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Dividing head,what a great tool to have

[3]
[10] Like what you see?
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I love my new vertex bs-0 dividing head. It opened up a whole new world of possibilities for me. I know this has probably been posted a gazillion times,but I feel like sharing.
Today I made myself a dovetail cutter using two
TCMT 16T308 MP NC 3225 inserts with a positive rake and 7degree relief angle.
I did not take enough pics for this post.....was enjoying myself too much.
20180418_162330.jpg
20180418_115342-1.jpg
20180418_115324-1.jpg
What you don't see is, I've set my dividing head 30degr. out of parallel to my mill bed to get the right angle for the insert and tilt the DH 2degrees down to get a positive axial rake. I didn't want to go too big on that angle because of the 7 degr.
relief angle,I do not want the insert to drag.
20180418_161227.jpg
The DH allowed me to machine the two insert landings at the same hight and depth 180 degrees appart.
The cutter angle is 60degr. and the shaft diameter is 20mm (the bigger the better.) The head is about 38mm OD and shaft about 75mm long.
I do not have a job for it yet and are eager to try it out. Maby I wil make a trial cut soon just to see if it works right. Thanks for reading guys.
 

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#3
very nice, have you tried it yet? let us know how it works bill
 
#4
very nice, have you tried it yet? let us know how it works bill
I didn't test it yet,but am eager to. There is not a job for it yet. I have a few things to do over the next few days and then I will make a plan. Will post pics of course.
 
#5
Well Done!

You could also do that with a collet block.
 
#6
That's pretty cool, but I can't visualize how it was held in a rotary table 30-deg out of parallel to the mill. Got any setup pics or drawings or links?
 
#7
That's pretty cool, but I can't visualize how it was held in a rotary table 30-deg out of parallel to the mill. Got any setup pics or drawings or links?
I will post some pics tomorrow what I meant by that.
 
#8
Well Done!

You could also do that with a collet block.
Hi Randy.
I don't have a collet block,but I can see that this can be done that way,I just wonder if you cant get the same precision that you can achieve with a dividing head. What I mean is,would you be able to get the exact depth of insert tip to cutter arbor on both sides with a collet block so that the one tip does'nt do all the cutting? I am asking cause I have never used on before.
 
#9
That's pretty cool, but I can't visualize how it was held in a rotary table 30-deg out of parallel to the mill. Got any setup pics or drawings or links?
Hi there Stioc.
Here are the pics to explain what I meant.

To get this angle in order for the insert to be flat at the bottom of the cutter...
20180419_081708.jpg
20180419_081842.jpg
I had to turn the the dividing head 30degrees out of square, I hope you understand, I don't know if I am using the correct words to explain:acne:,but I think the pictures would. 20180419_080234.jpg
20180419_081349-1.jpg
The square showes 60,but I know you understand that it is 30degr out from 90degr.
20180419_082131.jpg
And this is the 2 degrees downwards to get the 2degr positive axial rake.
20180419_082756.jpg
I trust this explains it,but if you are not sure,please ask.

Have a good day
Michael.
 
#10
Looks good. I have several projects that are waiting patiently for my dividing head to arrive, ( Canada Post claims today is the day ) So many jobs to be done so little time...
 
#11
Thanks for taking the time to post those pics Michael! That's a very clever setup. I have a rotary table but I've never really needed nor used it (since I thought it was just for cutting/drilling precise circles/arcs/holes and gears).
 
#12
Any time, it is pleasure. I think a dividing head and even a rotary table are very versatile tools. Do you have dividing plates with your rotary table? Before I purchased my DH, I thought of getting a rotary table because of the price difference, but after thinking it through, I decided, (with my lovely wife's blessing ),that the DH was the better option,in my opinion, because of the tilting function. Hope I've inspired you a bit to pull your rotary table closer and make some magic :chemist:.
 
#13
Looks good. I have several projects that are waiting patiently for my dividing head to arrive, ( Canada Post claims today is the day ) So many jobs to be done so little time...
You are going to have a lot of fun. I am.:party::teacher:
 
#14
Congrats and good call on the DH, looks like it was a useful addition! Unfortunately, I don't have the dividing plates for my RT. The RT came with the mill along with a spindexer.
 
#15
Congrats and good call on the DH, looks like it was a useful addition! Unfortunately, I don't have the dividing plates for my RT. The RT came with the mill along with a spindexer.
Well I think you can make some if you want to go that route. Good luck
 
#16
Michael
That is a beautiful job you did on the dovetail cutter. I'll be looking for more.
Make some chips.
Nelson Collar
 
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