Project of the Month built by gbritnell

Help Support Home Model Engine Machinist by donating using the link above or becoming a Supporting Member.
Home Model Engine Machinist > The Tools and Tips > Tools > Back plate

Reply
 
Thread Tools
Old 11-07-2017, 07:10 PM   #1
wesley
 
Join Date: Aug 2009
Posts: 49
Liked 3 Times on 3 Posts
Likes Given: 8

Default Back plate

Hi all ,having a real hard job over here in the uk to find a chuck backplate with 2 1/4" x 6tpi thread for my old southbend,would be more than happy with a used one but no luck as yet,want to fit a smaller 4 jaw chuck on the lathe,maybe l will have to make one at this rate grrrrrr


wesley is offline  
 
Reply With Quote
Old 11-07-2017, 10:03 PM   #2
bazmak
BAZMAK
HMEM_SUPPORTER.png
 
bazmak's Avatar
 
Join Date: Dec 2012
Location: adelaide south australia
Posts: 1,805
Liked 959 Times on 552 Posts
Likes Given: 771

Default

eadsy to make one so make 2. Make one with spigot and drillings to suit
cheap chinese chucks etc


bazmak is offline  
 
Reply With Quote
Old 11-07-2017, 11:14 PM   #3
MRA
 
Join Date: Feb 2012
Posts: 88
Liked 13 Times on 12 Posts
Likes Given: 2

Default

I had a backplate for my Boxford which someone had cut on the lathe - it was very tight on the spindle. So as not to mess it up, I waited until a cheap (well, comparatively cheap) tap came up on ebay. 2 1/4 x 6 is BSF, if the thread form is right. There are taps on ebay, but they're not cheap! Maybe you could sell it afterwards...
MRA is offline  
 
Reply With Quote
Old 11-08-2017, 06:27 AM   #4
bazmak
BAZMAK
HMEM_SUPPORTER.png
 
bazmak's Avatar
 
Join Date: Dec 2012
Location: adelaide south australia
Posts: 1,805
Liked 959 Times on 552 Posts
Likes Given: 771

Default

I went the cheap way,bought a hex fullnut,welded it to a plate and
machine up as required
bazmak is offline  
TonyM Likes This 
Reply With Quote
Old 11-09-2017, 09:05 AM   #5
abby
 
Join Date: Apr 2009
Posts: 328
Liked 80 Times on 60 Posts
Likes Given: 8

Default

That sounds very strange to me , what size Southbend do you have ? I have only come across 1 1/2" x 8 tpi spindle , same with Boxford , no surprise as it is a Southbend copy .
The Boxford 4.5 " precision lathe has a 2" x 7 tpi spindle.
Dan
abby is offline  
 
Reply With Quote
Old 11-09-2017, 07:10 PM   #6
wesley
 
Join Date: Aug 2009
Posts: 49
Liked 3 Times on 3 Posts
Likes Given: 8

Default

hi abby it a 14 1/2 x 16 southbend made in 1942 and the spindle is indeed 2 1/4" x 6tpi and also has a funny size spindle taper so l tend to use a small 3 jaw chuck with a centre in it to turn between centres ,think l will end up buying a cast blank an have ago at making my own back plate.


wesley is offline  
 
Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
I'm back....... John Rudd Introduction 3 06-10-2013 05:45 PM
chuck back plate adapters petertha Tools 5 01-23-2013 07:57 PM
adding a back plate to my mini-mill, but some problems appeared Anko Machine Modifications 5 09-06-2010 09:34 PM
They're back. Kaleb Computer Geek Zone 5 05-19-2010 10:07 AM
Back plate / chuck. colin General Engine Discussion 1 03-23-2010 12:16 PM



Newest Threads






- Top - Member List