building the Gingery dividing head


Thomas Janstrom
 

Interesting, I can see them just fine. Is there a size limit on embedded photos?


Thomas Janstrom
 


finished dividing head

Drilling the spindle, note the chuck failure.

Casting the sector arms and the selector arm.

Trial fit up.


chris eigenheer
 

Nice. Did you drill all those holes by hand? When I built mine I had my neighbor with a small cnc machine drill the plates for me. Saved me a lot of time. Good job on the accomplishment. It’s a much larger project than people realize…

 

Chris

 

New Brunswick, Canada

 

From: gingery-machines@groups.io <gingery-machines@groups.io> On Behalf Of Thomas Janstrom
Sent: December 6, 2022 5:37 AM
To: gingery-machines@groups.io
Subject: Re: [gingery-machines] building the Gingery dividing head

 


finished dividing head

Drilling the spindle, note the chuck failure.

Casting the sector arms and the selector arm.

Trial fit up.


Bruce J
 

Very nice!

On Dec 6, 2022, at 2:36 AM, Thomas Janstrom <thomas@...> wrote:

<EAF9B5E8-FC77-4915-9B42-EB3F60359211.JPG>
finished dividing head
<IMG_9479.jpg>
Drilling the spindle, note the chuck failure.
<sand casting.jpg>
Casting the sector arms and the selector arm.
<trial fit up.jpg>
Trial fit up.

-- 
Bruce Johnson

"Wherever you go, there you are." B. Banzai, PhD


John Dammeyer
 

Nicely done!  I'm guessing mag wheels for raw stock?

John

 

From: gingery-machines@groups.io [mailto:gingery-machines@groups.io] On Behalf Of Thomas Janstrom
Sent: December-06-22 1:37 AM
To: gingery-machines@groups.io
Subject: Re: [gingery-machines] building the Gingery dividing head

 


finished dividing head

Drilling the spindle, note the chuck failure.

Casting the sector arms and the selector arm.

Trial fit up.


Thomas Janstrom
 

The plates (I have the full set plus a spare plate) are Brown and Sharp from a head the local machine shop broke, best $50 I spent, and they just happened to have 1 1/8" bore too... 


John Dammeyer
 

It's all about the process.  Learning to cast and machine.   Adapting.  Awesome.

John

 

From: gingery-machines@groups.io [mailto:gingery-machines@groups.io] On Behalf Of Thomas Janstrom
Sent: December-06-22 2:52 PM
To: gingery-machines@groups.io
Subject: Re: [gingery-machines] building the Gingery dividing head

 

The plates (I have the full set plus a spare plate) are Brown and Sharp from a head the local machine shop broke, best $50 I spent, and they just happened to have 1 1/8" bore too... 


Thomas Janstrom
 

Yep mag wheels for stock, PITA to break up but casts nicely and machines ok (I'd need an oven to heat treat for better machining properties). 


Terry Coombs
 

On 12/6/2022 9:42 PM, Thomas Janstrom wrote:
Yep mag wheels for stock, PITA to break up but casts nicely and machines
ok (I'd need an oven to heat treat for better machining properties).

Drop your castings in cold water straight out of the mold . That will
help with the "gumminess" you often find in fresh castings .
--
Snag
“Free speech is my right to say what you don’t
want to hear.” -George Orwell


S. Ronin McGowan
 

Hey, congrats on getting it pretty much done!



On Tue, Dec 6, 2022, 2:30 AM Thomas Janstrom <thomas@...> wrote:
Wow! Really two plus months gone since my lat update uon this project?

Anyway its now finished, I opted for some secondhand Brown and Sharp plates instead of making my own (or using the cheap chinesium ones I found online). 
The spindle is hollow and bored for a #0 Morse taper for the dead centre and the face plate is mounted via a htread with taper journal to give a positive seat as threaded mounts are not all that accurate.
I plan to at some point mill 4 T-slots in the face plate to go with the 4 tapped holes. The tail stock is one that came with my mill and fits a tiny dividing head (2" 3 jaw chuck). Anyway thats where I'll have to leave things as I'm moving house to get the workshop out of a major flood zone (1.8m or 6' of water through earlier this year).


drilling and boring out the spindle for the dividing head, note vintage chuck failure... 


casting the sector arms 


Trial fit up prior to milling the bevels on the sector arms and sloting the pin arm.


The finished dividing head.

There will be a bit of a video in the new year once I get settled in the new place, but for now thats all I got.

Cheers.