[modeleng] Re: Screwcutting
- From: "Ron Head" <ron.head@xxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Sat, 24 Nov 2007 11:49:28 -0000
Hi Patrick
The retractable toolholder is a nifty device, but the only benefit seems to
be that you don't have to remember the tool setting at each pass. You still
have to be quick to disengage the leadscrew at the end of the cut.
When I'm screwcutting, I like to make an undercut at the end of the thread,
for the tool to run into. I also run the lathe at a fairly slow speed, to
give me sufficient reaction time!
Which brings me onto one of my big grumbles with the Myford lathe. The
leadscrew engagement lever is on the left of the saddle, which means that
when you are holding the lever and getting ready to disengage, you have to
put up with hot swarf bouncing off the back of your hand! Why they couldn't
put it on the right, I'll never know.
Regards
Ron
----- Original Message -----
From: "Patrick Coppens" <develop@xxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Saturday, November 24, 2007 9:19 AM
Subject: [modeleng] Re: Screwcutting
> I find, that one of those retractable tool setups, an invaluable aid.
> I saw the principle on the "Hemingway Kits" website.
> http://www.hemingwaykits.com/acatalog/Retracting_Tool_Holder.html
> The principle is almost silly in its conception!
> I have "improvised" one to try it out, and now, it is on my to do list
> to make
> a proper one, by next spring. It is especially helpful on the more
> economical lathes, where
> a dead stop system is difficult or impossible to use.
>
> It is a project, that can be adapted for all lathes, and will help anybody
> to overcome the fear, of not being fast enough, in retracting the
> cutting tool, and thus creating
> bedlam, if the cutting tip, digs itself in the chuck!
>
> Patrick
> Flanders
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