On Sep 27, 2024, at 5:24 PM, Al MacDonald <eagle.gpul@...> wrote:

Great Jack, you are back on the go again. ?I keep a notebook with sections for each machine in my shop. ?Each one includes info I need to know but might have forgotten…… lubrication type, setups, what not to do again, etc. etc. It’s saved my bacon more than once.

Do you have the Southbend book called “How to Run a Lathe”? ?if not, you should try to latch onto a copy. ?It’s a goldmine of everything one might need to know when running a lathe in general, and SB in particular, including setups, sharpening the cutting tools, tool heights (especially lantern style toolholders), taper turning, threading, multi-start threads, grinding, etc. etc. I still refer to mine from time to time.

Cheers,

al.

On Sep 27, 2024, at 14:45, Jack Dinan via <jack@...> wrote:

Al:?

Thank you for the suggestion.

It turns out that the problem was where it usually lies ?- with me.

Instead of feeding with the half nut lever, I was feeding with the clutch knob.

Several years since I cut a thread, and I just plumb forgot.

On Sep 27, 2024, at 3:31 PM, Al MacDonald <eagle.gpul@...> wrote:

Just a thought here….. are you withdrawing the thread cutting tool while running the leadscrew/carriage to its start position? ?If not, the slop on the geartrain/leadscrew/half nut might be putting excessive pressure on the cutting tool. ?There, out of ideas.

Cheers, ?al.

On Sep 23, 2024, at 11:25, Jack Dinan via <jack@...> wrote:

SB 9A

Cutting a thread using the method of engaging the lead screw, running forward, stop, running in reverse without disengaging, repeat.

Running forward goes smoothly.

Running in reverse flips the belt from the pulley.

?

The spindle turns freely cw and ccw.

The lead screw grabs when I turn it in reverse by hand.

?

I removed the gear box from the lathe and all looks clean.

Any thoughts on what causes the problem in reverse?

?

How does the bearing surface on the left end of the lead screw get its lubrication?

Thanks.

?

On Sep 27, 2024, at 14:45, Jack Dinan via <jack@...> wrote:

Al:?

Thank you for the suggestion.

It turns out that the problem was where it usually lies ?- with me.

Instead of feeding with the half nut lever, I was feeding with the clutch knob.

Several years since I cut a thread, and I just plumb forgot.

On Sep 27, 2024, at 3:31 PM, Al MacDonald <eagle.gpul@...> wrote:

Just a thought here….. are you withdrawing the thread cutting tool while running the leadscrew/carriage to its start position? ?If not, the slop on the geartrain/leadscrew/half nut might be putting excessive pressure on the cutting tool. ?There, out of ideas.

Cheers, ?al.

On Sep 23, 2024, at 11:25, Jack Dinan via <jack@...> wrote:

SB 9A

Cutting a thread using the method of engaging the lead screw, running forward, stop, running in reverse without disengaging, repeat.

Running forward goes smoothly.

Running in reverse flips the belt from the pulley.

?

The spindle turns freely cw and ccw.

The lead screw grabs when I turn it in reverse by hand.

?

I removed the gear box from the lathe and all looks clean.

Any thoughts on what causes the problem in reverse?

?

How does the bearing surface on the left end of the lead screw get its lubrication?

Thanks.

?

On Sep 27, 2024, at 3:31 PM, Al MacDonald <eagle.gpul@...> wrote:

Just a thought here….. are you withdrawing the thread cutting tool while running the leadscrew/carriage to its start position? ?If not, the slop on the geartrain/leadscrew/half nut might be putting excessive pressure on the cutting tool. ?There, out of ideas.

Cheers, ?al.

On Sep 23, 2024, at 11:25, Jack Dinan via <jack@...> wrote:

SB 9A

Cutting a thread using the method of engaging the lead screw, running forward, stop, running in reverse without disengaging, repeat.

Running forward goes smoothly.

Running in reverse flips the belt from the pulley.

?

The spindle turns freely cw and ccw.

The lead screw grabs when I turn it in reverse by hand.

?

I removed the gear box from the lathe and all looks clean.

Any thoughts on what causes the problem in reverse?

?

How does the bearing surface on the left end of the lead screw get its lubrication?

Thanks.

?

On Sep 23, 2024, at 11:25, Jack Dinan via <jack@...> wrote:

SB 9A

Cutting a thread using the method of engaging the lead screw, running forward, stop, running in reverse without disengaging, repeat.

Running forward goes smoothly.

Running in reverse flips the belt from the pulley.

?

The spindle turns freely cw and ccw.

The lead screw grabs when I turn it in reverse by hand.

?

I removed the gear box from the lathe and all looks clean.

Any thoughts on what causes the problem in reverse?

?

How does the bearing surface on the left end of the lead screw get its lubrication?

Thanks.

?

On Sep 23, 2024, at 11:25, Jack Dinan via groups.io <jack@...> wrote:

?

SB 9A

Cutting a thread using the method of engaging the lead screw, running forward, stop, running in reverse without disengaging, repeat.

Running forward goes smoothly.

Running in reverse flips the belt from the pulley.

?

The spindle turns freely cw and ccw.

The lead screw grabs when I turn it in reverse by hand.

?

I removed the gear box from the lathe and all looks clean.

Any thoughts on what causes the problem in reverse?

?

How does the bearing surface on the left end of the lead screw get its lubrication?

Thanks.

?

Hi There,

?

Yes, I know about the extension for the Taper Attachment

(I even knew the guy that designed it and got MLA to

make it).? I just don't know if it will function with the Heavy

Ten taper (it was designed for the 9 inch/10K lathes in mind).

I did buy it and have it sitting in the same drawer with the

MLA cross slide attachment.? What I haven't investigated is

how much loss of travel will I experience using the MLA

cross slide compared with the original cross slide.

?

You see, the 10R/10L cross slide is very short compared to

the 9 inch/10K cross slide and it may not be possible to use

it in conjunction with the taper attachment.

?

At present, my Heavy Ten doesn't have a taper on it but I

have accumulated most of the parts to put one on.? I am

concerned the bracket with the tube and bearings that

support the telescoping cross feed screw will be in the way

or at least will limit the MLA cross slide's travel.?

?

The one advantage of the MLA cross slide is there is going

to be a great deal more contact area in the dovetail ways?

between the saddle and the cross slide.? This also compli-

cates the making of a tapered gib so I decided to use a

plain straight gib like the 9 inch/10K uses.

?

Of course, this is all theory.? If it looks like the MLA cross

slide won't work, I can always put it on my 9 inch cabinet

model I have (as long as I haven't machined it yet).

?

Good Luck!

-Blue Chips-

Webb

?

Hi There,

?

I purchased one of those kits earlier this year

and it is currently sitting in a drawer.? I plan to?

adapt it to my Heavy Ten.? There is plenty of

metal and I am pretty sure it will work.? I will

have to make changes to the machining plans

and I am not quite sure if it will "play nice"

with the taper attachment but I'll tackle the

problem when necessary.

?

Good Luck!

-Blue Chips-

Webb

?

------ Original Message ------
From: arknack@...
To: SouthBendLathe@groups.io
Sent: Friday, September 20th 2024, 13:19
Subject: Re: [SouthBendLathe] MLA Crossslide
?

Here is a very technical article on tool life between aged and non-aged CI. Bottom line is aged cast Iron extend the machine tool life.

?

Al

?

?

?

From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf Of eddie.draper@... via groups.io
Sent: Friday, September 20, 2024 8:04 AM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] MLA Crossslide

?

I imagine that stress relieved where necesary actually means where appropriate.? Castings for the slides, yes, castings for a handle, no.

?

As an aside, I have never understood how aging at ambient temperature releases any part of locked in stresses created as a result of differential temperatures during the cooling of a casting.? I would have thought it would be necessary to apply external loads so that areas with a high residual tensile stress were forced to yield somewhat.? After all, that is what results in the deflections seen in service on castings or fabrications that have not been properly stress relieved at birth.

?

?

?

?

?

-------- Original message --------

From: "ww_big_al via groups.io" <arknack@...>

Date: 20/09/2024 12:14 (GMT+00:00)

To: SouthBendLathe@groups.io

Subject: Re: [SouthBendLathe] MLA Crossslide

?

I purchased one of their kit several years ago. That project is still on my never ending to-do list.? The casting is well done. Stress relieved means it has been heated after casting to relieve the internal pressures so it wont warp after machining. In the old days, they would let the parts age a year or more to relieve the stresses.

Paula on Practical Machinist did a excellent article on machining these. Here is the link.
file:///C:/Users/arkna/OneDrive/Documents/Manuals/Machine%20Tools/Southbend%20Lathe/T-Slot%20cross%20slide/Machining%20A%20T-Slotted%20Cross%20Slide.htm

Al-

> -----Original Message-----
> From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf
> Of mike allen
> Sent: Friday, September 20, 2024 1:18 AM
> To: SouthBendLathe@groups.io
> Subject: [SouthBendLathe] MLA Crossslide
>?
> Has anyone here don the MLA Crossslide for a South Bend 9A lathe ? I'm
> thiking of just buying the plans & wondering do the drawings include the
> dimensions for the Gibb too ? They also mention that if ya buy the casting
> they are " stress relieved where necessary " just what does that mean ? I
> have a bud that's gonna give me the cast iron .
>?
> thanks
>?
> animal
>?
>?
>?
>?
>?






?

?

-----Original Message-----
From: SouthBendLathe@groups.io [mailto:SouthBendLathe@groups.io] On
Behalf Of ww_big_al via groups.io
Sent: September 20, 2024 9:39 AM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] MLA Crossslide

Try this one. Looks like my computer kept going to a saved version.


cross-slide.177054/page-5#post-1449260

Al

-----Original Message-----
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf

Of

ww_big_al via groups.io
Sent: Friday, September 20, 2024 12:32 PM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] MLA Crossslide

file:///C:/Users/arkna/OneDrive/Documents/Manuals/Machine%20Tools/So
u

thbend%
20Lathe/T-Slot%20cross%20slide/Machining%20A%20T-
Slotted%20Cross%20Slide.htm

file:///C:/Users/arkna/OneDrive/Documents/Manuals/Machine%20Tools/So
u

thbend%
20Lathe/T-Slot%20cross%20slide/Machining%20A%20T-
Slotted%20Cross%20Slide.htm


Lets try it again. The email program must have trimmed it

Al

-----Original Message-----
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On

Behalf Of

John Dammeyer
Sent: Friday, September 20, 2024 12:28 PM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] MLA Crossslide

That link doesn't work.

-----Original Message-----
From: SouthBendLathe@groups.io [mailto:SouthBendLathe@groups.io]

On

Behalf Of ww_big_al via groups.io
Sent: September 20, 2024 4:14 AM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] MLA Crossslide

I purchased one of their kit several years ago. That project is
still on my never ending to-do list. The casting is well done.
Stress relieved means it has been heated after casting to relieve
the internal pressures so it won't warp after machining. In the
old days, they would let the parts age a year or more to relieve
the

stresses.

Paula on Practical Machinist did a excellent article on machining
these. Here is the link.

file:///C:/Users/arkna/OneDrive/Documents/Manuals/Machine%20Tools/So

uthbend%20Lathe/T-Slot%20cross%20slide/Machining%20A%20T-
Slotted%20Cross%20Slide.htm

Al-

-----Original Message-----
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On

Behalf

Of mike allen
Sent: Friday, September 20, 2024 1:18 AM
To: SouthBendLathe@groups.io
Subject: [SouthBendLathe] MLA Crossslide

Has anyone here don the MLA Crossslide for a South Bend 9A lathe ?
I'm thiking of just buying the plans & wondering do the drawings
include the dimensions for the Gibb too ? They also mention that
if ya buy the casting they are " stress relieved where necessary "
just what does that mean ? I have a bud that's gonna give me the
cast iron

.

thanks

animal

On Sep 20, 2024, at 05:13, ww_big_al via groups.io <arknack@...> wrote:

I purchased one of their kit several years ago. That project is still on my never ending to-do list. The casting is well done. Stress relieved means it has been heated after casting to relieve the internal pressures so it wont warp after machining. In the old days, they would let the parts age a year or more to relieve the stresses.

Paula on Practical Machinist did a excellent article on machining these. Here is the link.
file:///C:/Users/arkna/OneDrive/Documents/Manuals/Machine%20Tools/Southbend%20Lathe/T-Slot%20cross%20slide/Machining%20A%20T-Slotted%20Cross%20Slide.htm

Al-

-----Original Message-----
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf
Of mike allen
Sent: Friday, September 20, 2024 1:18 AM
To: SouthBendLathe@groups.io
Subject: [SouthBendLathe] MLA Crossslide

Has anyone here don the MLA Crossslide for a South Bend 9A lathe ? I'm
thiking of just buying the plans & wondering do the drawings include the
dimensions for the Gibb too ? They also mention that if ya buy the casting
they are " stress relieved where necessary " just what does that mean ? I
have a bud that's gonna give me the cast iron .

thanks

animal

-----Original Message-----
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf
Of ww_big_al via groups.io
Sent: Friday, September 20, 2024 12:32 PM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] MLA Crossslide

file:///C:/Users/arkna/OneDrive/Documents/Manuals/Machine%20Tools/Sou
thbend%
20Lathe/T-Slot%20cross%20slide/Machining%20A%20T-
Slotted%20Cross%20Slide.htm


file:///C:/Users/arkna/OneDrive/Documents/Manuals/Machine%20Tools/Sou
thbend%
20Lathe/T-Slot%20cross%20slide/Machining%20A%20T-
Slotted%20Cross%20Slide.htm


Lets try it again. The email program must have trimmed it

Al

-----Original Message-----
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On

Behalf Of

John Dammeyer
Sent: Friday, September 20, 2024 12:28 PM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] MLA Crossslide

That link doesn't work.

-----Original Message-----
From: SouthBendLathe@groups.io [mailto:SouthBendLathe@groups.io]

On

Behalf Of ww_big_al via groups.io
Sent: September 20, 2024 4:14 AM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] MLA Crossslide

I purchased one of their kit several years ago. That project is
still on my never ending to-do list. The casting is well done.
Stress relieved means it has been heated after casting to relieve
the internal pressures so it won't warp after machining. In the old
days, they would let the parts age a year or more to relieve the

Paula on Practical Machinist did a excellent article on machining
these. Here is the link.

file:///C:/Users/arkna/OneDrive/Documents/Manuals/Machine%20Tools/So

uthbend%20Lathe/T-Slot%20cross%20slide/Machining%20A%20T-
Slotted%20Cross%20Slide.htm

Al-

-----Original Message-----
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On

Behalf

Of mike allen
Sent: Friday, September 20, 2024 1:18 AM
To: SouthBendLathe@groups.io
Subject: [SouthBendLathe] MLA Crossslide

Has anyone here don the MLA Crossslide for a South Bend 9A lathe ?
I'm thiking of just buying the plans & wondering do the drawings
include the dimensions for the Gibb too ? They also mention that
if ya buy the casting they are " stress relieved where necessary "
just what does that mean ? I have a bud that's gonna give me the
cast iron

.

thanks

animal

-----Original Message-----
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf
Of John Dammeyer
Sent: Friday, September 20, 2024 12:28 PM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] MLA Crossslide

That link doesn't work.

-----Original Message-----
From: SouthBendLathe@groups.io [mailto:SouthBendLathe@groups.io] On
Behalf Of ww_big_al via groups.io
Sent: September 20, 2024 4:14 AM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] MLA Crossslide

I purchased one of their kit several years ago. That project is still
on my never ending to-do list. The casting is well done. Stress
relieved means it has been heated after casting to relieve the
internal pressures so it won't warp after machining. In the old days,
they would let the parts age a year or more to relieve the stresses.

Paula on Practical Machinist did a excellent article on machining
these. Here is the link.

file:///C:/Users/arkna/OneDrive/Documents/Manuals/Machine%20Tools/So

uthbend%20Lathe/T-Slot%20cross%20slide/Machining%20A%20T-
Slotted%20Cross%20Slide.htm

Al-

-----Original Message-----
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On

Behalf

Of mike allen
Sent: Friday, September 20, 2024 1:18 AM
To: SouthBendLathe@groups.io
Subject: [SouthBendLathe] MLA Crossslide

Has anyone here don the MLA Crossslide for a South Bend 9A lathe ?
I'm thiking of just buying the plans & wondering do the drawings
include the dimensions for the Gibb too ? They also mention that if
ya buy the casting they are " stress relieved where necessary " just
what does that mean ? I have a bud that's gonna give me the cast iron

thanks

animal

-----Original Message-----
From: SouthBendLathe@groups.io [mailto:SouthBendLathe@groups.io] On
Behalf Of ww_big_al via groups.io
Sent: September 20, 2024 4:14 AM
To: SouthBendLathe@groups.io
Subject: Re: [SouthBendLathe] MLA Crossslide

I purchased one of their kit several years ago. That project is still on my never
ending to-do list. The casting is well done. Stress relieved means it has been
heated after casting to relieve the internal pressures so it wont warp after
machining. In the old days, they would let the parts age a year or more to
relieve the stresses.

Paula on Practical Machinist did a excellent article on machining these. Here
is the link.
file:///C:/Users/arkna/OneDrive/Documents/Manuals/Machine%20Tools/So
uthbend%20Lathe/T-Slot%20cross%20slide/Machining%20A%20T-
Slotted%20Cross%20Slide.htm

Al-

-----Original Message-----
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf
Of mike allen
Sent: Friday, September 20, 2024 1:18 AM
To: SouthBendLathe@groups.io
Subject: [SouthBendLathe] MLA Crossslide

Has anyone here don the MLA Crossslide for a South Bend 9A lathe ? I'm
thiking of just buying the plans & wondering do the drawings include the
dimensions for the Gibb too ? They also mention that if ya buy the casting
they are " stress relieved where necessary " just what does that mean ? I
have a bud that's gonna give me the cast iron .

thanks

animal

On Sep 20, 2024, at 06:06, Andrei via groups.io <calciu1@...> wrote:

?

Stress relieving took part over more than a year and it was done outdoors. It allowed the parts to freeze in winter. There is a lot of cryogenic treatment of parts done today with liquid nitrogen. They just did not have that in the "good ol'e days" so they had the parts under the un in summer and in freezing temps in winter. Worked great.

Get

---

From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> on behalf of eddie.draper@... via groups.io <eddie.draper@...>
Sent: Friday, September 20, 2024 8:03:38 AM
To: SouthBendLathe@groups.io <SouthBendLathe@groups.io>
Subject: Re: [SouthBendLathe] MLA Crossslide

?

I imagine that stress relieved where necesary actually means where appropriate.? Castings for the slides, yes, castings for a handle, no.

As an aside, I have never understood how aging at ambient temperature releases any part of locked in stresses created as a result of differential temperatures during the cooling of a casting.? I would have thought it would be necessary to apply external loads so that areas with a high residual tensile stress were forced to yield somewhat.? After all, that is what results in the deflections seen in service on castings or fabrications that have not been properly stress relieved at birth.

-------- Original message --------

From: "ww_big_al via groups.io" <arknack@...>

Date: 20/09/2024 12:14 (GMT+00:00)

To: SouthBendLathe@groups.io

Subject: Re: [SouthBendLathe] MLA Crossslide

I purchased one of their kit several years ago. That project is still on my never ending to-do list.? The casting is well done. Stress relieved means it has been heated after casting to relieve the internal pressures so it wont warp after machining. In the old days, they would let the parts age a year or more to relieve the stresses.

Paula on Practical Machinist did a excellent article on machining these. Here is the link.
file:///C:/Users/arkna/OneDrive/Documents/Manuals/Machine%20Tools/Southbend%20Lathe/T-Slot%20cross%20slide/Machining%20A%20T-Slotted%20Cross%20Slide.htm

Al-

> -----Original Message-----
> From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf
> Of mike allen
> Sent: Friday, September 20, 2024 1:18 AM
> To: SouthBendLathe@groups.io
> Subject: [SouthBendLathe] MLA Crossslide
>
> Has anyone here don the MLA Crossslide for a South Bend 9A lathe ? I'm
> thiking of just buying the plans & wondering do the drawings include the
> dimensions for the Gibb too ? They also mention that if ya buy the casting
> they are " stress relieved where necessary " just what does that mean ? I
> have a bud that's gonna give me the cast iron .
>
> thanks
>
> animal
>
>
>
>
>