Looks like I'm going to be buying a Machinists Handbook, anyone have any preference of one over another? Is one author considered better than the others?


I have a 8.5x16 lathe, no mill.

Do I need a more current version, or is the massive one from 1979 (Erik Oberg) going to cover all the basics OK?

Wes

Hmmm... apparently the image was too large. Let me try again.



Hi, All,

I just discovered today that you can order from
www.bookdepository.co.uk THROUGH Amazon.com. I ordered the "Milling:
A Complete Course" via Amazon here . When you find the book you want,
click on the "XX new from $Y.YY" link and it will take you to a list
of the other places you can purchase it. See the red highlighted area
below.

Charlie

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:


    

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

A JPG comparison of change gear calculators - 7TPI:

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

-----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

-----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...] On Behalf Of chucketn
Sent: Saturday, November 17, 2012 5:06 PM
To: 7x12minilathe@...
Subject: [7x12minilathe] Re: 1/2" x 13 threads

?

--- 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.