Homemade Toolbit Grinding Jigs and setups.

opensourcefan

opensourcefan

OSF
Carrying on from this topic, those of you who have made jigs and or setups to sharpen tooling, can you share some pics and ideas.

I'm thinking about just building something to work with my 6" grinder or maybe a new dedicated for the purpose. A new grinder with specific wheels is still a 20th of the cost of legit one.

There are a bunch of videos on Utoob that are informative, curious if anyone has had success with anything in particular.
 
opensourcefan

opensourcefan

OSF
I use this as my base and build jigs for it. It's quite handy.

https://www.leevalley.com/en-ca/sho...32975-veritas-basic-grinding-set?item=05D1302

05D1302-basic-grinding-set-f-01.jpg
 
F

fixerup

Super User
This one is homemade but from plans, I bought from eccentric engineering. It works, but does is finicky to set-up for one single grinding job. I adapted a holder to accept an ER collet set I had. I like the table design I made a second one and scribe some angles on the tables has guides. Your Lee Valley base looks equally useful. 20190109_205438_Burst01.jpg
 
opensourcefan

opensourcefan

OSF
fixerup said:
This one is homemade but from plans, I bought from eccentric engineering. It works, but does is finicky to set-up for one single grinding job. I adapted a holder to accept an ER collet set I had. I like the table design I made a second one and scribe some angles on the tables has guides. Your Lee Valley base looks equally useful.
Click to expand...
Wow, now that is cool. Kinda like a drafting table mechanism, I like it.
 
D

Dan Dubeau

Ultra Member
Susquatch said:
That looks really cool!

But it's not immediately obvious to me how you use that. Can you describe it a bit for us?
Click to expand...
Thanks. The sides are stamped according to which included angle you wish to grind. They are compound angles too, so the side angle is built in. I can't remember the exact angle, but guessing it to be around 8-10*. Been a long time since I made it, memory fuzzy on details.

In use if you want a 60* bit you just snug the toolbit in sticking out opposite those faces, and lay the side stamped 60 down on the mag chuck then grind the bit. Then flip the entire jig over to the other side stamped 60, and grind that. And there's your "perfect" 60* thread cutter. If I were to make it again, I would make it larger, and maybe angle the back face for rake angle. The faces aren't big enough to provide adequate holding, so I have to block it in on the chuck for use. It's a lot quicker to rough them in with a cut off wheel too.

I honestly haven't used it in years. I ground up a bunch of bits back when I made it, and for the small amount of threading I do they'll last a lifetime with touch ups. Most of the threading I do now is in the CNC lathe with insert tooling.
 
Susquatch

Susquatch

Ultra Member
Administrator
Moderator
Premium Member
Dan Dubeau said:
Thanks. The sides are stamped according to which included angle you wish to grind. They are compound angles too, so the side angle is built in. I can't remember the exact angle, but guessing it to be around 8-10*. Been a long time since I made it, memory fuzzy on details.

In use if you want a 60* bit you just snug the toolbit in sticking out opposite those faces, and lay the side stamped 60 down on the mag chuck then grind the bit. Then flip the entire jig over to the other side stamped 60, and grind that. And there's your "perfect" 60* thread cutter. If I were to make it again, I would make it larger, and maybe angle the back face for rake angle. The faces aren't big enough to provide adequate holding, so I have to block it in on the chuck for use. It's a lot quicker to rough them in with a cut off wheel too.

I honestly haven't used it in years. I ground up a bunch of bits back when I made it, and for the small amount of threading I do they'll last a lifetime with touch ups. Most of the threading I do now is in the CNC lathe with insert tooling.
Click to expand...

It's the side angle that puzzled me. I can see it now that you describe it. Very cool!
 
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