Re: [CAD_CAM_EDM_DRO] Gorton mill

Jeff Barlow wrote:

>
>
> So, what's your take on the idea of a do-it-yourself new
> spindle or adapter of some kind? It sounds like you've been
> there. I'm just trying to understand how far in over my head
> I'd be getting. Words like "grind and lap the taper" do
> scare me a bit, but I do sort of enjoy not knowing what I'm
> doing.

A new spindle is alway a risk....you have to decide how much time, energy and money you want to put into this mill.
If the spindle bearings are rusted or gone then there is significant money involved in replacing them and getting the preload right
again. I like the idea of mounting a spindle + front bearing in a lathe with the bearing in a steady rest. Dial it in and then go to
work. You can set your compound with a dial indicator and a real taper....R8 or whatever you are going to use.

My spindle dia is 2.625 with a 2.125-16 thread to screw on the collar to hold the toolholders...still not too stiff. It (almost )
takes a ER40 collet. :-(
Even though I don't like R8 it does have the advantage of lots of available tooling. Large dia. stuff simply hangs out too far in
front of the bearing..

>
> I have here before me the (5/32") collet that was in it.
> It's about 2-1/2" long, 1" across the face, the taper is
> about 1" long, the shank is 1-1/2" long and about 5/8" OD,
> with three flats. The threads for the drawbar look like
> about 7/16". (I'm using a plastic ruler, my mike is at
> home.) I would guess the OD of the spindle to be about
> 1-1/8".

I simply don't have the experience to put names on all the toolholder standards out there. Hopefully one of the experts on the list
will have an idea.

> Anyone have any ideas for a magic R8 conversion for it?

Not much magic....just lots of work.


dave

>
>

>
> Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the discussion of shop built systems, for CAD, CAM, EDM, and DRO.
>
> Addresses:
> Post message: CAD_CAM_EDM_DRO@egroups.com
> Subscribe: CAD_CAM_EDM_DRO-subscribe@egroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@egroups.com
> List owner: CAD_CAM_EDM_DRO-owner@egroups.com, wanliker@...
> Moderator: jmelson@... [Moderator]
> URL to this page: http://www.egroups.com/group/CAD_CAM_EDM_DRO
> FAQ: http://www.ktmarketing.com/faq.html
> bill,
> List Manager