Author Topic: Southbend Screwcutting clutch  (Read 31031 times)

Offline steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 11717
  • Central Massachusetts, USA
Southbend Screwcutting clutch
« on: January 15, 2014, 08:22:53 PM »
Hey Graham,

24 tooth on the spindle gear

18 DP  14 1/2 PA

I'll get you the pictures.

The thread is yours :praise2:

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 11717
  • Central Massachusetts, USA
Re: Southbend Screwcutting clutch
« Reply #1 on: January 16, 2014, 12:59:15 AM »
Here's some "stock" photo's    Let me know what works and what doesn't.   I can take more, but this will help narrow down exactly the views you need.























"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Bezalel

  • Full Member
  • ****
  • Posts: 376
  • - Skype:Bezalel2000
Re: Southbend Screwcutting clutch
« Reply #2 on: January 16, 2014, 06:59:21 AM »
I been waiting for this with keen interest.
 
Thanks Dave, Gray   :ThumbsUp:
 
Bez
Queensland - wet one day, humid the next

Offline steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 11717
  • Central Massachusetts, USA
Re: Southbend Screwcutting clutch
« Reply #3 on: January 16, 2014, 10:17:18 AM »
Those of you with Boxford or Hercus....tell us if your's are different than what you see here.

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline ColH

  • Full Member
  • ****
  • Posts: 55
  • Geelong, Victoria, Australia
Re: Southbend Screwcutting clutch
« Reply #4 on: January 16, 2014, 10:57:46 AM »
I have a hercus 260 and will post some photos tomorrow.

Col

Ps. I also have the parts manual with drawings so will scan and post those as well.
« Last Edit: January 16, 2014, 11:29:52 AM by ColH »
ColH

Offline Graham Meek

  • Full Member
  • ****
  • Posts: 310
Re: Southbend Screwcutting clutch
« Reply #5 on: January 16, 2014, 11:30:40 AM »
Hi Dave

I wish all the lathes I have designed clutches for were made by Southbend, that large flat vertical surface is a first. I am confident from your photographs that this is going to work and we can get down to the task of measuring the back end of the lathe, very nice condition by the way. I will do a little drawing of the dimensions I need and will post it on here, this will help others who want to make a version for their particular machines to see how I go about it.

My best regards
Gray,


Offline steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 11717
  • Central Massachusetts, USA
Re: Southbend Screwcutting clutch
« Reply #6 on: January 16, 2014, 12:26:35 PM »
Good to hear Gray!....

Let me know!

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 11717
  • Central Massachusetts, USA
Re: Southbend Screwcutting clutch
« Reply #7 on: January 16, 2014, 01:50:12 PM »
Graham

" the number of teeth on the Mandrel gear as well as the numbers of teeth in the tumbler reverse and very important which position the tumbler reverse is in when turning towards the headstock."

I will get the tooth counts of all the gears later this evening.....I had to take my Daughter to Basketball practice and my son to the hobby shop to pick up his new "drift car".... :ShakeHead:.....He bought that one....not me!

But       the upper hole is the "Ahead" or "feed towards the headstock" position.

Be Known!.....there is an inherant step down ratio in the basic train of the SB, which the gearbox steps back up....I did a thread on that....I'll dig that up and post a link here.

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 11717
  • Central Massachusetts, USA
Re: Southbend Screwcutting clutch
« Reply #8 on: January 16, 2014, 01:57:21 PM »
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 14588
  • Hampshire, england.
Re: Southbend Screwcutting clutch
« Reply #9 on: January 16, 2014, 02:22:38 PM »
 :embarassed: Do I get the idea that someone is a little enthusiastic about adding one of these to his Samantha Belle

Jo
Enjoyment is more important than achievement.

Online sco

  • Full Member
  • ****
  • Posts: 1689
  • Location: Northants UK
Re: Southbend Screwcutting clutch
« Reply #10 on: January 16, 2014, 02:47:05 PM »
Having watched the youtube vid of the Hardinge screwcutting action I'm not surprised.

Simon.
Ars longa, vita brevis.

Offline steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 11717
  • Central Massachusetts, USA
Re: Southbend Screwcutting clutch
« Reply #11 on: January 16, 2014, 03:08:18 PM »
If you haven't used a Hardinge to thread.....you won't understand Jo....it really is sweet.

I think it's a cool design too......

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 14588
  • Hampshire, england.
Re: Southbend Screwcutting clutch
« Reply #12 on: January 16, 2014, 03:16:00 PM »
I thought I had mentioned what was second on this year's list of must have machine tools  :mischief:

Just printing the manual and part list out for it  :whoohoo:

Jo
Enjoyment is more important than achievement.

Offline Stuart

  • Full Member
  • ****
  • Posts: 1785
  • Tilchestune UK
Re: Southbend Screwcutting clutch
« Reply #13 on: January 16, 2014, 03:47:06 PM »
So when is it being delivered ,it won't fit in the car boot  :mischief:

Dave just read your thread on the gear ratio , interesting , mine is one to one for the TB to spindle , but I am sure that Gray will sort it out, from my very limited knowledge it may be a bit tight for the clutch pack mine lives inside a 38 t double gear with the selector between.
The S7 has a 30 t pair in the same position,  but are 20 DP
Until you get past the tumbler reverser then they are 14.5 DP after that.


If you can get hold of Gray s book it will help with the GA and it assembly routine
It's about 13quid here



Stuart
« Last Edit: January 16, 2014, 03:53:08 PM by Stuart »
My aim is for a accurate part with a good finish

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 14588
  • Hampshire, england.
Re: Southbend Screwcutting clutch
« Reply #14 on: January 16, 2014, 03:49:42 PM »
 :embarassed: The 70 comes first. I have found the one.

But  :'( my friend who owns it has a family crises which takes priority.

Jo
Enjoyment is more important than achievement.