Date   

Re: reverse tumbler gears

ken campbell
 

on my 13 incher,  i use black chain oil on my gears and gear shafts ... it sticks ...and contains moly, for extra lube.  the moly embeds in the metal and is not a bad dry lube all by itself.  i even spray the quick change gears from under the box.

do not use it in the wick lubers though ... it is more a grease than light oil and won't wick.  i use mobil products for the wicks.

i take my spindle out about once a year and inspect the bearings ... i work some moly into the spindle bearings before i replace the spindle ... 18 years so far and the bearings look like new.

oh, the bad news .. this black stuff is dirty and persistent .... and stains everything.  remove it from your hands with soap and water .

oh, adjust the backlash by running a piece of copy paper between the gears as you tighten them ... you get about 2 to 3 thousandth clearance.  better slightly too much than no clearance.


Re: reverse tumbler gears

oscar kern <kernbigo@...>
 






Re: reverse tumbler gears

Rick
 


Re: Stay Safe!

Andrei
 

Thanks, Jim. 

It is easy to get hacked nowadays. All you need to do is click on a link that looks familiar but secretly leads to a hacker's evil empire. 


From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> on behalf of Jim_B <jim@...>
Sent: Thursday, July 23, 2020 1:35 PM
To: SouthBendLathe@groups.io <SouthBendLathe@groups.io>
Subject: Re: [SouthBendLathe] Stay Safe!
 
He has been a member for months or so. Probably his account has been compromised. He has been put on moderation. 

On Jul 23, 2020, at 1:23 PM, Andrei <calciu1@...> wrote:

somebody please block this guy so he can't scam anyone in the group

From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> on behalf of bristolfarmer <bristolfarmer@...>
Sent: Thursday, July 23, 2020 1:02 PM
Subject: [SouthBendLathe] Stay Safe!
 
How are you doing today?

Hope this email finds you well?

Can you do me a favor?

Thanks!

Dave Streeter 



Jim B.





--
Jim B


Re: Stay Safe!

Jim_B
 

He has been a member for months or so. Probably his account has been compromised. He has been put on moderation. 

On Jul 23, 2020, at 1:23 PM, Andrei <calciu1@...> wrote:

somebody please block this guy so he can't scam anyone in the group

From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> on behalf of bristolfarmer <bristolfarmer@...>
Sent: Thursday, July 23, 2020 1:02 PM
Subject: [SouthBendLathe] Stay Safe!
 
How are you doing today?

Hope this email finds you well?

Can you do me a favor?

Thanks!

Dave Streeter 



Jim B.





--
Jim B


Re: Stay Safe!

Andrei
 

somebody please block this guy so he can't scam anyone in the group

From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> on behalf of bristolfarmer <bristolfarmer@...>
Sent: Thursday, July 23, 2020 1:02 PM
Subject: [SouthBendLathe] Stay Safe!
 
How are you doing today?

Hope this email finds you well?

Can you do me a favor?

Thanks!

Dave Streeter 



Stay Safe!

bristolfarmer
 

How are you doing today?

Hope this email finds you well?

Can you do me a favor?

Thanks!

Dave Streeter 



Re: reverse tumbler gears

John Gallo
 

Gary,

I am not sure how to post this link, but if you go to E-Bay and search South Bend Lathe, heavy 10, it is on the first page towards the bottom. I wish I could make it easier for you.

John


Re: reverse tumbler gears

david pennington
 

The answer to the question, whether substituting ball bearings for the journal bearings will reduce gear train noise, is likely "no".

A smooth, properly dimensioned and lubricated journal bearing is as quiet as quiet can be, mostly because there are no additional moving parts.

My lathe is a 1946 9C, and I've recently been studying the issue of gear train noise in setting up the banjo. My first approach to the issue--years ago--was to compute the theoretical center-to-center spacing, only to discover that's almost impossible to measure. For most of the eight years I've had the lathe, I've only used gears when threading, and then I've experimented till things weren't objectionably loud. Recently, I've tried something new: mimic the factory.

It occurred to me that the gear spacing from the factory--tumbler gears and the stud gear--are most likely right. There's a tiny bit of backlash (slop) in the meshing of those gears, and there's an approximate percentage of tooth length engagement.

So on the banjo, I set the gears to have about the same tooth length engagement and then check that there is a "tiny" bit of backlash. Right now, it's setup for fine cut, which involves the maximum number of gear meshing (5). The gear train noise is 'there', but it is smooth and not objectionable.

At the moment, the gears are essentially dry, though not "brake cleaner clean", as that would promote rust. When fully prepared for use, the gears will have a film of 95 wt gear lube. Yes, some oil will get thrown off, but that's what the gear cover is for. :)

Dave

David W. Pennington
Denver, Colorado
720-442-3744


On Thursday, July 23, 2020, 03:43:56 AM MDT, John Gallo via groups.io <johnnyblock1@...> wrote:


Mark,

Mine is a 10L.

John


Re: reverse tumbler gears

Gary Johnson
 

can’t seem to find the item on Ebay. Can you post a link?

There are a couple of discussions on how to make the conversion on Practical Machinist. Basically it eliminates the need for lubrication but nobody there is claiming a performance improvement. 

https://www.practicalmachinist.com/vb/south-bend-lathes/ball-bearing-tumbler-gears-10l-281847/

-Gary


Re: reverse tumbler gears

John Gallo
 

Mark,

Mine is a 10L.

John


Re: reverse tumbler gears

Mark Z
 

I have exactly the same question!  Mine is a 16" - what is yours?


Re: 13" in Michigan for parts

david_g4000
 

Personally, I love my 13" single tumbler (Model 'N') for it's uniqueness and accuracy. Glad others are keeping the single tumblers alive too.

On 7/21/2020 2:02 PM, vern bartlett wrote:
It's ok, there are so many to save and I'm sure their will be another. Vern

On Tue, Jul 21, 2020, 12:52 PM Todd <belvedere66@...> wrote:
Seems there are a bunch of folks needing parts from this 13".� �I figured I would have the dilemma of selling it as a whole to be resurrected, or as an organ donor.�

�I think an organ donor is the best course to save many.�

�Vern, I'm sorry. I feel compelled to help keep as many of these running as possible.


13" in Michigan & several whole ones in Ohio

Richard
 

Gentlemen,

I have several whole 9" plus one 11" that were completed with organs from various donors found on ebay and from friends on this list. I am nearing a point where these SB Lathes will be better off in the hands of others who can take better care of them, fellows such as you.
If you live near Toledo, Ohio, and have an interest in one, or the lot of them, please give a shout.  They are all made before 1931, the oldest an 11" X 5' made in 1912.
Photos and details on request, open to reasonable offers.

Richard Sheckler
Wayne, Ohio


From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> on behalf of vern bartlett <bartlettvern@...>
Sent: Tuesday, July 21, 2020 2:02 PM
To: SouthBendLathe@groups.io <SouthBendLathe@groups.io>
Subject: Re: [SouthBendLathe] 13" in Michigan for parts
 
It's ok, there are so many to save and I'm sure their will be another. Vern

On Tue, Jul 21, 2020, 12:52 PM Todd <belvedere66@...> wrote:
Seems there are a bunch of folks needing parts from this 13".   I figured I would have the dilemma of selling it as a whole to be resurrected, or as an organ donor. 

 I think an organ donor is the best course to save many. 

 Vern, I'm sorry. I feel compelled to help keep as many of these running as possible.


Re: 13" in Michigan for parts

vern bartlett
 

It's ok, there are so many to save and I'm sure their will be another. Vern


On Tue, Jul 21, 2020, 12:52 PM Todd <belvedere66@...> wrote:
Seems there are a bunch of folks needing parts from this 13".   I figured I would have the dilemma of selling it as a whole to be resurrected, or as an organ donor. 

 I think an organ donor is the best course to save many. 

 Vern, I'm sorry. I feel compelled to help keep as many of these running as possible.


Re: 13" in Michigan for parts

Todd
 

Seems there are a bunch of folks needing parts from this 13".   I figured I would have the dilemma of selling it as a whole to be resurrected, or as an organ donor. 

 I think an organ donor is the best course to save many. 

 Vern, I'm sorry. I feel compelled to help keep as many of these running as possible.


Re: 13" in Michigan for parts

vern bartlett
 

Sent an email 


On Tue, Jul 21, 2020, 10:57 AM slash2nut via groups.io <lore724=aol.com@groups.io> wrote:
Vern
I think it is belvedere66@... that is listed below.

I live in Chelsea MI and was wondering if you have anything for my heavy 10.  I just got it and am looking for mt2 centers and so forth.

Thanks,
Dave

-----Original Message-----
From: vern bartlett <bartlettvern@...>
To: SouthBendLathe@groups.io
Sent: Tue, Jul 21, 2020 11:51 am
Subject: Re: [SouthBendLathe] 13" in Michigan for parts

What's your email address?

On Tue, Jul 21, 2020, 8:32 AM Todd <belvedere66@...> wrote:
Vern, message me and we can discuss.


Re: 13" in Michigan for parts

Bill in OKC too
 

MT2 centers are available on Amazon, ebay, and all the various tool places. I've bought some of them myself from Amazon and CDCO Tool, among other places. If you're actually planning on turning between centers, you might also want what's called a "half-center. One side of it is cut away to let you face a part that is held between centers. Here's an example: MT2 Carbide Tipped Half Nothced Dead Center Morse Taper 2 CNC Lathe Tool


Bottom photo in the sidebar give dimensions for this one, and you could buy or make a regular center, and then grind or mill it to be a half-center yourself. 

Bill in OKC

William R. Meyers, MSgt, USAF(Ret.)


A human being should be able to change a diaper, plan an invasion,
butcher a hog, conn a ship, design a building, write a sonnet, balance
accounts, build a wall, set a bone, comfort the dying, take orders,
give orders, cooperate, act alone, solve equations, analyze a new
problem, pitch manure, program a computer, cook a tasty meal, fight
efficiently, die gallantly. Specialization is for insects.
LAZARUS LONG (Robert A. Heinlein)





On Tuesday, July 21, 2020, 10:57:33 AM CDT, slash2nut via groups.io <lore724@...> wrote:


Vern
I think it is belvedere66@... that is listed below.

I live in Chelsea MI and was wondering if you have anything for my heavy 10.  I just got it and am looking for mt2 centers and so forth.

Thanks,
Dave

-----Original Message-----
From: vern bartlett <bartlettvern@...>
To: SouthBendLathe@groups.io
Sent: Tue, Jul 21, 2020 11:51 am
Subject: Re: [SouthBendLathe] 13" in Michigan for parts

What's your email address?

On Tue, Jul 21, 2020, 8:32 AM Todd <belvedere66@...> wrote:
Vern, message me and we can discuss.


Re: 13" in Michigan for parts

slash2nut
 

Vern
I think it is belvedere66@... that is listed below.

I live in Chelsea MI and was wondering if you have anything for my heavy 10.  I just got it and am looking for mt2 centers and so forth.

Thanks,
Dave

-----Original Message-----
From: vern bartlett <bartlettvern@...>
To: SouthBendLathe@groups.io
Sent: Tue, Jul 21, 2020 11:51 am
Subject: Re: [SouthBendLathe] 13" in Michigan for parts

What's your email address?

On Tue, Jul 21, 2020, 8:32 AM Todd <belvedere66@...> wrote:
Vern, message me and we can discuss.


Re: 13" in Michigan for parts

vern bartlett
 

What's your email address?


On Tue, Jul 21, 2020, 8:32 AM Todd <belvedere66@...> wrote:
Vern, message me and we can discuss.