I am looking at the building a Flywheel based - Fly Cutter.
A few basic criteria are essential.
1. I want to use a common HSS Square tool Bit.
2. Use a standard R8 FMB22 arbor which fits the majority of Mini Mills
Using the Tangential Concept.
The Bit will extend out of the bottom of the flywheel
Angled centre to the out side by 12 degrees
Angled bottom to top by 12 degrees
I want to clamp the square tool bit using a split piece similar to the method used by the Diamond Tool Holder.
I have discussed this with Gary Sneesby of Eccentric Engineering, at length.
Gary suggested I start with what he has used in the past.
Gary’s idea is to use the Diamond Tool Holder in a secondary Jig and form the Fly cutter in that matter.
While the concept does work.
I feel the design has a lot of excess momentum whirling around waiting to fly off and seriously incurs someone.
A Mill is as another wise person has already stated a machine tool looking to cause great bodily harm.
I would like to find someone who can draw what I have in my head (I have ZERO CAD experience )
With proper drawings I may be able to construct a flywheel with the tool bit mounted using part of the flywheel cut and milled to hold the tool in place.
The final assembly can be then turned on a lathe to minimize the Momentum of the assembly.
To finally balance the flywheel holes can be drilled to compensate for the one side off balance.
It will only be a reasonable balance as the tool bit will wear causing loss of material.
If the design can be drawn out correctly my idea is some amateurs may be more willing to attempt the building of it.
Most commercial Fly Cutters I have used do not inspire me with confidence for an amateur Machinist to use.
The big advantage of the Tangential cutter especially for the beginner is he/she only has to learn one simple jig supported sharpening (grinding) process.
With the Diamond Tool holder covering almost 90% of normal beginning lathe work
Coupled with a Flywheel based Diamond Tool Holder for the Mill the initial work with a mill can begun simply and I believe provide a safer work environment for the beginner.
This allow a new amateur machinist to actually make and use a tool that will be simple to maintain allowing them to have confidence in their abilities such as simple sharpening and straight forward lathe turnings and the beginning of facing with the mill.
I hope you can grasp what I am attempting to get across.
If Not I am will to discuss at length the concept further.
If anyone who has CAD abilities and who is willing to work with me I would very much appreciate it.
Thanks for Listening.
The following are the photos Gary Sneesby of Eccentric Engineering sent to me.
The purpose is to illustrate the Tangential Flywheel Fly Cutter concept.
I would like drawing (CAD) assistance to create a stand alone Flywheel Fly Cutter.
As the majority of Mini Mills used by Amateur Machinists I suggest an R8 Arbor as the Mill Holding Tool insert.
An R8 FMB22 as an example as the tool holder for the Flywheel
Gary Sneesby has a professional grade Mill as he is a Machinist by trade.
There are however many mounting that can be used and my concept is to use something most Amateur Machinist can obtain or have in their tool box that will work on their machine.
The other reason for using the R8 based Mill mounting tool is with one screw the Flywheel can be separated from the mounting and only the Flywheel needs to stored when not in use.
1/4 inch Square HSS or Crobalt tool bits are a simple and basic tool bit every machine shop should have.