Home made insert flycutter

[DaveH]

(05-10-2012, 04:58 AM)Dave J Wrote: Hi Dave,
Nice work, I just have one question about the last picture. I looks like the fly cutter is on an angle to the work, was your mill not trammed?
Dave

The cutter is just resting on the work piece, neither the work piece or the fly cutter is on the mill.
I did the photo that way to show how far the insert protrudes out from the bottom of the holder

DaveH

[PixMan]

Forgive my ignorance, but I don't understand the part about turning the chuck by hand to thread the parts.

I can understand the lack of a brake, but it seems you don't need one if you simply use the lathe's half nut to engage and disengage when threading. This would allow you to completely finish the thread using the threading insert.

Most thread cutting dies aren't set to any standard, or they may have been adjusted by someone else. You should always be measuring external threads, or at the very least make test fits with the mating part. There's nothing worse than spending a lot of time making a part, starting the thread, and only then discover that the die had been adjusted to a size that makes for a very loose thread. Now you may not know if the die cut undersize or the tap cut oversize.

Of course it all worked well and the tool looks and works fine. Well done!

[DaveH]

Hi Ken,

Yeah, you're right I could just have disengaged the half nuts, just a habit of leaving them engaged I suppose

I just wanted a "fine'ish" thread that one was closest to hand, and really just needs to screw on. I put a register on but really wasn't needed because I "trued" it all up on the lathe when the two parts were screwed together.

That particular die is a split one and I had just been using it so I knew it would screw okay into the taped hole.

DaveH