Do you use them? I have two sizes, the 7mm and the 10mm for the use with Sierra's. I can make a full pass thru acrylic pen blanks using a speed of 1000rpm, thou if i need to do two halves i reduce the speed to 800rpm and let the tool cool down a little as the acrylic will stick to the drill when over heating.
They are a very good drill and well worth the cost in my opinion.
The 10mm bit, the length of the drill is 150 mm
View attachment 42
They are a very good drill and well worth the cost in my opinion.
The 10mm bit, the length of the drill is 150 mm
View attachment 42