Subject: Re: Ball Turning kit: Was: quorn apology

From: [email-masked] (Andy Dingley)
Date: Sun, 21 Jul 1996 20:15:48 GMT

The moving finger of Paul Schiller <[email-masked]> having written:

>attatch a hand wheel and dial to the lathe lead screw. 
>Sounds like a nice thing to have anyway.  

These are a popular option on Myford 7s. If you have one, I'd make the
"handle" on the handwheel removable, or remove it permanently. We're
not all the neatest of workers and this rotating hook on the end of
your leadscrew is just a little too likely to catch on things for my
taste.

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From: [email-masked] (Andy Dingley)
Date: Sun, 21 Jul 1996 20:15:50 GMT

The moving finger of [email-masked] (Ron Ginger) having
written:

>Why make ball handles at all

The Quorn is popular in the UK as a model engineering competition
entry and demonstration of one's skill in making ball handles. Of all
the Quorns that you see, I've rarely seen one that looked as if it was
ever used.

If you want a cheap toolpost grinder, get the workshop space for a
surplus industrial one. If you want to make a small one, build a Quorn
with Allens. If you want to grace the pages of ME, spend your life
turning ball handles.

(and don't get me onto those bloody steam trains....)

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From: [email-masked] (Ron Ginger)
Date: Sun, 21 Jul 1996 21:29:17 LOCAL

In article <[email-masked]> [email-masked] (Andy Dingley) writes:
>From: [email-masked] (Andy Dingley)
>Subject: Re: Ball Turning kit:  Was:  quorn apology
>Date: Sun, 21 Jul 1996 20:15:50 GMT

>with Allens. If you want to grace the pages of ME, spend your life

WOW- and I thought Id get in trouble for such heresey, and here we have an 
actual UK person suggesting you could make a useable tool without ball handles.

Ron Ginger
my signature is http://www.ultranet.com/~ginger

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From: [email-masked] (Greg Lewis)
Date: 22 Jul 1996 19:53:37 -0700

In article <[email-masked]>,
Kevin J. Hansen <[email-masked]> wrote:
>Lautard's method works great, though it took me a couple of times 
>through the description to grasp what he was up to.  I then did an Excel 
>spreadsheet to do the calculations, which sped things up considerably.
>
>Lautard also somewhere suggests silver soldering ball bearings to the 
>handle shaft as a quicker alternative...  I haven't tried this, but I'm 
>sure it would be very satisfactory.
>
>Kevin

If all you're doing are handles, then the balls don't need to be
perfect spheres. Therefore, see the April issue of Modeltec, p. 15 for
a quick and dirty metohd. Briefly, turn up the shaft and leave a
section on the end the diameter and length of the ball diameter. Then
mark off from each end of this cylinder a line roughly *a fat 1/4 or a
skinny 1/3 of the ball's diameter (.293 times the diameter, to be
exact).* [quoting from the article]

Then swing the compound around to 45 degrees and cut across the edge
of the cylinder until your cut comes down to the scribed line. After
that it's a simple matter to file off the remainder. 

I've tried this and it works. Takes much less time to do than to write
or read about.

___________________________________________________________________
[email-masked]      	   	     They don't
Photojournalism sequence      	   	     Call this place
Department of Mass Communication   	     An institution
     and Journalism 	      	   	     For nothing
CSU Fresno, Fresno, CA 93740-0010

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From: Mike Rehmus <[email-masked]>
Date: 24 Jul 1996 23:39:13 GMT

I noticed in the next to last edition of Model Engineer's Workshop
that the Quorn in the picture had only 1/2 the ball handles
because the builder stated that, "they tended to get in the way."

His Quorn looked well used.

Best,

Mike Rehmus