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Old 08-15-2009, 05:40 PM   #1
joe d
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Default Dividing head for Taig lathe/mill

Hi all

Having choked after looking at the prices of factory-made gears, I've decided that I really need to learn to cut my own. So, I need a dividing head suitable for my Taig mill and lathe. Enter Tony Jeffrees... who has designed just the beastie required (see here: http://www.jeffree.co.uk/pages/divheadmk1.html )

I've started with the spindle:


Engineering Change No 1: decided that the spindle nose should be threaded 3/4-16 so all my Taig tooling will fit, this necessitated a filing guide to make the hex...(you all know how this goes... need a tool to make a tool to make a tool.....)


And here we are: spindle finished.


Don't touch that dial, more to come!

Cheers, Joe



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Old 08-15-2009, 05:43 PM   #2
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Default Re: Dividing head for Taig lathe/mill

Looking forward to this Joe, thanks for sharing ............ good start on the spindle

CC



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Old 08-15-2009, 05:44 PM   #3
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Default Re: Dividing head for Taig lathe/mill

VERY NICE Joe
how long did it take to file the hex ?
Regards Rob

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Old 08-15-2009, 05:52 PM   #4
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Default Re: Dividing head for Taig lathe/mill

Thanks CC, Rob: the hex is 1" across the flats, started at 1.20" dia, so it wasn't bad.. half an hour including a smoke and a cuppa. The material is leaded steel, so it cuts (and files) a treat. I will have to keep after it to keep the rust down, well, who said this was low maintenance

Joe

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Old 08-15-2009, 06:08 PM   #5
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Default Re: Dividing head for Taig lathe/mill

Is that 12L14 really that much easier to work with than the 1018 I'm using? I've got tons(It seems ) of the stuff that are cast offs from work. It appears we don't use any leaded steel in anything we are making. We do use lots of 304, 316, 321, 347, and 4140. The 1018 is always rusted completely over its surfaces, but the 4140 appears to take longer than one to two weeks before it is completely covered with rust. This is Houston weather with 95 degree days at 80% humidity and almost daily rainstorms, 98-100% humidity nights are common after rain in the late afternoon.

and I'm blabbing without much point.......(maybe I'm getting rusty at small talk :P )

my question being how much easier is it to work leaded steel than low carbon steel?

Kermit

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Old 08-15-2009, 06:19 PM   #6
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Default Re: Dividing head for Taig lathe/mill

Quote:
my question being how much easier is it to work leaded steel than low carbon steel?
1212 is the standard (100%) for steel machinability. 12L14 comes in at an astounding 170%, making it winner of the machiniability stakes.

http://www.engineersedge.com/materia...l-aluminum.htm
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Old 08-15-2009, 06:37 PM   #7
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Default Re: Dividing head for Taig lathe/mill

I made a crankshaft for the Open Launch engine out of 1018.
Then I tried the same thing for the Horizontal Mill out of 1018.
I failed at that (not because of the metal) and tried again using 12L14.
For me, the difference was astounding.

I don't have much experience but I'm wondering why I would ever use 1018 again.
I have the same question in the Horizontal Mill thread but no answers yet.

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Old 08-15-2009, 08:27 PM   #8
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Default Re: Dividing head for Taig lathe/mill

Quote:
Originally Posted by zeeprogrammer
I don't have much experience but I'm wondering why I would ever use 1018 again.
I have the same question in the Horizontal Mill thread but no answers yet.
Well, I tried to find something online that'd tell you 12L14 wasn't as strong as 1018. I found the opposite. We hardly ever use it at work, and I don't know why.

http://www.onlinemetals.com/alloycat.cfm?alloy=12L14
http://www.onlinemetals.com/alloycat.cfm?alloy=1018

...sorry for dragging the thread off topic.
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Old 08-15-2009, 10:02 PM   #9
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Default Re: Dividing head for Taig lathe/mill

Quote:
Originally Posted by Vernon
Well, I tried to find something online that'd tell you 12L14 wasn't as strong as 1018. I found the opposite. We hardly ever use it at work, and I don't know why.
Maybe lead and weldability has something to do with it

Best Regards
Bob
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Old 08-16-2009, 04:49 AM   #10
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Default Re: Dividing head for Taig lathe/mill

Joe, I made one similar to Tony's, and it works great for gear cutting with the Taig. You'll get you're moneys worth out of it!

So, how did you cut the thread on the spindle?

Dean



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