High-Feed Hole Helixing Guidelines – Double-Sided Insert Platform
Minimum & Maximum Hole Sizes for High-Feed Helical Interpolation
VAPOR™ high-feed milling cutters with double-sided inserts make large-diameter hole making quick and easy when leveraging helical interpolation. This technique resembles thread milling in that all three axes (X, Y and Z) are in motion simultaneously. It differs in that the tool is introduced into the material without a start hole. Simply position the tool at the inside diameter of the hole to begin its helix from there, achieving complete material removal by ramping down to the final depth.
This smooth operation tends to eliminate the high horsepower consumption characteristic of large-diameter hole making. It also allows you to generate different hole sizes with a single tool. Hole size variation is all in the programming. A list of recommended minimum and maximum hole sizes is listed below for each VAPOR™ cutter.
Chip evacuation is your #1 challenge when helixing holes. An ample supply of air pressure is recommended for both chip evacuation and for cooling – preferably from multiple air lines. Extremely deep thru-holes machined on a VMC may need to be approached from both ends of the hole in order to facilitate chip evacuation. In cases where chips are problematic, consider reducing the pitch of the helix in order to reduce chip volume, making the cut lighter and easier to flush out.
For more information on how helical interpolation can improve your manufacturing efficiency, contact your Dapra Applications Specialist.
End Mills
| EDP | Description | Tool Dia. | Min. Hole Size | Max. Hole Size |
|---|---|---|---|---|
| 72000 | DTMEM050-150-R2-1C | 0.500" | 0.660" | 1.000" |
| 72005 | DTMEM050-250-R2-1C | 0.500" | 0.660" | 1.000" |
| 72010 | DTMEM063-200-R2-2C | 0.625" | 0.910" | 1.250" |
| 72015 | DTMEM063-300-R2-2C | 0.625" | 0.910" | 1.250" |
| 72020 | DTMEM075-200-R2-3C | 0.750" | 1.160" | 1.500" |
| 72025 | DTMEM075-300-R2-3C | 0.750" | 1.160" | 1.500" |
| 72030 | DTMEM100-250-R2-4C | 1.000" | 1.660" | 2.000" |
| 72040 | DTMEM100-250-R2-5C | 1.000" | 1.660" | 2.000" |
| 72045 | DTMEM100-450-R2-5C | 1.000" | 1.660" | 2.000" |
| 72050 | DTMEM125-300-R2-5C | 1.250" | 2.160" | 2.500" |
| 72060 | DTMEM150-350-R2-6C | 1.500" | 2.660" | 3.000" |
| 72065 | DTMEM150-550-R2-6C | 1.500" | 2.660" | 3.000" |
Shell Mills
| EDP | Description | Tool Dia. | Min. Hole Size | Max. Hole Size |
|---|---|---|---|---|
| 72100 | DTMSM150-050-R2-6C | 1.500" | 2.660" | 3.000" |
| 72105 | DTMSM200-075-R2-7C | 2.000" | 3.660" | 4.000" |
Modular Heads
| EDP | Description | Tool Dia. | Min. Hole Size | Max. Hole Size |
|---|---|---|---|---|
| 72200 | DTMEM075-MOD-R2-3C | 0.750" | 1.160" | 1.500" |
| 72205 | DTMEM100-MOD-R2-4C | 1.000" | 1.660" | 2.000" |
| 72206 | DTMEM100-MOD-R2-5C | 1.000" | 1.660" | 2.000" |
| 72210 | DTMEM125-MOD-R2-5C | 1.250" | 2.160" | 2.500" |