The drill is drilled with a indexable drill

Consider the following. The EHWT has a 5.5-inch diameter hole, mounted on a plate about 4 inches thick, and runs at a 15-horsepower vertical machining center with 40 conical shafts. The machine can reach 1.125 diameter indexable drill without stopping. As EHWT sees, it has four options:

The drill is drilled with a indexable drill, and then the circular interpolation is carried out with the indexable end milling cutter. This process will be difficult because of the length of the tool required and the radial cutting force involved. Significant deviations are inevitable. In order to avoid severe flutter and hole size too small, it must be cut with the end milling cutter. The approximate period is 60 to 90 minutes.

Drill into a relocable rig and then use multiple boring rods to increase one diameter at a time. This process will produce a straight and accurate hole, but it will take time. It will also be expensive and will make it more difficult to evacuate the chips. The approximate period is 45 to 60 minutes.

Heavy round interpolation with spiral milling cutter. This method will consume a lot of horsepower and will probably not cause damage to the size of the machine.

Screw interpolation – with or without initial drilling. For this application, a 3-inch diameter indexable milling cutter works well from the start. Drilling before drilling will help to evacuate the chips, but this is not a necessary condition for success. Depending on the style of the tool used, it takes about 65 or 200 times to break through this section. While this may sound like a lot of cutting, the actual cycle time is relatively short. The approximate period is 10 to 22 minutes. Using Felix, this process can be executed with a cutting tool and runs within 5 to 10 minutes of a cycle.

Operating instruction

end mill for stainless steel