Piece, Torsion deflection of the Drill |
Increase Torsion Stiffness by replacing thicker Web Drill. Reduce Drill Length and Shorten flute Length. |
| 4 |
Drill Breaking |
Fixture not rigid, Web Thickness more, Speed and Feed not Proper |
Use Rigid Fixture, Web Thinning to be implemented, Use proper speed and feed according to work material |
| 5 |
Drill Breaking in deep hole Drilling |
Chips blocking in Flutes, No informed back Taper, Drill Run out on OD |
Use Wood Packing System Before using check uniform back taper and concentricity |
| 6 |
Drill Rubbing |
No proper relief on Point, No uniform back Taper |
Regrind point with proper point relief, Check uniform Back Taper, add no point negative back Taper should occur on Drill Diameter. |
| 7 |
Heat Generation while Drilling |
Coolant insufficient Proper. Coolant not used, Work Piece is hard. |
Use Proper Coolant flow. Use Proper Coolant. Select Drill with Correct Geometry for the material |
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