Hello, long newbie questions

Hello, my first post regarding my first lathe..
Managed eventually after many failed attempts at buying a lathe to get a
Myford M Type
Picked it up Sunday, chap even knocked the price down when I got there :-)

It came with a selection of gears, tools, chucks etc

Managed to get it installed and gave it all a good clean and it is
bearing signs of many years neglect and abuse

The lead screw half nut mech is very vague and stripping the half nut of
the lower has revealed that it is very worn and IIRC looked like it has
tried to cross thread at some point
I have joined the Drummond yahoo group and had a look in the files
section where there is a set of diagrams for creating a bolt on half nut
to the casting making subsequent replacement trivial

I am certainly in no hurry to get screw threading as I am a novice and
realize that there is plenty to get my head round before I will require
this feature (not used a lathe since school - which was many many years ago)

I have pondered as to whether it would be possible and easiest to remove
the casting, clean up where the threads were and silver solder some
material (maybe using tube) and have it re threaded and then mill the
top half of the tube away leaving a fresh new half nut?

Can anyone see any problems attempting this?

The bit above the half nut, is this also supposed to be threaded or just
a pad to support the pressure of the half nut when engaged?
This "pad" bit is bolted through an vertically elongated hole in the
carriage, I'm guessing to make it adjustable? does anyone have any info
regarding how to set this up correctly?
could it be that mine is just mal adjusted as the half nut does have
threads , just thinner than the screw's and not square (gone pointy)

Also the tail stock is a morse taper, but which one? (M1 and M2 seem to
be common sizes quoted for Myford parts on the bay of e)
If I take the chuck off and try and fit the morse attachments I have
into it they "seem" to fit but not as nicely as they do in the tail
stock,though I didn't try and clean it out before trying so could be
traces of swarf and hammerite that seems to have been liberally spilled
everywhere, good job they didn't attempt to de grease before doing this
as it seems to be coming off easy enough
(are they supposed to have an internal morse taper here? again which
sort should it be?)

Thanks in advance
Apologies for the long first post and if I have used the wrong
terminology, I am a newbie and enjoying the learning curve so far...and
perhaps still a little too enthusiastic in finding out about this machine

Regards
Rob

On 25 Jul, 20:01, Rob <r...@home.co.k> wrote:
> Hello, my first post regarding my first lathe..
> Managed eventually after many failed attempts at buying a lathe to get a
> Myford M Type
> Picked it up Sunday, chap even knocked the price down when I got there :-)
>
> It came with a selection of gears, tools, chucks etc
>
> Managed to get it installed and gave it all a good clean and it is
> bearing signs of many years neglect and abuse
>
> The lead screw half nut mech is very vague and stripping the half nut of
> the lower has revealed that it is very worn and IIRC looked like it has
> tried to cross thread at some point
> I have joined the Drummond yahoo group and had a look in the files
> section where there is a set of diagrams for creating a bolt on half nut
> to the casting making subsequent replacement trivial
>
> I am certainly in no hurry to get screw threading as I am a novice and
> realize that there is plenty to get my head round before I will require
> this feature (not used a lathe since school - which was many many years ago)
>
> I have pondered as to whether it would be possible and easiest to remove
> the casting, clean up where the threads were and silver solder some
> material (maybe using tube) and have it re threaded and then mill the
> top half of the tube away leaving a fresh new half nut?
>
> Can anyone see any problems attempting this?
>
> The bit above the half nut, is this also supposed to be threaded or just
> a pad to support the pressure of the half nut when engaged?
> This "pad" bit is bolted through an vertically elongated hole in the
> carriage, I'm guessing to make it adjustable? does anyone have any info
> regarding how to set this up correctly?
> could it be that mine is just mal adjusted as the half nut does have
> threads , just thinner than the screw's and not square (gone pointy)
>
> Also the tail stock is a morse taper, but which one? (M1 and M2 seem to
> be common sizes quoted for Myford parts on the bay of e)
> If I take the chuck off and try and fit the morse attachments I have
> into it they "seem" to fit but not as nicely as they do in the tail
> stock,though I didn't try and clean it out before trying so could be
> traces of swarf and hammerite that seems to have been liberally spilled
> everywhere, good job they didn't attempt to de grease before doing this
> as it seems to be coming off easy enough
> (are they supposed to have an internal morse taper here? again which
> sort should it be?)
>
> Thanks in advance
> Apologies for the long first post and if I have used the wrong
> terminology, I am a newbie and enjoying the learning curve so far...and
> perhaps still a little too enthusiastic in finding out about this machine
>
> Regards
> Rob

I assume someone has pointed you to tonys site: www.lathes.co.uk where
you'll probably find some answers to your machine specific questions.
I would think that both the tailstock and the head stock will have a
morse taper, tho not ness the same one, often the headstock is 1
larger.

Dave

Cheers Dave,
Yep lathes.co.uk bookmarked and partly my guide in choosing the Myford
in the first place, a mine of info on there
I only came across it as I had just missed a Smart and Brown (M) just
down the road that went for £100 the day before I found out about it
being for sale!!
The poor thing had been sat out in the rain for a week, had boxes of
collets and what seemed to be a very comprehensive set of chucks/tools
and "stuff" in the cupboards so did a google search to see what I had
just missed...

mine seems to be on pg13 of the Drummond section, the one in the middle
of the page sat on its cast stand

I did email Myford regarding trying to get a direct replacement for the
half nut, and it looks like I'm out of luck by a few tens of years :-)

I did spot a NEW leadscrew and half nut on lathes.co.uk , but the price
is roughly double what I paid for the machine in the first place ;-) and
is kind of out of my league
Happy to have a clunker to learn on for now

Perhaps the morse being slightly bigger in the head compared to the
tailstock would explain a poor fit?
It did go in , but just didn't feel as precision a fit as it did in the
tailstock. would 1 size up feel like this or would there be very obvoius
"slop"?

Regards
Rob

http://www.lathes.co.uk/drummond/page13.html

the one in the middle...
Have sent an email as he does ask for any detailed photo's
Not heard back yet

Hi Rob

Another good place to find information about your Myford is Tony
Griffiths site http://www.lathes.co.uk/index.html

I don't have a Myford, but on the lathes I've worked on, the half-nuts
(plural intended) are two halves of one nut and they clamp together
round the leadscrew when screwcutting.

My suggestion is to get hold of an illustrated parts list so you know
what things should look like.

As they are still in business and there are so many Myfords in use,
getting spares shouldn't be a problem.

Good luck.

John

--
jlh45
------------------------------------------------------------------------
jlh45's Profile: http://www.rcgroups.com/forums/member.php?u=119557
View this thread: http://www.rcgroups.com/forums/showthread.php?t=718454

On Wed, 25 Jul 2007 21:17:25 +0000, Rob wrote:

> http://www.lathes.co.uk/drummond/page13.html
>
> the one in the middle...
> Have sent an email as he does ask for any detailed photo's
> Not heard back yet

Rob;

Welcome to the group, I went from here to Locost, you have done the
reverse. You will find a wealth on information on here, with regards to
Lathes Millers and other tools. Confirm what size the leadscrew is if you
have chance.

Cheers

Adrian

Appologies if this posts twice - I just posted but it disappeared...

On 25 Jul, 20:01, Rob <r...@home.co.k> wrote:
> The bit above the half nut, is this also supposed to be threaded or just
> a pad to support the pressure of the half nut when engaged?
> This "pad" bit is bolted through an vertically elongated hole in the
> carriage, I'm guessing to make it adjustable? does anyone have any info
> regarding how to set this up correctly?
> could it be that mine is just mal adjusted as the half nut does have
> threads , just thinner than the screw's and not square (gone pointy)

I have just checked my recently aquired Myford M-Type and although I
have not dismantled it, the top half of the half nut does appear to be
a pad as you describe. It definitely does not move away from the lead
screw when the carriage is disengaged threrefore it cannot be threaded
I think.

> Also the tail stock is a morse taper, but which one? (M1 and M2 seem to
> be common sizes quoted for Myford parts on the bay of e)
> If I take the chuck off and try and fit the morse attachments I have
> into it they "seem" to fit but not as nicely as they do in the tail
> stock,though I didn't try and clean it out before trying so could be
> traces of swarf and hammerite that seems to have been liberally spilled
> everywhere, good job they didn't attempt to de grease before doing this
> as it seems to be coming off easy enough
> (are they supposed to have an internal morse taper here? again which
> sort should it be?)

I have no idea what morse it is but I can confirm that my machine
appears to be the same as yours. Tools that fit snugly into the
tailstock taper do not fit nicely into the mandrel taper.

Having just checked the half nut, I think I ought to possibly
dismantly and clean the carriage and then reoil. Do any of you guys
know what I should lubricate the bed and also the headstock bearings
with? - presumably way oil for the bed and saddle but what about the
headstock bearings? - I am planning a trip to MaccModels tomorrow so
any advice is appreciated.

Regards
Martin

On Wed, 25 Jul 2007 19:01:01 GMT, Rob <rob@home.co.k> wrote:

>Hello, my first post regarding my first lathe..
>Managed eventually after many failed attempts at buying a lathe to get a
>Myford M Type
>Picked it up Sunday, chap even knocked the price down when I got there :-)
>
>It came with a selection of gears, tools, chucks etc
>
>Managed to get it installed and gave it all a good clean and it is
>bearing signs of many years neglect and abuse
>
>The lead screw half nut mech is very vague and stripping the half nut of
>the lower has revealed that it is very worn and IIRC looked like it has
>tried to cross thread at some point
Rob

If nobody's already pointed it out, the current (August) edition of
Engineering in Miniature magazine has a long article by somebody ( John
Shrubsole) with an problem identical to yours.

The lathe, a 1948 Myford 'M' type had a worn leadscrew and the
owner describes in detail how he turned the existing leadscrew end for end
in order to bring the unworn section at the tailstock end into use with the
saddle and clasp nuts.

There is a planned sequel to describe how he dealt with the worn
clasp nut.

Who's a lucky boy then!

--

Chris Edwards (in deepest Dorset) "....there *must* be an easier way!"

Hi Chris,
well that is good news :-)
Cheers for the heads up for the mag
Bit more bed time reading

Managed to swap a beer token for 20cm or so of fat round bar 40mm
diameter and had a go at facing it, centre drilling it then turning it
down a little

I was getting quite a lot of judderey cuts with some strange markings
(wavy not parallel and more like "digs")
had a wobble of the bar as I could sense that something wasn't quite
right

Noticed quite a lot of play in the bearings with it gripped, so
tightened them up till there was no "knocking" that I could sense and
took some more cuts and all went a lot better, nice smooth curly swarf
and no more judder

I managed to turn the bar down to 32mm cut it off at 45mm (took ages
to get through using the parting jobbie and I cheated the last 1/2 cm
with a hacksaw)
Faced it off, put a nice chamfer on the end and drilled a hole through
it
Looks like I'm on my way to building the System A toolpost in this
months Model Engineers Workshop :-)

Ball turning attachment next ...

Regards
Rob

On Thu, 26 Jul 2007 10:29:11 -0700, robocog <rbarnfather@gmail.com> wrote:

>Hi Chris,
>well that is good news :-)
>Cheers for the heads up for the mag
>Bit more bed time reading
>
>Managed to swap a beer token for 20cm or so of fat round bar 40mm
>diameter and had a go at facing it, centre drilling it then turning it
>down a little
>
>I was getting quite a lot of judderey cuts with some strange markings
>(wavy not parallel and more like "digs")
>had a wobble of the bar as I could sense that something wasn't quite
>right
>
>Noticed quite a lot of play in the bearings with it gripped, so
>tightened them up till there was no "knocking" that I could sense and
>took some more cuts and all went a lot better, nice smooth curly swarf
>and no more judder
>
>I managed to turn the bar down to 32mm cut it off at 45mm (took ages
>to get through using the parting jobbie and I cheated the last 1/2 cm
>with a hacksaw)
>Faced it off, put a nice chamfer on the end and drilled a hole through
>it
>Looks like I'm on my way to building the System A toolpost in this
>months Model Engineers Workshop :-)
>
>Ball turning attachment next ...
>

Rob

Remember what your mom told ya - 'walk, don't run' Welcome to the
Brotherhood!
--

Chris Edwards (in deepest Dorset) "....there *must* be an easier way!"

	#1
Rob	Hello, long newbie questions Hello, my first post regarding my first lathe.. Managed eventually after many failed attempts at buying a lathe to get a Myford M Type Picked it up Sunday, chap even knocked the price down when I got there :-) It came with a selection of gears, tools, chucks etc Managed to get it installed and gave it all a good clean and it is bearing signs of many years neglect and abuse The lead screw half nut mech is very vague and stripping the half nut of the lower has revealed that it is very worn and IIRC looked like it has tried to cross thread at some point I have joined the Drummond yahoo group and had a look in the files section where there is a set of diagrams for creating a bolt on half nut to the casting making subsequent replacement trivial I am certainly in no hurry to get screw threading as I am a novice and realize that there is plenty to get my head round before I will require this feature (not used a lathe since school - which was many many years ago) I have pondered as to whether it would be possible and easiest to remove the casting, clean up where the threads were and silver solder some material (maybe using tube) and have it re threaded and then mill the top half of the tube away leaving a fresh new half nut? Can anyone see any problems attempting this? The bit above the half nut, is this also supposed to be threaded or just a pad to support the pressure of the half nut when engaged? This "pad" bit is bolted through an vertically elongated hole in the carriage, I'm guessing to make it adjustable? does anyone have any info regarding how to set this up correctly? could it be that mine is just mal adjusted as the half nut does have threads , just thinner than the screw's and not square (gone pointy) Also the tail stock is a morse taper, but which one? (M1 and M2 seem to be common sizes quoted for Myford parts on the bay of e) If I take the chuck off and try and fit the morse attachments I have into it they "seem" to fit but not as nicely as they do in the tail stock,though I didn't try and clean it out before trying so could be traces of swarf and hammerite that seems to have been liberally spilled everywhere, good job they didn't attempt to de grease before doing this as it seems to be coming off easy enough (are they supposed to have an internal morse taper here? again which sort should it be?) Thanks in advance Apologies for the long first post and if I have used the wrong terminology, I am a newbie and enjoying the learning curve so far...and perhaps still a little too enthusiastic in finding out about this machine Regards Rob

	#2
dave sanderson	Re: Hello, long newbie questions On 25 Jul, 20:01, Rob <r...@home.co.k> wrote: > Hello, my first post regarding my first lathe.. > Managed eventually after many failed attempts at buying a lathe to get a > Myford M Type > Picked it up Sunday, chap even knocked the price down when I got there :-) > > It came with a selection of gears, tools, chucks etc > > Managed to get it installed and gave it all a good clean and it is > bearing signs of many years neglect and abuse > > The lead screw half nut mech is very vague and stripping the half nut of > the lower has revealed that it is very worn and IIRC looked like it has > tried to cross thread at some point > I have joined the Drummond yahoo group and had a look in the files > section where there is a set of diagrams for creating a bolt on half nut > to the casting making subsequent replacement trivial > > I am certainly in no hurry to get screw threading as I am a novice and > realize that there is plenty to get my head round before I will require > this feature (not used a lathe since school - which was many many years ago) > > I have pondered as to whether it would be possible and easiest to remove > the casting, clean up where the threads were and silver solder some > material (maybe using tube) and have it re threaded and then mill the > top half of the tube away leaving a fresh new half nut? > > Can anyone see any problems attempting this? > > The bit above the half nut, is this also supposed to be threaded or just > a pad to support the pressure of the half nut when engaged? > This "pad" bit is bolted through an vertically elongated hole in the > carriage, I'm guessing to make it adjustable? does anyone have any info > regarding how to set this up correctly? > could it be that mine is just mal adjusted as the half nut does have > threads , just thinner than the screw's and not square (gone pointy) > > Also the tail stock is a morse taper, but which one? (M1 and M2 seem to > be common sizes quoted for Myford parts on the bay of e) > If I take the chuck off and try and fit the morse attachments I have > into it they "seem" to fit but not as nicely as they do in the tail > stock,though I didn't try and clean it out before trying so could be > traces of swarf and hammerite that seems to have been liberally spilled > everywhere, good job they didn't attempt to de grease before doing this > as it seems to be coming off easy enough > (are they supposed to have an internal morse taper here? again which > sort should it be?) > > Thanks in advance > Apologies for the long first post and if I have used the wrong > terminology, I am a newbie and enjoying the learning curve so far...and > perhaps still a little too enthusiastic in finding out about this machine > > Regards > Rob I assume someone has pointed you to tonys site: www.lathes.co.uk where you'll probably find some answers to your machine specific questions. I would think that both the tailstock and the head stock will have a morse taper, tho not ness the same one, often the headstock is 1 larger. Dave

	#3
Rob	Re: Hello, long newbie questions Cheers Dave, Yep lathes.co.uk bookmarked and partly my guide in choosing the Myford in the first place, a mine of info on there I only came across it as I had just missed a Smart and Brown (M) just down the road that went for £100 the day before I found out about it being for sale!! The poor thing had been sat out in the rain for a week, had boxes of collets and what seemed to be a very comprehensive set of chucks/tools and "stuff" in the cupboards so did a google search to see what I had just missed... mine seems to be on pg13 of the Drummond section, the one in the middle of the page sat on its cast stand I did email Myford regarding trying to get a direct replacement for the half nut, and it looks like I'm out of luck by a few tens of years :-) I did spot a NEW leadscrew and half nut on lathes.co.uk , but the price is roughly double what I paid for the machine in the first place ;-) and is kind of out of my league Happy to have a clunker to learn on for now Perhaps the morse being slightly bigger in the head compared to the tailstock would explain a poor fit? It did go in , but just didn't feel as precision a fit as it did in the tailstock. would 1 size up feel like this or would there be very obvoius "slop"? Regards Rob

	#4
Rob	Re: Hello, long newbie questions http://www.lathes.co.uk/drummond/page13.html the one in the middle... Have sent an email as he does ask for any detailed photo's Not heard back yet

	#5
jlh45	Re: Hello, long newbie questions Hi Rob Another good place to find information about your Myford is Tony Griffiths site http://www.lathes.co.uk/index.html I don't have a Myford, but on the lathes I've worked on, the half-nuts (plural intended) are two halves of one nut and they clamp together round the leadscrew when screwcutting. My suggestion is to get hold of an illustrated parts list so you know what things should look like. As they are still in business and there are so many Myfords in use, getting spares shouldn't be a problem. Good luck. John -- jlh45 ------------------------------------------------------------------------ jlh45's Profile: http://www.rcgroups.com/forums/member.php?u=119557 View this thread: http://www.rcgroups.com/forums/showthread.php?t=718454

	#6
Adrian	Re: Hello, long newbie questions On Wed, 25 Jul 2007 21:17:25 +0000, Rob wrote: > http://www.lathes.co.uk/drummond/page13.html > > the one in the middle... > Have sent an email as he does ask for any detailed photo's > Not heard back yet Rob; Welcome to the group, I went from here to Locost, you have done the reverse. You will find a wealth on information on here, with regards to Lathes Millers and other tools. Confirm what size the leadscrew is if you have chance. Cheers Adrian

	#7
eskimobob	Re: Hello, long newbie questions Appologies if this posts twice - I just posted but it disappeared... On 25 Jul, 20:01, Rob <r...@home.co.k> wrote: > The bit above the half nut, is this also supposed to be threaded or just > a pad to support the pressure of the half nut when engaged? > This "pad" bit is bolted through an vertically elongated hole in the > carriage, I'm guessing to make it adjustable? does anyone have any info > regarding how to set this up correctly? > could it be that mine is just mal adjusted as the half nut does have > threads , just thinner than the screw's and not square (gone pointy) I have just checked my recently aquired Myford M-Type and although I have not dismantled it, the top half of the half nut does appear to be a pad as you describe. It definitely does not move away from the lead screw when the carriage is disengaged threrefore it cannot be threaded I think. > Also the tail stock is a morse taper, but which one? (M1 and M2 seem to > be common sizes quoted for Myford parts on the bay of e) > If I take the chuck off and try and fit the morse attachments I have > into it they "seem" to fit but not as nicely as they do in the tail > stock,though I didn't try and clean it out before trying so could be > traces of swarf and hammerite that seems to have been liberally spilled > everywhere, good job they didn't attempt to de grease before doing this > as it seems to be coming off easy enough > (are they supposed to have an internal morse taper here? again which > sort should it be?) I have no idea what morse it is but I can confirm that my machine appears to be the same as yours. Tools that fit snugly into the tailstock taper do not fit nicely into the mandrel taper. Having just checked the half nut, I think I ought to possibly dismantly and clean the carriage and then reoil. Do any of you guys know what I should lubricate the bed and also the headstock bearings with? - presumably way oil for the bed and saddle but what about the headstock bearings? - I am planning a trip to MaccModels tomorrow so any advice is appreciated. Regards Martin

	#8
Chris Edwards	Re: Hello, long newbie questions On Wed, 25 Jul 2007 19:01:01 GMT, Rob <rob@home.co.k> wrote: >Hello, my first post regarding my first lathe.. >Managed eventually after many failed attempts at buying a lathe to get a >Myford M Type >Picked it up Sunday, chap even knocked the price down when I got there :-) > >It came with a selection of gears, tools, chucks etc > >Managed to get it installed and gave it all a good clean and it is >bearing signs of many years neglect and abuse > >The lead screw half nut mech is very vague and stripping the half nut of >the lower has revealed that it is very worn and IIRC looked like it has >tried to cross thread at some point Rob If nobody's already pointed it out, the current (August) edition of Engineering in Miniature magazine has a long article by somebody ( John Shrubsole) with an problem identical to yours. The lathe, a 1948 Myford 'M' type had a worn leadscrew and the owner describes in detail how he turned the existing leadscrew end for end in order to bring the unworn section at the tailstock end into use with the saddle and clasp nuts. There is a planned sequel to describe how he dealt with the worn clasp nut. Who's a lucky boy then! -- Chris Edwards (in deepest Dorset) "....there must be an easier way!"

	#9
robocog	Re: Hello, long newbie questions Hi Chris, well that is good news :-) Cheers for the heads up for the mag Bit more bed time reading Managed to swap a beer token for 20cm or so of fat round bar 40mm diameter and had a go at facing it, centre drilling it then turning it down a little I was getting quite a lot of judderey cuts with some strange markings (wavy not parallel and more like "digs") had a wobble of the bar as I could sense that something wasn't quite right Noticed quite a lot of play in the bearings with it gripped, so tightened them up till there was no "knocking" that I could sense and took some more cuts and all went a lot better, nice smooth curly swarf and no more judder I managed to turn the bar down to 32mm cut it off at 45mm (took ages to get through using the parting jobbie and I cheated the last 1/2 cm with a hacksaw) Faced it off, put a nice chamfer on the end and drilled a hole through it Looks like I'm on my way to building the System A toolpost in this months Model Engineers Workshop :-) Ball turning attachment next ... Regards Rob