1. TYC O M INTERNATIONAL
Point Geometry
Basics

2. Chips TYC O M INTERNATIONAL
Functional Defect
Prevents the drill from
cutting cleanly and efficiently
Diameter Magnification
0.0020"-0.0130" 50X
0.0131"-0.0260" 40X
0.0261"-0.0465" 30X
0.0466"-0.1250" 20X
0.1251"-0.1800" 15X
0.1801"-0.2639" 10X

3. Layback TYC O M INTERNATIONAL
Functional Defect
Results in the Center of the
Primary Face Being the Leading
Cutting Edge (Negative Rake).
Diameter Maximum
0.0020"-0.0130" 0.0001"
0.0131"-0.0260" 0.0001"
0.0261"-0.0465" 0.0002"
0.0466"-0.1250" 0.0002"
0.1251"-0.1800" 0.0003"
0.1801"-0.2639" 0.0004"

4. Hook TYC O M INTERNATIONAL
Minor Functional Defect
Extreme Hook Can
Result in Premature Wear
Diameter Maximum
0.0020"-0.0130" 0.0002"
0.0131"-0.0260" 0.0003"
0.0261"-0.0465" 0.0004"
0.0466"-0.1250" 0.0005"
0.1251"-0.1800" 0.0008"
0.1801"-0.2639" 0.0012"

5. Offcenter TYC O M INTERNATIONAL
a
Functional Defect
Can Result in
Non-Concentric Drilling.
Diameter Maximum
0.0020"-0.0130" 0.0002"
b 0.0131"-0.0260" 0.0003"
0.0261"-0.0465" 0.0004"
0.0466"-0.1250" 0.0005"
0.1251"-0.1800" 0.0008"
0.1801"-0.2639" 0.0012"
(a-b)
Offcenter =
2

6. Offset TYC O M INTERNATIONAL
a
Functional Defect
Can Result in
Non-Concentric Drilling.
Diameter Maximum
0.0020"-0.0130" 0.0002"
0.0131"-0.0260" 0.0003"
b 0.0261"-0.0465" 0.0004"
0.0466"-0.1250" 0.0005"
0.1251"-0.1800" 0.0008"
0.1801"-0.2639" 0.0012"
(a-b)
Offset =
2

7. Overlap TYC O M INTERNATIONAL
Moderately Functional Defect
Can Impede the Drill
from Centering Properly
Diameter Maximum
0.0020"-0.0130" 0.0002"
0.0131"-0.0260" 0.0003"
0.0261"-0.0465" 0.0004"
0.0466"-0.1250" 0.0005"
0.1251"-0.1800" 0.0008"
0.1801"-0.2639" 0.0012"

8. Gap TYC O M INTERNATIONAL
Non-Functional Condition
Diameter Maximum
0.0020"-0.0130" 0.0002"
0.0131"-0.0260" 0.0003"
0.0261"-0.0465" 0.0004"
0.0466"-0.1250" 0.0005"
0.1251"-0.1800" 0.0008"
0.1801"-0.2639" 0.0012"

9. Negative TYC O M INTERNATIONAL
Non-Functional Condition
Diameter Maximum
0.0020"-0.0130" 1deg
0.0131"-0.0260" 1deg
0.0261"-0.0465" 1deg
0.0466"-0.1250" 2deg
0.1251"-0.1800" 2deg
0.1801"-0.2639" 2deg

10. Flare TYC O M INTERNATIONAL
Non-Functional Condition
Diameter Maximum
0.0020"-0.0130" 2deg
0.0131"-0.0260" 3deg
0.0261"-0.0465" 4deg
0.0466"-0.1250" 4deg
0.1251"-0.1800" 5deg
0.1801"-0.2639" 6deg

11. TYC O M INTERNATIONAL
Optimum
Point
Geometry