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+--- Thread: Tool Grinder (maybe) (/thread-986.html)
RE: Tool Grinder (maybe) - DaveH - 11-15-2012
Greg,
Looking very smart - the graduations look excellent what sort of tool did you use?
Nice bit of machining for the dovetails
DaveH
RE: Tool Grinder (maybe) - f350ca - 11-15-2012
Found an engraving bit in some cutter I was given. Basically a D bit with a point, cut surprisingly well at about 3000 rpm.
RE: Tool Grinder (maybe) - stevec - 11-15-2012
Where's this "split cotter" and where does it go?
RE: Tool Grinder (maybe) - f350ca - 11-15-2012
Its still the imaginary split cotter, two of them, to lock the tool angle and the assembly to a shaft. Maybe today, we'll see.
RE: Tool Grinder (maybe) - stevec - 11-15-2012
Sorry, Does a "split cotter" look like this?
[attachment=3737]
RE: Tool Grinder (maybe) - f350ca - 11-15-2012
Nope Steve, pictures to follow. Interesting screw up today. Machined a pin to old two of the parts together. Machined two diameters and a shoulder then single pointed a 7/8 14 tpi thread on the end. Cleaned it up with a solid die, then parted it off. The thread is crooked to the pin. HOW!!!!!! The die should have followed the existing thread, I do this all the time lacking full profile inserts. As you thread the pin in the top makes a lovely circle about 30 or 40 thou out.
RE: Tool Grinder (maybe) - f350ca - 11-15-2012
The offending pin. Still no idea how the threads got cut crooked. Ended up cutting them undersized with a split die then locating the pin in a counterbore above the female thread. Probably the way it should have been done in the first place. The split cotter Steve.
![[Image: IMG_0340.jpg]](https://lh4.googleusercontent.com/-PBH6auPS2Bs/UKWgsOvyaQI/AAAAAAAAAyQ/4Z5wGiR8XL4/s1280/IMG_0340.jpg)
How it clamps the shaft.
![[Image: IMG_0338.jpg]](https://lh6.googleusercontent.com/-NCMDb6Qy6lU/UKWgrwBxGDI/AAAAAAAAAyY/Komq_EQWoSU/s1280/IMG_0338.jpg)
And the assembly, need to make a handle with thread to tighten the clamp but a bolt works for now.
![[Image: IMG_0337.jpg]](https://lh6.googleusercontent.com/-Hp0QwEqo3oI/UKWgr7kdWBI/AAAAAAAAAyM/S9y3n12ip_g/s1280/IMG_0337.jpg)
RE: Tool Grinder (maybe) - sasquatch - 11-15-2012
Ok, getting the situation now!! (Great pics!!)
RE: Tool Grinder (maybe) - 4R8 - 11-16-2012
ah, it's all starting to make sense to me. Well some of it!
I do like that locking mechanism! very nice,
RE: Tool Grinder (maybe) - Bill Gruby - 11-16-2012
We call that split pin you made a Binder here. I was wondering myself what you were referring to. Crystal clear now. Thanks.