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Re: Hello from Yellowknife
Jerry Durand
¿ªÔÆÌåÓýNote that most of the vendors that will be listed are NOT related to Amazon other than they pay Amazon a fee if you buy the item through them.? Amazon provides NO warranty on the transaction.I found that out the hard way. On 11/18/2012 08:36 AM, CLevinski
wrote:
Hi, All, -- Jerry Durand, Durand Interstellar, Inc. tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand |
Re: Hello from Yellowknife
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 <; olp?s=books&ie=UTF8&qid=1353256081&sr=1-3&condition=new> . 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 [541] --- In 7x12minilathe@..., "John Bernoth" <jbernoth1@...> wrote: Series to be www.bookdepository.co.uk they post free world wide and were WAY cheaper than any where I tried locally, i.e. here in OZ. Regards, |
Re: 1/2" x 13 threads
¿ªÔÆÌåÓýYea 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: 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: |
Re: 1/2" x 13 threads
When in doubt about the yield of a change-gear setup, use the simple arithmetic check equation:
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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 --- In 7x12minilathe@..., WAM <ajawam2@...> wrote:
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Re: 1/2" x 13 threads
Jerry Durand
On one of the calculators (don't remember which one now), it mattered
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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: --
Jerry Durand, Durand Interstellar, Inc. www.interstellar.com tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand |
Re: 1/2" x 13 threads
A JPG comparison of change gear calculators - 7TPI:
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WAM 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. |
Re: 1/2" x 13 threads
¿ªÔÆÌåÓýFor 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 |
Re: 1/2" x 13 threads
¿ªÔÆÌåÓý40,65 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
|
Re: 1/2" x 13 threads
--- In 7x12minilathe@..., "Michael Jablonski" <michaeljab@...> wrote:
Michael, is your signature block on your post comming from your e-mail client? Chuck |
Re: 1/2" x 13 threads
--- In 7x12minilathe@..., "Michael Jablonski" <michaeljab@...> wrote:
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 |
Re: 1/2" x 13 threads
¿ªÔÆÌåÓýThe
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
|
Re: 1/2" x 13 threads
--- In 7x12minilathe@..., "chucketn" <chunk07@...> wrote:
Corection: Third gear set should read 80 any 65. |
1/2" x 13 threads
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 |
Re: Tail stock alignment on Seig lathes
GadgetBuilder,
Thanks for the links to your site. I am grateful to be a member of such a good group of people with similar interest to mine. It is through this interaction with one another that ideas are exchanged which help promote the hobby we all share. I am one who likes to gather as much info as possible before making a final decision on which way to proceed. It also gets me thinking "outside the box" that I often find myself in. In the end I will probably arrive at some hybrid solution to the problem of tailstock alignment that i can live with. I will share it with the group when I finally get there. Dick |
Re: Tail stock alignment on Seig lathes
stan campbell
Hi group! ? The plans for an offset lathe center are here.? There are lots of other neat plans there too. When I got my Logan, it did not have a tailstock, so I bought one. 6 months later the guy I bought the lathe from called and said he found the original. Now I have 2. Is there any downside to changing tailstocks? One for tapers, one aligned? I know that it is not a 7x12, but y'all are a knowledgeable group! ? STAN CAMPBELL |
Re: Tail stock alignment on Seig lathes
MERTON B BAKER
?
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Remember to keep that point lubed when in use;
remember also that when turning tapers between centers, the center pockets in
the work are not aligned with the centers in the spindles. Grease is better than
oil, in this case.? Ball end centers, and a ball bearing one in the TS, if
you do a lot of tapers.
?
Mert
?
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Re: Tail stock alignment on Seig lathes
The work is running at an angle to the spindle when using the offset tailstock method of taper turning. This angle causes the points to mate poorly with the sockets created by a center drill.
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Rather than a point, another center drill socket is commonly used with a hardened ball between the two sockets at each end of the work. Some discussion here: < > John --- In 7x12minilathe@..., "Larry White" <lj123white@...> wrote:
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Re: Tail stock alignment on Seig lathes
Larry White
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Mike
Thanks for the pointers.? After getting the
idea from Mert earlier, I already have one started.? I am going to try O1
for the point though.
Thanks
Larry
?
?
?
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Re: Tail stock alignment on Seig lathes
Mert, I do the same thing except the ?MT#3 on the boring head fits my 10x22 tail stock. I originally bought it for my mini-mill.Rarely use it on the mill but every so often on the lathe.I ?turned the point on a short length of A-1 and hardened the point.? mike
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