"Rick" <vwrick@...> writes: The one thing you can not use is the thread dial. Not true :-) You can drop the half nut at the end of the thread, then kill power, reverse, and when your "number" lines up again, engage the half nuts and you're back where you started.
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??? ??? So any thoughts on a combo ER40 chuck/block ?? You could
go from the lathe to the mill or vice versa without taking the
part out of the chuck/block , there may be other +'s that haven't
hit me yet .
??? ??? animal
On 2/14/2023 7:50 PM, Andrei wrote:
toggle quoted message
Show quoted text
You only back out the cutter after the spindle stops? Not when you
get to the end of the thread? Is there much variation where the
cutter ends up?
Get
On Tue, Feb 14, 2023 at 05:18 PM, mike allen wrote:
??? ??? So , I've been
thinking of making a ER40 collet chuck as you folks know
form the tread I started last week . I keep thinking the
only part that I'm not 100 %
sure I can pull off is the
metric threads on the collet nut . So Erik's post got me
thinking , why does the chuck need to be threaded for
metric threads ? Why cant we make our own nuts &
thread them SAE fine ? Does the nut need to be hardened ??
??? ??? Another thought I
have been thinking about is how bout a collet chuck that
doubles as a collet block ?
??? ??? Thought's ?
??? ??? thanks
??? ??? animal
?
There is info on here about cutting metric threads on a SB9. You
need to swap a few gears, to drive the lead screw at a different
rate. The one thing you can not use is the thread dial. Once you
engage the half nuts, you must leave them engaged until you are
finished cutting the thread. You make a pass, and shut the power
off just as you are finishing the last thread. After the spindle
stops, you back out the cutter, run the lathe in reverse to get
back to the beginning and then crank back into the cut. It is a
little slower than using the threading dial, but not bad.
|
Re: New member seeking info on my 3 Jaw Chuck
1-1/2 - 8 is a standard thread for a lot of lathes.?
Get
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Hi everyone, I am looking for a Metal Lathe Dog Drive Face Plate for my 1935 SB Lathe. I don't know what the thread size is, so took my 3 Jaw chuck off and took it to a Machine shop to find out what size the connecting threads were. They threaded a Die,
into the head and told me it measured 1 5/8-8, I can't find that dim anywhere I tried converting 1 5/8 to mm and still can't find the Drive Face Plate I want. The Picture attached is what I am looking for, I snipped it from the net.? Thank you for your help!
?
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You only back out the cutter after the spindle stops? Not when you get to the end of the thread? Is there much variation where the cutter ends up?
Get
toggle quoted message
Show quoted text
On Tue, Feb 14, 2023 at 05:18 PM, mike allen wrote:
??? ??? So , I've been thinking of making a ER40 collet chuck as you folks know form the tread I started last week . I keep thinking the only part that I'm not 100 %
sure I can pull off is the metric threads on the collet nut . So Erik's post got me thinking , why does the chuck need to be threaded for metric threads ? Why cant we make our own nuts & thread them SAE fine ? Does the nut need
to be hardened ??
??? ??? Another thought I have been thinking about is how bout a collet chuck that doubles as a collet block ?
??? ??? Thought's ?
??? ??? thanks
??? ??? animal
?
There is info on here about cutting metric threads on a SB9. You need to swap a few gears, to drive the lead screw at a different rate. The one thing you can not use is the thread dial. Once you engage the half nuts, you must leave them engaged until you are
finished cutting the thread. You make a pass, and shut the power off just as you are finishing the last thread. After the spindle stops, you back out the cutter, run the lathe in reverse to get back to the beginning and then crank back into the cut. It is
a little slower than using the threading dial, but not bad.
|
Re: New member seeking info on my 3 Jaw Chuck
What size lathe? Are you sure it isn’t 1 1/2 x 8? Measure the spindle threads ?with a caliper.
|
New member seeking info on my 3 Jaw Chuck
Hi everyone, I am looking for a Metal Lathe Dog Drive Face Plate for my 1935 SB Lathe. I don't know what the thread size is, so took my 3 Jaw chuck off and took it to a Machine shop to find out what size the connecting threads were. They threaded a Die, into the head and told me it measured 1 5/8-8, I can't find that dim anywhere I tried converting 1 5/8 to mm and still can't find the Drive Face Plate I want. The Picture attached is what I am looking for, I snipped it from the net.? Thank you for your help!
?
|
On Tue, Feb 14, 2023 at 05:18 PM, mike allen wrote:
??? ??? So , I've been thinking of making a ER40 collet chuck as you folks know form the tread I started last week . I keep thinking the only part that I'm not 100 %
sure I can pull off is the metric threads on the collet nut . So Erik's post got me thinking , why does the chuck need to be threaded for metric threads ? Why cant we make our own nuts & thread them SAE fine ? Does the nut need to be hardened ??
??? ??? Another thought I have been thinking about is how bout a collet chuck that doubles as a collet block ?
??? ??? Thought's ?
??? ??? thanks
??? ??? animal
?
There is info on here about cutting metric threads on a SB9. You need to swap a few gears, to drive the lead screw at a different rate. The one thing you can not use is the thread dial. Once you engage the half nuts, you must leave them engaged until you are finished cutting the thread. You make a pass, and shut the power off just as you are finishing the last thread. After the spindle stops, you back out the cutter, run the lathe in reverse to get back to the beginning and then crank back into the cut. It is a little slower than using the threading dial, but not bad.
|
You're one of us, and it takes one to know one! ;)
Besides, normal people are boring!
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
On Tuesday, February 14, 2023 at 06:07:46?PM CST, Nick Andrews <nickjandrews@...> wrote:
On Tue, Feb 14, 2023 at 5:21 PM mike allen < animal@...> wrote:
??? ??? Well , thats better the throwing? your nut? away cause ya
screwed it up .
?up
On 2/14/2023 2:27 PM, Andrei wrote:
I think the nut is the most complex item in the build. Many who
have built these chucks seem to just buy their nuts (oh, that
sounds funny).
??? ??? So , I've been thinking of making a
ER40 collet chuck as you folks know form the tread I started
last week . I keep thinking the only part that I'm not 100 %
sure I can pull off is the metric threads on
the collet nut . So Erik's post got me thinking , why does
the chuck need to be threaded for metric threads ? Why cant
we make our own nuts & thread them SAE fine ? Does the
nut need to be hardened ??
??? ??? Another thought I have been thinking
about is how bout a collet chuck that doubles as a collet
block ?
??? ??? Thought's ?
??? ??? thanks
??? ??? animal
|
toggle quoted message
Show quoted text
On Tue, Feb 14, 2023 at 5:21 PM mike allen < animal@...> wrote:
??? ??? Well , thats better the throwing? your nut? away cause ya
screwed it up .
?up
On 2/14/2023 2:27 PM, Andrei wrote:
I think the nut is the most complex item in the build. Many who
have built these chucks seem to just buy their nuts (oh, that
sounds funny).
??? ??? So , I've been thinking of making a
ER40 collet chuck as you folks know form the tread I started
last week . I keep thinking the only part that I'm not 100 %
sure I can pull off is the metric threads on
the collet nut . So Erik's post got me thinking , why does
the chuck need to be threaded for metric threads ? Why cant
we make our own nuts & thread them SAE fine ? Does the
nut need to be hardened ??
??? ??? Another thought I have been thinking
about is how bout a collet chuck that doubles as a collet
block ?
??? ??? Thought's ?
??? ??? thanks
??? ??? animal
|
??? ??? Well , thats better the throwing? your nut? away cause ya
screwed it up .
?up
On 2/14/2023 2:27 PM, Andrei wrote:
toggle quoted message
Show quoted text
I think the nut is the most complex item in the build. Many who
have built these chucks seem to just buy their nuts (oh, that
sounds funny).
??? ??? So , I've been thinking of making a
ER40 collet chuck as you folks know form the tread I started
last week . I keep thinking the only part that I'm not 100 %
sure I can pull off is the metric threads on
the collet nut . So Erik's post got me thinking , why does
the chuck need to be threaded for metric threads ? Why cant
we make our own nuts & thread them SAE fine ? Does the
nut need to be hardened ??
??? ??? Another thought I have been thinking
about is how bout a collet chuck that doubles as a collet
block ?
??? ??? Thought's ?
??? ??? thanks
??? ??? animal
|
I think the nut is the most complex item in the build. Many who have built these chucks seem to just buy their nuts (oh, that sounds funny).
toggle quoted message
Show quoted text
??? ??? So , I've been thinking of making a ER40 collet chuck as you folks know form the tread I started last week . I keep thinking the only part that I'm not 100 %
sure I can pull off is the metric threads on the collet nut . So Erik's post got me thinking , why does the chuck need to be threaded for metric threads ? Why cant we make our own nuts & thread them SAE fine ? Does the nut need to be hardened
??
??? ??? Another thought I have been thinking about is how bout a collet chuck that doubles as a collet block ?
??? ??? Thought's ?
??? ??? thanks
??? ??? animal
|
??? ??? So , I've been thinking of making a ER40
collet chuck as you folks know form the tread I started last
week . I keep thinking the only part that I'm not 100 %
sure I can pull off is the metric threads on the
collet nut . So Erik's post got me thinking , why does the chuck
need to be threaded for metric threads ? Why cant we make our
own nuts & thread them SAE fine ? Does the nut need to be
hardened ??
??? ??? Another thought I have been thinking about
is how bout a collet chuck that doubles as a collet block ?
??? ??? Thought's ?
??? ??? thanks
??? ??? animal
|
Re: New member seeking help on Serial Number
Thanks for the help. I’ll be sure to submit the serial number to the site. I have been a member of OWWM for many years and have restored a lot of equipment. Here is the latest.? 
|
Re: ER40 Collet Chuck alternative thought.
I'm honestly not advertising here but one of the reasons I developed my Electronic Lead Screw back in 2008 was so I could do metric threading on my Heavy 10L single lever gearbox.? ? Since then there are a number of other projects out there called ELS's but actually just Electronic gearing.? They put a high count encoder on the spindle with a toothed belt drive pulley to an inexpensive ($30 or so) 800 line encoder.? Then they use the encoder counts with a multiply/divide ratio to drive the stepper motor on the lead screw. ?For metric threads you leave the half nut attached and run the lathe backwards with the tool retracted to return to the start position. ? Mine uses a single pulse per rev with a tiny magnet embedded in the spindle clamp ring under the gearbox cover.? A sensor creates that 1 PPR and with a stable spindle speed is more than up to the task of making nice threads.? No reversing of spindle required.? Instead it stops moving the leadscrew.?? I get prompted to pull the tool out of the work at the END position and then it will move back to the BEGIN position.? I'm then prompted to either put the cross slide back in to a deeper position or told how far to increment the compound after putting the cross slide back at zero. ? I have a taper attachment on my 10L so I've never bothered adding the cross slide motor to it.? One day…? If there is a powered cross slide then the entire threading operation is automatic. /g/E-Leadscrew ? ? John Dammeyer ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Erik S. via groups.io
Sent: February-14-23 6:47 AM
To: [email protected]
Subject: [SouthBendLathe] ER40 Collet Chuck alternative thought.? WRT collet chucks for the lathe.? I've been planning to make the attached adapter for a while to suit my single tumbler heavy 10.? What is stopping me is my inability to cut metric threads so I can use commercially available collet nuts and/or a lack of faith that I can make a collet nut. The design is based off of a 5C collet adapter. (https://www.ebay.com/itm/185766045549?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=g2V2IIY7Qu2&sssrc=2047675&ssuid=67pz0IenSSi&widget_ver=artemis&media=COPY ) This is the variation where I trust the taper to secure the adapter in the spindle similar to a 5C collet adapter.? Alternatively, I could use the 5C collet closer to secure the adapter in the spindle, the threading for that is not shown. I figured that I'd machine the external taper between centers and then insert the adapter into the spindle and machine the internal taper, bore and thread for collet nut. Note that the taper is wrong for the heavy 10 spindle per tooling chart, need to adjust before I make. Any thoughts would be appreciated.
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Re: New member seeking help on Serial Number
On Tue, 14 Feb 2023, John Sullivan wrote: Greetings. I'm a new member here trying to get some more information about my first lathe, a SB 9 Model A.??I want to buy an information card
from the SB site, but not sure what how I should be entering this number. I can't tell if the "O" is the letter "O' or a zero. I have uploaded
some photos. Also curious if this amount of wear is tolerable, and how to compenstate when machining with it,? not that I would do much about the
wear, other than learn to live with it if possible. Serial photo is at the bottom of the post. Thanks again.?
Welcome. I just went thru this same process with my Heavy 10L The original manufacturing serial number cards are now held by Grizzly. The order page is linked on the SB site. Vintagemachinery.org has a wealth of information. Also check out lathes.co.uk Just recently, a member of this forum posted a link to his own personal trove of documentation: wswells.com On that site is a serial number database with a clear description of how to parse it: 13140N (That's a zero) Serial number, post-1947 within the 9 inch series. A Quick change gearbox R Regular sized spindle 8 Model/series revision number Yours is not currently listed in his database, but the two listings which frame it were built in 1948. You might consider sending your photos and card image to him for inclusion. -- Rick Green
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Re: New member seeking help on Serial Number
Hi John, Welcome to the Group. Your lathe is a 1948 Workshop 12-speed Bench Lathe. The 0 is a number: 13140NAR8 ? The wear and how much taper it transfers to the work piece cutting a taper depends on several factors. First thing is to get the lathe leveled up correctly and the tail stock dialed in and then check the alignments and the amount of saddle drop at the wear areas. The saddle will be worn about twice as much as the ridge depth in the Left V-ways from tool cutting pressure. There are write-up’s for leveling and aligning that group members can point you to, when your ready. The ridge doesn’t look to bad for 75 years old. ? ? Steve ? ?
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From: [email protected] < [email protected]> On Behalf Of John Sullivan Sent: Tuesday, February 14, 2023 10:39 AM To: [email protected]Subject: [SouthBendLathe] New member seeking help on Serial Number ? Greetings. I'm a new member here trying to get some more information about my first lathe, a SB 9 Model A.??I want to buy an information card from the SB site, but not sure what how I should be entering this number. I can't tell if the "O" is the letter "O' or a zero. I have uploaded some photos. Also curious if this amount of wear is tolerable, and how to compenstate when machining with it,? not that I would do much about the wear, other than learn to live with it if possible. Serial photo is at the bottom of the post. Thanks again.?
John Sullivan from Maryland
      ?
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Re: ER40 Collet Chuck alternative thought.
The single tumbler gearbox version of the 10L does not make it easy to change the endgears. But, close approximations of some pitches can be cut by swapping the easily replaceable stud gear.
allan
On Tue, Feb 14, 2023 at 11:58 AM DJ Delorie < dj@...> wrote: "Erik S. via " <eriks750=[email protected]> writes:
> What is stopping me is my inability to cut metric threads
My model 34 can cut metric threads - *now*.? I 3D printed two sets of
conversion gears and a thread chase dial, rewired it for power reverse,
and metric threads are no longer a problem.
If you're not too agressive, plastic gears are sufficient.
-- "well, I stand up next to a mountain- and I chop it down with the edge of my hand"
|
New member seeking help on Serial Number
|
Re: ER40 Collet Chuck alternative thought.
"Erik S. via groups.io" <eriks750@...> writes: What is stopping me is my inability to cut metric threads My model 34 can cut metric threads - *now*. I 3D printed two sets of conversion gears and a thread chase dial, rewired it for power reverse, and metric threads are no longer a problem. If you're not too agressive, plastic gears are sufficient.
|
Re: ER40 Collet Chuck alternative thought.
Like Rick, I am also a rank amateur, but without even the benefit of a shop class.? As he said, Make One! You’ll be mighty proud. ?
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On Feb 14, 2023, at 10:53 AM, Rick < vwrick@...> wrote:
On Tue, Feb 14, 2023 at 10:13 AM, Jack Dinan wrote:
Here’s another pathway, suggested by many others as well.
Ten years ago, I had no idea how to cut a metric thread on my SB9A.
The internet and a single article in HSM magazine convinced me that I could.
I learned and fabricated the ER-40 adapter with the M50 x 1.5 thread required for the clamping nut.
It remains the most difficult and most satisfying job I’ve done.
Consider taking the plunge.
This is what I did. ?In the end it wasn’t really difficult, just take your time cutting the threads. Those metric thread are very fine. I made the first one for my SB9A, I made a second one when I got my SB13. I also made some ER40 collet blocks while I had the taper attachment adjusted correctly.
BTW, I am a rank amateur with no training besides high school metal shop 40 years ago. You can do it!
<71A9A68C-2513-4AB5-8F38-030359CFD07C.jpeg>
?
On Feb 14, 2023, at 9:57 AM, Andrei < calciu1@...> wrote:
Why don't you get this, instead??
?
|
|
High Quality 5" 5C Collet Chuck Closer Lathe Plain Back Use 5C Collet.i have adapter plates for 75 to 100 each<br>
|
?
All you need to do is fit a backing plate to it. No threading.?
?
Hi,
?
WRT collet chucks for the lathe.? I've been planning to make the attached adapter for a while to suit my single tumbler heavy 10.? What is stopping me is my inability to cut metric threads so I can use commercially available collet nuts and/or a lack of faith that I can make a collet nut. The design is based off of a 5C collet adapter. (?) This is the variation where I trust the taper to secure the adapter in the spindle similar to a 5C collet adapter.? Alternatively, I could use the 5C collet closer to secure the adapter in the spindle, the threading for that is not shown. I figured that I'd machine the external taper between centers and then insert the adapter into the spindle and machine the internal taper, bore and thread for collet nut.
?
Note that the taper is wrong for the heavy 10 spindle per tooling chart, need to adjust before I make.
?
Any thoughts would be appreciated.
?
Erik S.
|
DocHD
Bill in OKC too
Nick Andrews
