
Helical Interpolation Min. Hole Diameter from solid = 1,43 x Dia. cutter Max. Hole Diameter from solid = 1,95 x (Dia. cutter - radius) Max. Dia. Max. Dia. Max. Enlargement Diameter = Hole size + ((Dia. cutter - radius) x 2) Min. Dia.
Helical Ramping Angle Calculation: The ramping angle is dependent on size of hole, and the material being machined. Maximum Depth of Cut Calculation
| Ma | terial | ap | (doc),max | ||
| P | Unalloyed Steel / Alloyed Steel | 0,05 | 0,1 | x Dia. | |
| M | Stainless Steel | 0,05 | 0,08 | x Dia. | |
| K | Cast Iron | 0,08 | 0,10 | x Dia. | |
| N | Aluminum | 0,20 | x Dia. | ||
| S | Inconel | 0,03 | x Dia. | ||
| Titanium | 0,07 | x Dia. |
Example: XER 100NN4-C, machining a hole 18,53mm on Titanium Alloy. Max depth of cut = 0,07 X 10,00
Ramping angle = tan-1 18,53 x π
= 0,70°
Drilling Trochoidal Milling
Feed Correction Capacity End Mill Slot Width Number of Flutes Drilling Diameter (D) Min
| 2 | 0,5 x fz | 1,00 - 6,00 | 1,43 D |
| 3 | 0,1 x fz | 8,00 - 12,00 | 1,43 D |
| 4 | N/A | 16,00 - 20,00 | 1,43 D |