Dividing head or rotary table with plates?

Cat, how do you like your casting foundry, what do you cast?
Shooty, nice work on that part. What steel did you use? Heat treat?
 
Larry42 said:
Cat, how do you like your casting foundry, what do you cast?
Shooty, nice work on that part. What steel did you use? Heat treat?
Click to expand...
I think I made that out of a hydraulic cylinder rod without any heat treating. The original part broke in half, so I would say it was too hard.
If you can't make up your mind I would get a RT and use it to it's full potential, and then decide if you need a dividing head.
 
Larry42 said:
Cat, how do you like your casting foundry, what do you cast?

Casting is great fun. I have made gear blanks made of aluminum and brass, Also have made flywheels and faceplates for disc sanders.
Also have made bearing blocks and also pistons. I plan to move my casting operation to my new shop area this spring. One is only
limited by his imagination. This type of operation generates a lot of heat and somewhat hazardous in my garage shop. It's moving to
my new all metal building.:)






IMG 0410

IMG 0410

This is one of my more elaborate builds. The two gear sets on the top of this photo were made from castings.
The gear housings were made with wood patterns using green sand technique. These are the new change gears
for my Springfield lathe that was missing the 1-1 and 2-1 ratios for various feeds and speeds.
Click to expand...
 
Nice work.
Did you turn your rotary table 7.2 degrees, make a cut, turn 7.2 degrees.......????
 
Janderso said:
Nice work.
Did you turn your rotary table 7.2 degrees, make a cut, turn 7.2 degrees.......????
Click to expand...

That is that one would do to make a 50 tooth gear. I used a dividing plate on the RT crank for accuracy.287146
This is a home made dividing head plate I use on my rotary table. The part in my hand is factory
plastic and the one on the plate I made of steel, way better...
 
I was picturing the method I described. When you got to the 48th or 49th cut, hmmmm.
It would be off.
Your method is much better.
 
Janderso said:
I was picturing the method I described. When you got to the 48th or 49th cut, hmmmm.
It would be off.
Your method is much better.
Click to expand...

On a 90 to 1 rotary table, 1 rotation of the crank is 4 degrees. So you make one full rotation plus the amount of holes
needed on the plate to advance 3.2 more degrees.
 
I recently purchased a very nice old used 10" rotary table. I have a 4" Bison chuck that went through the fire but, with a lot of work, it came out very good.
I'll never use it in a lathe other than slow speed.
I thought it would be perfect for the RT.
On my want list, is a universal dividing head with tail stock.
The list is long.
I admire your abilities, that part you made for your mill is great!!
 
Really, I was not sure you could get that accurate with an RT.
 
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