Helical Step Drill
High Performance Drilling
Proprietary step design eliminates delamination and/or burr on exit
Improved hole finish
Can be used in composite and metal stacked materials
Made from solid carbide and coated for optimal tool life
For use in both hand and CNC operations
Helical Step Dril
| Size | D1 | OAL 4'' | OAL 6'' |
|---|---|---|---|
| #40 | 0.0980 | STDRMR0980C0-4 | STDRMR0980C0-6 |
| 1/8 | 0.1250 | STDRMR1250C0-4 | STDRMR1250C0-6 |
| #30 | 0.1285 | STDRMR1285C0-4 | STDRMR1285C0-6 |
| 9/64 | 0.1406 | STDRMR1406C0-4 | STDRMR1406C0-6 |
| 5/32 | 0.1563 | STDRMR1563C0-4 | STDRMR1563C0-6 |
| #21 | 0.1590 | STDRMR1590C0-4 | STDRMR1590C0-6 |
| #20 | 0.1610 | STDRMR1610C0-4 | STDRMR1610C0-6 |
| 11/64 | 0.1719 | STDRMR1719C0-4 | STDRMR1719C0-6 |
| 3/16 | 0.1875 | STDRMR1875C0-4 | STDRMR1875C0-6 |
| #11 | 0.1935 | STDRMR1935C0-4 | STDRMR1935C0-6 |
| #10 | 0.1935 | STDRMR1935C0-4 | STDRMR1935C0-6 |
| #8 | 0.1990 | STDRMR1990C0-4 | STDRMR1990C0-6 |
| #7 | 0.2010 | STDRMR2010C0-4 | STDRMR2010C0-6 |
| 13/64 | 0.2031 | STDRMR2031C0-4 | STDRMR2031C0-6 |
| 7/32 | 0.2188 | STDRMR2188C0-4 | STDRMR2188C0-6 |
| #1 | 0.2280 | STDRMR2280C0-4 | STDRMR2280C0-6 |
| A | 0.2340 | STDRMR2340C0-4 | STDRMR2340C0-6 |
| B | 0.2380 | STDRMR2380C0-4 | STDRMR2380C0-6 |
| 1/4 | 0.2500 | STDRMR2500C0-4 | STDRMR2500C0-6 |
