60° v block
60° v block
How would one go about making a 60° V-block for measuring the diameter of a 3 flute milling cutter? I'm thinking of something about 1" x 1" x 1" made from cast iron. I think I know how to machine it with a slitting saw, but then how is it ground smooth? Is there any other way except dressing a less than 60° angle on a grinding wheel? I am reluctant to waste that much wheel.
I am also reluctant to spend over $100 for a 60° micrometer.
--earlgo
I am also reluctant to spend over $100 for a 60° micrometer.
--earlgo
Before you do anything, you must do something else first. - Washington's principle.
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- Posts: 109
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Re: 60° v block
Just FYI, in a previous job we/I had a 60 degree 1" mic for a particular 3 flute job. It was a Starrett thimble 0.0001" carbide faced and when worn the cost to resurface the anvils resulted in a new mic. It was a lot more than $100 though.
Currently, this $201 is the cheapest on Amazon;
https://www.amazon.com/Fowler-52-211-14 ... micrometer
Currently, this $201 is the cheapest on Amazon;
https://www.amazon.com/Fowler-52-211-14 ... micrometer
Re: 60° v block
I've considered doing the same and decided the way to go would be to dress a wheel that was wide enough to make a single pass to 30 degrees.
I have a sine chuck on my grinder so I would just set the chuck to 30 degrees and all would be good.
The relief groove at the bottom of the V would give you room to keep the side of the wheel from contacting the vertical side of the V during grinding.
Of course, you them flip the block 180 and finish it.
I have a sine chuck on my grinder so I would just set the chuck to 30 degrees and all would be good.
The relief groove at the bottom of the V would give you room to keep the side of the wheel from contacting the vertical side of the V during grinding.
Of course, you them flip the block 180 and finish it.
Glenn
Operating machines is perfectly safe......until you forget how dangerous it really is!
Operating machines is perfectly safe......until you forget how dangerous it really is!
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Re: 60° v block
Bolt two 60 degree blocks to a base.
Re: 60° v block
Yes, I considered both of those solutions, but was hoping there was some other solution I didn't think of. Oh well.
Thanks for the replies.
--earlgo
Thanks for the replies.
--earlgo
Before you do anything, you must do something else first. - Washington's principle.
- tornitore45
- Posts: 2077
- Joined: Tue Apr 18, 2006 12:24 am
- Location: USA Texas, Austin
Re: 60° v block
Please satisfy my curiosity:
Once you have a 60 degree V block how do you determine the diameter of the 3 flute tool?
Once you have a 60 degree V block how do you determine the diameter of the 3 flute tool?
Mauro Gaetano
in Austin TX
in Austin TX
Re: 60° v block
I was going to use it to check roundness of of shafts, etc.
A 90 degree V block will not detect tri-lobed shafting.
A 90 degree V block will not detect tri-lobed shafting.
Glenn
Operating machines is perfectly safe......until you forget how dangerous it really is!
Operating machines is perfectly safe......until you forget how dangerous it really is!
Re: 60° v block
tornitore45: The attached .pdf is the way I have always done it.
--earlgo
Feel free to correct me if I am in error.--earlgo
Before you do anything, you must do something else first. - Washington's principle.
- tornitore45
- Posts: 2077
- Joined: Tue Apr 18, 2006 12:24 am
- Location: USA Texas, Austin
Re: 60° v block
Thanks, as I suspected the specialty micrometers screws are not 40 TPI but divided by the factor M to give a direct reading.
Mauro Gaetano
in Austin TX
in Austin TX