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I am going to make one or more of those thread puzzles with the captive nut. I chose 1/2" x 13 tpi because I have several nuts, and a tap available. Just watching "High Plains Drifter for the umpteenth time, and decided to look up the change gears for 13 tpi. LMS Gear Calculator lists 20,65,80, 20 or 40,65,80,20 or 80, any, 80.
Not at the machine at the moment, and was wondering how these combo's fit. Anyone tried 13 tpi on a 7x lathe? I will set it up tomorrow when the frost is off the pumpkin. Was just wondering...
Chuck
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--- In 7x12minilathe@..., "chucketn" <chunk07@...> wrote:
I am going to make one or more of those thread puzzles with the captive nut. I chose 1/2" x 13 tpi because I have several nuts, and a tap available. Just watching "High Plains Drifter for the umpteenth time, and decided to look up the change gears for 13 tpi. LMS Gear Calculator lists 20,65,80, 20 or 40,65,80,20 or 80, any, 80.
Not at the machine at the moment, and was wondering how these combo's fit. Anyone tried 13 tpi on a 7x lathe? I will set it up tomorrow when the frost is off the pumpkin. Was just wondering...
Chuck
Corection: Third gear set should read 80 any 65.
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The
threading gear label on the front of my machine shows a 13 TPI using 40,65
60,30.
You
don't mention the make of lathe you have, or if it has a 16 TPI lead screw or a
1.5 mm lead screw.
Michael - USA
Micro-Mark MicroLux
7x16
toggle quoted message
Show quoted text
?
--- In 7x12minilathe@...,
"chucketn" wrote:
>
> I am going to make one
or more of those thread puzzles with the captive nut. I chose 1/2" x 13 tpi
because I have several nuts, and a tap available. Just watching "High Plains
Drifter for the umpteenth time, and decided to look up the change gears for 13
tpi. LMS Gear Calculator lists 20,65,80, 20 or 40,65,80,20 or 80, any,
80.
> Not at the machine at the moment, and was wondering how these
combo's fit. Anyone tried 13 tpi on a 7x lathe? I will set it up tomorrow when
the frost is off the pumpkin. Was just wondering...
>
>
Chuck
>
Corection: Third gear set should read 80 any
65.
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--- In 7x12minilathe@..., "Michael Jablonski" <michaeljab@...> wrote:
The threading gear label on the front of my machine shows a 13 TPI using
40,65 60,30.
You don't mention the make of lathe you have, or if it has a 16 TPI lead
screw or a 1.5 mm lead screw.
I have a MicroMark 7x14, with 16 tpi leadscrew. Sorry, thought it was in my signature. Now I see I don't have one here! Chuck
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--- In 7x12minilathe@..., "Michael Jablonski" <michaeljab@...> wrote:
The threading gear label on the front of my machine shows a 13 TPI using
40,65 60,30.
You don't mention the make of lathe you have, or if it has a 16 TPI lead
screw or a 1.5 mm lead screw.
Michael - USA
Micro-Mark MicroLux 7x16
Michael, is your signature block on your post comming from your e-mail client? Chuck
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The GearsVB6.exe program I downloaded agrees with 2 sets from LMS Gears calculator, and Michael, plus 6 more. It does not list any with the 20 tooth gear as LMS does. Any other change gear calculators out there?
Download the Gearsvb6 in a zip file here:
Chuck
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40,65 60,30 should work fine for you for a 13 TPI
thread.
And yes my signature is added to my emails using
Outlook.
Michael - USA
Micro-Mark MicroLux
7x16
toggle quoted message
Show quoted text
?
--- In 7x12minilathe@...,
"Michael Jablonski" wrote:
>
> The
threading gear label on the front of my machine shows a 13 TPI using
>
40,65 60,30.
> You don't mention the make of lathe you have, or if it
has a 16 TPI lead
> screw or a 1.5 mm lead screw.
>
I have a
MicroMark 7x14, with 16 tpi leadscrew.
Sorry, thought it was in my
signature. Now I see I don't have one here!
Chuck
|
For the LMS lathes, I found that the LMS online calc works the best.? I
tried varmint al's buddy's and it didn't agree with the LMS for a lot
of the threads I needed to cut.
There's this site:
It has a TPI calculator that shows the resultant thread for a
particular change gear setup. The LMS seems to agree with it.
I asked Chris if he had an off line version of his; he said no...?
What's interesting is that the LMS manual lists gear combo's that
differ from the LMS on line calculator
Here's a link to a spreadsheet that has most of the LMS calculator
outputs:
older XLS:
PDF:
Don't ask how I did this - it was a pain. I sat there and copy-pasted
every one of those... not fun.
This is more a more comprehensive list than the one in the LMS manual -
for instance, 4 TPI in the on line LMS calc doesn't even list the one
in the manual, and can actually? (tough on the motor tho) be installed
without interference.
The gearsvb6 didn't seem to agree with the ones in the spreadsheet I
made from the on line LMS calc. Same list of gears:
Metal changeI received from LMS:
20
20
21
30
35
40
40
45
50
55
57
60
65
80
80
Then, there was a guy from Russia that posted bak on 11-10 :
He listed a gear calculator :
Guitar means "banjo" in Russian.? I emailed him to clarify this:
And when you mention "guitar" do you mean "banjo" ?
in russian this word also means "gearbox moving plate" for lathe.
NOTE: if you use his, just delete the lang.txt file - it will default
to english. His atually shows (for his lathe) the combonations that
interefere. Pretty cool. Didn't match up with the LMS.
I really wish that Chris would release a simple .exe type off line of
his calculator. From my experience it looks like it lists stuff you can
actually put on the LMS - style lathe.
Michael Jablonski wrote:
40,65 60,30 should work fine for you for a 13 TPI thread.
And yes my signature is added to my emails using Outlook.
Michael - USA
Micro-Mark MicroLux 7x16
-----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...]
On Behalf Of chucketn
Sent: Saturday, November 17, 2012 6:16 PM
To: 7x12minilathe@...
Subject: [7x12minilathe] Re: 1/2" x 13 threads
--- In 7x12minilathe@...
, "Michael Jablonski"
wrote:
The threading gear label on the front of my machine shows a 13 TPI using
40,65 60,30.
You don't mention the make of lathe you have, or if it has a 16 TPI lead
screw or a 1.5 mm lead screw.
I have a MicroMark 7x14, with 16 tpi leadscrew.
Sorry, thought it was in my signature. Now I see I don't have one here!
Chuck
|
A JPG comparison of change gear calculators - 7TPI:
WAM wrote:
toggle quoted message
Show quoted text
For the LMS lathes, I found that the LMS online calc works the best. I tried varmint al's buddy's and it didn't agree with the LMS for a lot of the threads I needed to cut.
There's this site:
It has a TPI calculator that shows the resultant thread for a particular change gear setup. The LMS seems to agree with it.
I asked Chris if he had an off line version of his; he said no... What's interesting is that the LMS manual lists gear combo's that differ from the LMS on line calculator
Here's a link to a spreadsheet that has most of the LMS calculator outputs:
older XLS:
PDF:
Don't ask how I did this - it was a pain. I sat there and copy-pasted every one of those... not fun.
This is more a more comprehensive list than the one in the LMS manual - for instance, 4 TPI in the on line LMS calc doesn't even list the one in the manual, and can actually (tough on the motor tho) be installed without interference.
The gearsvb6 didn't seem to agree with the ones in the spreadsheet I made from the on line LMS calc. Same list of gears:
Metal changeI received from LMS:
20
20
21
30
35
40
40
45
50
55
57
60
65
80
80
Then, there was a guy from Russia that posted bak on 11-10 :
He listed a gear calculator :
Guitar means "banjo" in Russian. I emailed him to clarify this:
And when you mention "guitar" do you mean "banjo" ?
in russian this word also means "gearbox moving plate" for lathe.
NOTE: if you use his, just delete the lang.txt file - it will default to english. His atually shows (for his lathe) the combonations that interefere. Pretty cool. Didn't match up with the LMS.
I really wish that Chris would release a simple .exe type off line of his calculator. From my experience it looks like it lists stuff you can actually put on the LMS - style lathe.
Michael Jablonski wrote:
40,65 60,30 should work fine for you for a 13 TPI thread.
And yes my signature is added to my emails using Outlook.
Michael - USA
Micro-Mark MicroLux 7x16
-----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...]
On Behalf Of chucketn
Sent: Saturday, November 17, 2012 6:16 PM
To: 7x12minilathe@...
Subject: [7x12minilathe] Re: 1/2" x 13 threads
--- In 7x12minilathe@...
<mailto:7x12minilathe%40yahoogroups.com> , "Michael Jablonski"
<michaeljab@...> wrote:
The threading gear label on the front of my machine shows a 13 TPI using
40,65 60,30.
You don't mention the make of lathe you have, or if it has a 16 TPI lead
screw or a 1.5 mm lead screw.
I have a MicroMark 7x14, with 16 tpi leadscrew.
Sorry, thought it was in my signature. Now I see I don't have one here!
Chuck
|
On one of the calculators (don't remember which one now), it mattered
which order the gears available were listed. I found that out when I
added an extra gear I have and depending on where I inserted it, the
recommendations (and accuracy of the threads) changed.
toggle quoted message
Show quoted text
On 11/18/2012 06:49 AM, WAM wrote: A JPG comparison of change gear calculators - 7TPI:
--
Jerry Durand, Durand Interstellar, Inc. www.interstellar.com
tel: +1 408 356-3886, USA toll free: 1 866 356-3886
Skype: jerrydurand
|
When in doubt about the yield of a change-gear setup, use the simple arithmetic check equation:
LeadScrew tpi x D / C x B / A = spindle tpi, where A, B, C, & D are the tooth counts of the individual gears in the train. A is the stud gear, D is the Lead Screw gear, B and C are the adjustable pair of gears coupled together on the auxiliary axle.
When applied to the gear options in the first message of this topic, you can see that two of the listings do not equal 13 tpi.
HTH
toggle quoted message
Show quoted text
--- In 7x12minilathe@..., WAM <ajawam2@...> wrote:
For the LMS lathes, I found that the LMS online calc works the best. I
tried varmint al's buddy's and it didn't agree with the LMS for a lot of
the threads I needed to cut.
There's this site:
It has a TPI calculator that shows the resultant thread for a particular
change gear setup. The LMS seems to agree with it.
I asked Chris if he had an off line version of his; he said no...
What's interesting is that the LMS manual lists gear combo's that differ
from the LMS on line calculator
Here's a link to a spreadsheet that has most of the LMS calculator outputs:
older XLS:
PDF:
Don't ask how I did this - it was a pain. I sat there and copy-pasted
every one of those... not fun.
This is more a more comprehensive list than the one in the LMS manual -
for instance, 4 TPI in the on line LMS calc doesn't even list the one in
the manual, and can actually (tough on the motor tho) be installed
without interference.
The gearsvb6 didn't seem to agree with the ones in the spreadsheet I
made from the on line LMS calc. Same list of gears:
Metal changeI received from LMS:
20
20
21
30
35
40
40
45
50
55
57
60
65
80
80
Then, there was a guy from Russia that posted bak on 11-10 :
He listed a gear calculator :
Guitar means "banjo" in Russian. I emailed him to clarify this:
And when you mention "guitar" do you mean "banjo" ?
in russian this word also means "gearbox moving plate" for lathe.
NOTE: if you use his, just delete the lang.txt file - it will default to
english. His atually shows (for his lathe) the combonations that
interefere. Pretty cool. Didn't match up with the LMS.
I really wish that Chris would release a simple .exe type off line of
his calculator. From my experience it looks like it lists stuff you can
actually put on the LMS - style lathe.
Michael Jablonski wrote:
40,65 60,30 should work fine for you for a 13 TPI thread.
And yes my signature is added to my emails using Outlook.
Michael - USA
Micro-Mark MicroLux 7x16
-----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...]
On Behalf Of chucketn
Sent: Saturday, November 17, 2012 6:16 PM
To: 7x12minilathe@...
Subject: [7x12minilathe] Re: 1/2" x 13 threads
--- In 7x12minilathe@...
<mailto:7x12minilathe%40yahoogroups.com> , "Michael Jablonski"
<michaeljab@> wrote:
The threading gear label on the front of my machine shows a 13 TPI using
40,65 60,30.
You don't mention the make of lathe you have, or if it has a 16 TPI lead
screw or a 1.5 mm lead screw.
I have a MicroMark 7x14, with 16 tpi leadscrew.
Sorry, thought it was in my signature. Now I see I don't have one here!
Chuck
|
Yea I tried that with the GEARSVB6 one and it didn't seem to matter..
One issue was running it twice (hit calc twice with the 7TPI example;
16TPI LS) reduced the set of possible change gears.
Also make sure to use the exit function on it - if you just close the
box it stays in memory (at least on my XP machine).
I ended up with a about 6 instances of? GEARSVB6.EXE in Task Mangler..
There's also this site
He has a DOS based one as well as one somebody submitted that runs in
Windows. The Windows one require converting some of the values to
metric when setting up a new lathe.
Lots of great calcs on that site. On the DOS one, I made a batch file
that called it, then notepad to display CHANGE.OUT file.
Cool that he includes the CHANGE.C and CHANGEX.C source files...
Jerry Durand wrote:
toggle quoted message
Show quoted text
On one of the calculators (don't remember which one now), it mattered
which order the gears available were listed. I found that out when I
added an extra gear I have and depending on where I inserted it, the
recommendations (and accuracy of the threads) changed.
On 11/18/2012 06:49 AM, WAM wrote:
A JPG comparison of change gear calculators - 7TPI:
|
On Sun, 18 Nov 2012, chucketn wrote:
The GearsVB6.exe program I downloaded agrees with 2 sets from LMS Gears calculator, and Michael, plus 6 more. It does not list any with the 20 tooth gear as LMS does. Any other change gear calculators out there?
Download the Gearsvb6 in a zip file here:
Chuck
I have one for the 7x and 8x at Vince. -- Michigan VHF Corp. The Foggy Mist Emporium
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