Cutter grinder

[BaronJ]

Great design! What is the smallest key way cutter that you have made this way?

The 2 mm one that I'm making at the moment to key the 8 mm diameter holes. I'll post pictures of it when I've got it sorted.

The principle will be the same as the one in the pictures that I posted earlier. I will still use a 10X32 hex grub screw, simply because I have loads of them. But you could use anything you have handy. The only proviso is that it doesn't protrude when the cutter is fully in the slot. With the 8 mm one I should have 6 mm of depth to play with and the grub screws are 6 mm long . I might have to grind a touch off the end.

 

[goldstar31]

BaronJ and I were communicating about the New Tiinker and the one that we both knew from the original designer- Norman Tinker.

Actually, it would not be ffar from the Tinker design to use a vertical slide instead.
It would need a hinge but it is worth a thought.

I also have a scrap top slide which was from a Super7 when the spitot cracked for some reason

There you are

Regards

Norman

 

[HMEL]

https://www.cnccookbook.com/diy-tool-and-cutter-grinder-idea-notebook/
Have been researching this topic myself. Thought I would share this link. Have been looking at making a quorn with castings from Martin Models. But I get mixed information on difficulty of getting small diamond wheels to make it work for carbide and then I think maybe with my skills and available tools required for precision work I would be better off buying a deckel and suffer with the cost rather then the pain of messing such a project up.

Really like the broach tool.

 

[BaronJ]

https://www.cnccookbook.com/diy-tool-and-cutter-grinder-idea-notebook/
Have been researching this topic myself. Thought I would share this link. Have been looking at making a Quorn with castings from Martin Models. But I get mixed information on difficulty of getting small diamond wheels to make it work for carbide and then I think maybe with my skills and available tools required for precision work I would be better off buying a Deckel and suffer with the cost rather then the pain of messing such a project up.

Really like the broach tool.

Thanks for that !

The Quorn is not that difficult to make, but the Tinker tool grinder is quite easy ! They both require some skill to set up and use. You mention the Deckel clone, that comes into the same category as above.

People see these machines and run away with the impression that you just plug in your tool and grind away, then your tool comes out with razor sharp cutting edges !

Sorry if I'm bursting bubbles here, but it just doesn't work like that.

As far as small diamond wheels are concerned, you don't need them unless you are doing specialist work, ordinary small stones are all that is needed, particularly for internal grinding.

 

[goldstar31]

https://www.cnccookbook.com/diy-tool-and-cutter-grinder-idea-notebook/
Have been researching this topic myself. Thought I would share this link. Have been looking at making a quorn with castings from Martin Models. But I get mixed information on difficulty of getting small diamond wheels to make it work for carbide and then I think maybe with my skills and available tools required for precision work I would be better off buying a deckel and suffer with the cost rather then the pain of messing such a project up.

Really like the broach tool.

I got the set of normal wheels from Hemingwaykits in the UK. Not cheap but they are the ones for the Quorn.
I got diamond wheels for the Chine U@?£ Deckel clone with the machine but RDG Tools claim to stock replacements. Again Chros Tools have choices in diamond stuff and CBN too.
Now these are ALL in the UK and I pay UK prices too.
I don't understand Evil Bays or Amazing things or alibaba except in a pantomime. So please don't ask.

If Martin Models still some castings left, I would lash out band buy the Mark3 plans from Hemingwaykits,

Again, the notice in my public house reads-- actually one is a Working Mens Club whilst the other is the local Conservative Club.
'Please do not ask for credit as a refusal may cause offence'

 

[HMEL]

Thanks for that !

The Quorn is not that difficult to make, but the Tinker tool grinder is quite easy ! They both require some skill to set up and use. You mention the Deckel clone, that comes into the same category as above.

People see these machines and run away with the impression that you just plug in your tool and grind away, then your tool comes out with razor sharp cutting edges !

Sorry if I'm bursting bubbles here, but it just doesn't work like that.

As far as small diamond wheels are concerned, you don't need them unless you are doing specialist work, ordinary small stones are all that is needed, particularly for internal grinding.

Thanks:

I am changing tact and putting this tool (cutter grinder) further down on my list. After consideration most of what I do or am able to do is pretty simple. I have an older drill grinder Lisle that I might have fun with in converting to something like a tinker grinder.

Live and Learn is my motto!

 

[BaronJ]

Thanks:

I am changing tact and putting this tool (cutter grinder) further down on my list. After consideration most of what I do or am able to do is pretty simple. I have an older drill grinder Lisle that I might have fun with in converting to something like a tinker grinder.

Live and Learn is my motto!

Most of the problem with TCG's is understanding what is actually required for a tool to cut efficiently ! This is one reason that I advocate people should learn how to grind drills and lathe tools by hand and not rely on carbide insert tooling.

 

[Gordon]

I have been fooling around with trying to make a cutter grinder, mostly using parts and material I have on hand and/or in the odds and ends material. I have what I think is a reasonable machine but I am having a problem with setup. I can get a reasonable result on a non center cutting end mill but when I try to sharpen a center cutting end mill I end up with a center projection. If I move the cutter to over center to get rid of the projection it hits the next tooth and takes the edge off from that tooth.

Prior to starting this time consuming exercise I thought that I had it figured out and I could find all kinds of articles and videos on this but obviously I was not looking at the right information.

What am I missing? Any links to the correct information?

Gordon

 

[BaronJ]

I have been fooling around with trying to make a cutter grinder, mostly using parts and material I have on hand and/or in the odds and ends material. I have what I think is a reasonable machine but I am having a problem with setup. I can get a reasonable result on a non center cutting end mill but when I try to sharpen a center cutting end mill I end up with a center projection. If I move the cutter to over center to get rid of the projection it hits the next tooth and takes the edge off from that tooth.

Prior to starting this time consuming exercise I thought that I had it figured out and I could find all kinds of articles and videos on this but obviously I was not looking at the right information.

What am I missing? Any links to the correct information?

Gordon

Hi Gordon,

I've been making a TCG for nearly two years, I'm only just getting around to the grinding spindle !

As far as center cutting slot drills and end mills are concerned you need to use either a wheel edge or a tapered cone wheel. My preference is a coned wheel. The one I have is a 180 grit diamond wheel 100 mm diameter. Grind the relief first and then the cutting edge. Note the 2 degrees depression towards the center.

 

[goldstar31]

I agree with BaronJ but perhaps could add that some end mills require gashing and some to literally bore out the middle.

Without attracting criticism- probably from armchair wonders- I must add those time immoral words-----
it all depends.

---------------------------------------------------------------------------------------
It's pouring and I am reluctant to go out to the shed again.

Two thoughts about the topic arise and I ppass them on- for what they are worth.

I have a Quorn- amongst other things and if you look at Chaddock's book( I think) it was possible to buy about 5 diffrent wheels for varying tasks. Now- said he timorously-- there are diamond and CBN.
to add. I have-as politely as I can- say-- a lot.

Again, I have a box of ER-32 collets-- and a holder and a finger which holds the appropriate tooth
Again, I have ploughed my way through assorted videos for these Chinese Deckel/Alexander clones.
Some of them are utterly incomprehensible( I might be too) but a few might help.
Then, I'm afraid to say that some are full of repetition and hums and hars.
Like me, they are doing it all for free and must be respected for their efforts.
It will not be easy.

 

[doc1955]

I use a cup wheel set on center tilted for the primary and secondary relief angles. I haven't videoed sharpening the ends something I probably should do. Anyway I have done a couple on sharpening the flutes though.

 

[Gordon]

Here is what I have ended up with so far. As I said it is mostly stuff laying around and other failed projects.

 

[Gordon]

I have pretty much concluded that sharpening the ends of a center cutting end mill is just much more trouble than it is worth. Two of the flutes on a four flute cutter require grinding back from the center. Two tooth and non center cutting may work just fine but that is not what I have in most cases.