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Old May 07, 2005, 04:11 PM
Joules
Guest
n/a Posts
Myford Super 7 Metric conversion kit

Hi,
anyone have a ball park figure for the cost of this... Otherwise
do I look at a cheap metric mini lathe. I need to make some camera
parts and adapters, not sure if the metric set for the Myford will be
affordable...


Cheers

Joules
Old May 07, 2005, 04:11 PM
Bob Minchin
Guest
n/a Posts
Re: Myford Super 7 Metric conversion kit


Joules wrote in message ...
>Hi,
> anyone have a ball park figure for the cost of this... Otherwise
>do I look at a cheap metric mini lathe. I need to make some camera
>parts and adapters, not sure if the metric set for the Myford will be
>affordable...
>
>
> Cheers
>
> Joules


Cheapest way of doing this is to pickup a 63 or a 127 tooth changewheel for
the thread conversion and keep the half nuts engaged when screw cutting.
Changing lead and feed screws/nuts will be pricey - easier to convert your
drawings to imperial units.

Bob


Old May 07, 2005, 04:11 PM
John Stevenson
Guest
n/a Posts
Re: Myford Super 7 Metric conversion kit

On Sat, 07 May 2005 19:52:50 GMT, Joules <jenesisjoules@tesco.net>
wrote:

>Hi,
> anyone have a ball park figure for the cost of this... Otherwise
>do I look at a cheap metric mini lathe. I need to make some camera
>parts and adapters, not sure if the metric set for the Myford will be
>affordable...
>
>
> Cheers
>
> Joules


Presumably this is for a Super 7 with gearbox.
There are affordable options just need more info.

--
Regards,

John Stevenson
Nottingham, England.

Visit the new Model Engineering adverts page at:-
http://www.homeworkshop.org.uk/
Old May 07, 2005, 04:11 PM
Joules
Guest
n/a Posts
Re: Myford Super 7 Metric conversion kit


Yep this machine has a gearbox, I just looked at the kit of parts shown
in the back of my Myford manual, and thought Gosh, bet that costs a
pretty penny.

On the option of changing the drawing, not an option, some parts need to
be metric in order to fit existing equipment.

Joules
Old May 07, 2005, 06:11 PM
John Stevenson
Guest
n/a Posts
Re: Myford Super 7 Metric conversion kit

On Sat, 07 May 2005 20:32:25 GMT, Joules <jenesisjoules@tesco.net>
wrote:

>
>Yep this machine has a gearbox, I just looked at the kit of parts shown
>in the back of my Myford manual, and thought Gosh, bet that costs a
>pretty penny.
>
>On the option of changing the drawing, not an option, some parts need to
>be metric in order to fit existing equipment.
>
> Joules


Right, whatever happens then you will need a new quadrant as the one
you have fitted has fixed centre's.
You will need the quadrant #234 Myford part number A2469 plus some
extra gears.
Two ways once you have this quadrant.

One is buy a 127 gear plus a few extra's to suit the pitches you need
and leave the box in 8TPI

Second is buy the whole setup from Myfords at a cost of 192.62 if
they have them in stock.
You may have to wait whilst they nip down to the local beeroff for a
shilling for the meter.


--
Regards,

John Stevenson
Nottingham, England.

Visit the new Model Engineering adverts page at:-
http://www.homeworkshop.org.uk/
Old May 07, 2005, 06:11 PM
Bob Minchin
Guest
n/a Posts
Re: Myford Super 7 Metric conversion kit


Joules wrote in message ...
>
>Yep this machine has a gearbox, I just looked at the kit of parts shown
>in the back of my Myford manual, and thought Gosh, bet that costs a
>pretty penny.
>
>On the option of changing the drawing, not an option, some parts need to
>be metric in order to fit existing equipment.
>
> Joules



Changing the units on a drawing does not change the size of the finished
item - or at least not when I do it.

I guess with a handle like "Joules" you will be of the metric persuasion!

Bob


Old May 07, 2005, 06:11 PM
jontom_1uk@hotmail.com
Guest
n/a Posts
Re: Myford Super 7 Metric conversion kit

> Joules wrote in message ...
> >
> >Yep this machine has a gearbox, I just looked at the kit of parts

shown
> >in the back of my Myford manual, and thought Gosh, bet that costs a
> >pretty penny.
> >
> >On the option of changing the drawing, not an option, some parts

need to
> >be metric in order to fit existing equipment.
> >
> > Joules

>
>



I bought a metric conversion set for my Super 7 a few weeks ago from
RDG Tools, I notice they are not listing them at the moment but might
be worth asking if they have any left. Although the finish is not up to
Myford standards it works fine and was a good bit less than half the
Myford cost. No connection etc just an impoverished paying customer.

Best regards Keith

Old May 07, 2005, 06:11 PM
Mike H
Guest
n/a Posts
Re: Myford Super 7 Metric conversion kit

In message <e79fe.18061$wu2.7913@newsfe1-gui.ntli.net>, Bob Minchin
<bob.minchin@OEnewsreader.com> writes
>Cheapest way of doing this is to pickup a 63 or a 127 tooth changewheel for
>the thread conversion and keep the half nuts engaged when screw cutting.
>Changing lead and feed screws/nuts will be pricey - easier to convert your
>drawings to imperial units.

For camera parts I would go for the greater accuracy of conversion
factor given by a 127 tooth wheel (127 x 2 = 254 and 25.4mm = 1").
Conversion change wheel tables have been published in past issues of
both Model Engineer and Engineering in Miniature. Alternatively, if you
are of the appropriate turn of mind, you could work out the ones you
need with any spread sheet program on the PC.

--
Mike Hopkins
CSME <http://goto/cheltsme>
Old May 08, 2005, 12:11 PM
Marvin W. Klotz
Guest
n/a Posts
Re: Myford Super 7 Metric conversion kit

On Sat, 7 May 2005 23:08:58 +0100, Mike H
<newsreader@ada-augusta.INVALID.demon.co.uk> wrote:

>In message <e79fe.18061$wu2.7913@newsfe1-gui.ntli.net>, Bob Minchin
><bob.minchin@OEnewsreader.com> writes
>>Cheapest way of doing this is to pickup a 63 or a 127 tooth changewheel for
>>the thread conversion and keep the half nuts engaged when screw cutting.
>>Changing lead and feed screws/nuts will be pricey - easier to convert your
>>drawings to imperial units.

>For camera parts I would go for the greater accuracy of conversion
>factor given by a 127 tooth wheel (127 x 2 = 254 and 25.4mm = 1").
>Conversion change wheel tables have been published in past issues of
>both Model Engineer and Engineering in Miniature. Alternatively, if you
>are of the appropriate turn of mind, you could work out the ones you
>need with any spread sheet program on the PC.
>
>--
>Mike Hopkins
>CSME <http://goto/cheltsme>


There's a program on my web page already set up to do this. A partial list of
results from that program...

Desired ratio = 1.27

47:37 => 1.270270 (0.021281%) **
80:63 => 1.269841 (-0.012498%) **

where the number in parentheses is the error in percent.

Much smaller errors can be had by using two gear pairs...

Desired ratio = 1.27

30:23 - 37:38 => 1.270023 (0.001802%) **

The programs can be downloaded freely. They're all in the GEARFIND.ZIP
archive.

Regards, Marv

Home Shop Freeware - Tools for People Who Build Things
http://www.geocities.com/mklotz.geo

Old May 08, 2005, 08:11 PM
speedy
Guest
n/a Posts
Re: Myford Super 7 Metric conversion kit


<jontom_1uk@hotmail.com> wrote in message
news:1115503096.455494.161210@g14g2000cwa.googlegr oups.com...
> > Joules wrote in message ...
> > >
> > >Yep this machine has a gearbox, I just looked at the kit of parts

> shown
> > >in the back of my Myford manual, and thought Gosh, bet that costs a
> > >pretty penny.
> > >
> > >On the option of changing the drawing, not an option, some parts

> need to
> > >be metric in order to fit existing equipment.
> > >
> > > Joules

> >
> >

>
>
> I bought a metric conversion set for my Super 7 a few weeks ago from
> RDG Tools, I notice they are not listing them at the moment but might
> be worth asking if they have any left. Although the finish is not up to
> Myford standards it works fine and was a good bit less than half the
> Myford cost. No connection etc just an impoverished paying customer.
>
> Best regards Keith


Would this work with an ML7 with gearbox?

Dave.


Old May 08, 2005, 08:11 PM
John Stevenson
Guest
n/a Posts
Re: Myford Super 7 Metric conversion kit

On Sun, 8 May 2005 23:24:16 +0000 (UTC), "speedy"
<sparks68@btinternet.com> wrote:

>
><jontom_1uk@hotmail.com> wrote in message
>news:1115503096.455494.161210@g14g2000cwa.googleg roups.com...
>> > Joules wrote in message ...
>> > >
>> > >Yep this machine has a gearbox, I just looked at the kit of parts

>> shown
>> > >in the back of my Myford manual, and thought Gosh, bet that costs a
>> > >pretty penny.
>> > >
>> > >On the option of changing the drawing, not an option, some parts

>> need to
>> > >be metric in order to fit existing equipment.
>> > >
>> > > Joules
>> >
>> >

>>
>>
>> I bought a metric conversion set for my Super 7 a few weeks ago from
>> RDG Tools, I notice they are not listing them at the moment but might
>> be worth asking if they have any left. Although the finish is not up to
>> Myford standards it works fine and was a good bit less than half the
>> Myford cost. No connection etc just an impoverished paying customer.
>>
>> Best regards Keith

>
>Would this work with an ML7 with gearbox?
>
>Dave.
>


Yes.
Same gearbox.
--
Regards,

John Stevenson
Nottingham, England.

Visit the new Model Engineering adverts page at:-
http://www.homeworkshop.org.uk/
 


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