Ordering Information
Please specify the drill diameter and flute length.
The flute length should equal the hole depth plus 2 x D. This allows for
re-grinding.
If holes are deeper than 30 diameters they should be drilled in 30:1 stages.
The driver size will be fitted according to the chart below.
Drivers
| DRIVER STYLES | REF | TIP DIAMETER | Ød | h | OVERALL LENGTH | |
|---|---|---|---|---|---|---|
 |
VT1 | CA | Ø5.0 - 11.73 | Ø16 | 40 | Flute Length + 50.0 |
| VT2 | CB | Ø11.74 - 20.50 | Ø25 | 50 | Flute Length + 65.0 | |
| VT3 | CC | Ø20.51 - 40.50 | Ø35 | 60 | Flute Length + 80.0 |
Cutting Data
| MATERIAL | SURFACE SPEED Metres |
FEED/REV Ø6.0 |
FEED/REV Ø8.0 |
FEED/REV Ø10.0 |
FEED/REV Ø15.0 |
FEED/REV Ø20.0 |
FEED/REV Ø30.0 |
|---|---|---|---|---|---|---|---|
| High Temp Alloys | 18 | 0.010 | 0.012 | 0.015 | 0.020 | 0.025 | 0.030 |
| Stainless Steel Alloys | 30 | 0.015 | 0.020 | 0.025 | 0.035 | 0.040 | 0.040 |
| High Carbon Steel | 38 | 0.015 | 0.020 | 0.030 | 0.040 | 0.050 | 0.050 |
| Medium Carbon Steel | 45 | 0.020 | 0.030 | 0.040 | 0.050 | 0.060 | 0.060 |
| Low Carbon Steel | 55 | 0.020 | 0.030 | 0.040 | 0.060 | 0.075 | 0.075 |
| Cast Iron | 35 | 0.040 | 0.060 | 0.100 | 0.130 | 0.150 | 0.180 |
| Free Cuttin Alluminium | 75 | 0.040 | 0.060 | 0.100 | 0.130 | 0.150 | 0.180 |
| CLAMPING METHOD |
 |
 |
||
|---|---|---|---|---|
| FACE | HORIZ | VERT | HORIZ | VERT |
| A | +20° | +15° | +22° | +13° |
| B | +19.5° | +20° | +21.5° | +18° |
| C | -15° | +15° | -13° | +16° |
| D | 0° | +25° | 0° | +25° |
| E | -18° | -14° | -20° | -12° |
Note: Good surface finish required on faces A, C and Chamfer.
| DRILL DIA. |
PRIMARY RELIEF |
CHAMFER AT 20° |
|---|---|---|
| Ø5-Ø12 | 0.4 - 0.6 | 0.4 - 0.6 |
| Ø12-Ø25 | 0.6 - 0.8 | 0.6 - 0.8 |
| Ø25-Ø40 | 0.8 - 1.2 | 0.8 - 1.2 |