[modeleng] Re: Taper Turning Attachment
- From: "Shep" <shep.28@xxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Mon, 7 Apr 2008 21:01:32 +0100
Hi Chris
Thanks for this information. Good luck with building your Myford
Attachment.
I have removed all the gunge from the South Bend Attachment, and came to the
same conclusion - that it covered the length of the bed, without having to
have an enormous fixture.
I have compared it with a South Bend Catalogue (which I acquired when I was
at school in about 1944!) and I note that the device is secured to the
saddle (rather than the usual method of securing to the back of the bed).
It is immobilised by a bracket which is attached to the rear rib of the bed.
This means that the whole attachment moves with the saddle and only the
immobilising bracket needs to be moved when a different position is
desired.. Hence the second, parallel slide.
It would be very difficult to bolt it on to the Harding saddle, but as the
Hardinge has a tee slot running the whole length of the back of the bed, it
is easily moved to any bed position. If I am able to secure it in this
manner, I will have to immobilise the bottom slide. The next step is to
make measurements and see if it will fit on the Hardinge in this manner.
Used Hardinge attachments are readily available, but one needs to take out
a mortgage to afford them. I was delighted to find that Myford
change-wheels fit on the Hardinge
(same bore, same keyway and almost the same DP). So I sold the 10 Hardinge
wheels I got with the machine and this financed the 35 odd Myford change
wheels. They work fine!
Cheers! Hubert
----- Original Message -----
From: "Chris Crosskey" <chris.crosskey@xxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Monday, April 07, 2008 5:16 PM
Subject: [modeleng] Re: Taper Turning Attachment
> Hi Shep,
> I've got a kit built (well, part built) similar one that I'm planning on
> fitting to my Myford once it's been bodged a bit more.... The idea is
> that you can have a taper turning attachment that covers the full length
> of the bed without needing either an enormous fixture covering the whole
> bed or needing to remove and refit a smaller fixture (like the standard
> Myford one).... I want to put screw vernier adjusters on mine, though
> it's possible looking at the way that mine is made that the upper piece
> can be made easily removeable in which case mine will have the screw
> vernier and a couple of patterns made, one for 2MT and one for 1 3/8
> non-stick (so I can knock out bits for my mill)
>
> Also I've seen one on a Harrison at college that had a copying
> attachment that ran off the parallel bedway.... It even had a repetition
> capstan and stops on it.....
>
> chrisc
>
>> -----Original Message-----
>> From: modeleng-bounce@xxxxxxxxxxxxx
> [mailto:modeleng-bounce@xxxxxxxxxxxxx]
>> On Behalf Of Shep
>> Sent: 06 April 2008 17:18
>> To: Modeleng
>> Subject: [modeleng] Taper Turning Attachment
>>
>> Me again!
>> I drove to nearby Bletchley on Friday (the home of Bletchley Park,
> where
>> the German Enigma code was broken and Colossus, the first programmable
>> digital computer was built) to pick up a taper turning attachment
> taken
>> from a South Bend Heavy 10 lathe, being broken for parts. The cost
> of
>> this was negligible, but it was difficult to gauge the condition, as
> it
>> was heavily encrusted with gunge. My theory is that I can adapt it
> to
>> fit my Hardinge lathe (which in American parlance is an 11" lathe).
>>
>> I have soaked it in paraffin/kerosene and most of the gunge has
>> disappeared, revealing a near-pristine condition (except for a few
>> cosmetic hacksaw scars, made by someone hacksawing in the chuck!). I
>> think that this attachment has rarely been used - unlike the lathe
> which
>> is a wreck!
>>
>> I am slightly puzzled by the mechanism, which has two slides, the
> lower
>> one parallel to the bed, and the upper one, with the normal facility
> for
>> setting to an angle. All previous versions I have encountered do
> not
>> have the lower slide. Any old South Bend operators remember the
> purpose
>> of this lower slide?
>>
>> Any ideas will be welcomed!
>>
>> Cheers Hubert
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