looking for a tool

[Radio Ron w4ron]

I'm looking for a tool that I don't know if it exist or if it
does what it's called.

I'll try to describe what I'm looking for;

Think about a tapered reamer or a countersink that will
bevel the inside of a hole.
Now think about the opposite, something that'll bevel the outside
of a round shaft.
I have a 1918 receiver that was built for the Navy during WW1.
It has 17 binding posts for connecting other items to the receive.
When it was built they staked the threads on the top of the binding
post to keep the nut from coming off.
A friend here on GJ gave me a set of thread files to use to clean up
the threads which I can do with no problem.
But the person that staked the threads got a little over zealous
and flared the end of the post so it's too big to allow the nut to go
over.
I need to be able to turn the end of the shaft down some, IF I could
get them off I could turn them in the drill press like a vertical lathe.
Kinda like a pencil sharpener that fits over the pencil and as you
turn it it trims off the edge.
BUT they're mounted on the panel so I can't get them off without
removing the binding post.
Is there such a tool that'll let me trim the edges of the top of the post?

below is a photo of the binding post so you can see what I'm talking
about.
they don't look like they're flared much, but it's enough to keep
the nut from turning over it.

Any ideas???

 

[Zeke]

Can you try to lean the thread file over?

 

[BillK]

Ron,
I am almost certain that tool is available. I will look in a couple of catalogs I have at the shop in the morning. What is the diameter of the shafts ? Probably 1/4" "
Bill

 

[Fixnair]

A triangle file is 60* on each edge. It will take some work but eventually you will dress them down. 60* is the angle of the threads on those posts.

 

[BillK]

By the way, I have my old variometer radio almost finished and ready to power up. I will send some pics when it is done

 

[Jarhead0408]

I can picture what you are looking for.

I don't know the name of it, but the guy that built my trailer had to use some kind of tapered reamer like you are describing.

 

[MattVette89]

I think that would be a concave grinding bit.

Something like this might work?

http://m.ebay.com/itm/111581537612?nav=SEARCH

 

[Radio Ron w4ron]

It's maybe 3/16" dia.
The problem with using a file is that the post are too close
together to make it easy to get around them.
IF I could spin them it'd be easy to trim them down with a file.

I'm wondering if Dremal makes a bit that's conical inside, that
would work.

.

 

[RivennHewn]

Hard to read the worn label with my worn out eyes, but I believe this is a Severance 03 1/2 30

http://severancetool.com/index2.html

 

[BillK]

Ron,
Here is another one but I think it is probably too long to work on the controls you have:

http://www.silver-seal.com/product/IC118/Valve-Guide-OD-Chamfer-Tool.html

To be honest with you, the first thing I would try is just running a die down it. Those shafts are usually very soft metal and I bet that the tapered side of a regular threading die will cut its way right onto it without any problem.

Just a thought,
Bill
WB3CII

 

[nutjob]

You do not have much thread sticking above the nut and I'm sure you do not want to mark or damage the surface of the nut.

Might try a split die. The 2 piece type held together with an oring or the round type that uses a set screw to change the size. You should be able to slip the 2 piece onto the shaft backwards, the taper pointing away from the nut and just with finger pressure squeeze the die together while turning back and forth to try to fix the thread.

Kevin

 

[BillK]

I'm wondering if Dremal makes a bit that's conical inside, that
would work.

.

Ron,
You could actually use a "round" bit and go around each stud a little at a time. It really should not take very long at all. I have done it on valve guides plenty of times.

 

[MattVette89]

I'm wondering if Dremal makes a bit that's conical inside, that
would work.

.

That's basically what I posted above, and I believe dremel does make one.

 

[ncfh]

I would think a split die would provide the best final finish and be the most controllable.

 

[paulsomlo]

Might try a split die. The 2 piece type held together with an oring or the round type that uses a set screw to change the size. You should be able to slip the 2 piece onto the shaft backwards, the taper pointing away from the nut and just with finger pressure squeeze the die together while turning back and forth to try to fix the thread.

This gets my vote - about the only way to get flush against the knobs.

Paul
WB2EIU

 

[HammerMechanic]

This
https://www.mscdirect.com/product/details/60271160

 

[Ign]

Or this
http://www.pirate4x4.com/forum/shop-tools/1892634-uniburr-bolt-deburr-tool-2.html

also I think a small Cman Bolt-Out might have the same effect

 

[ouchifellagain]

Wonder if something like this might help out. Just a wild a$$ guess, metal work is not my expertise.

http://www.amazon.com/dp/B0086GU5HI/?tag=atomicindus08-20

 

[Indyducati]

How about an ammunition deburring tool ?

http://www.brownells.com/reloading/.../deburring-tool-inside-outside-prod59413.aspx

 

[bcschief]

How about a metallic cartridge case deburring tool? Like this http://www.ebay.com/itm/FORSTER-CAS...455?pt=LH_DefaultDomain_0&hash=item2c9497291f


Brian
Wow brownells is even cheaper

 

[Outlawmws]

How about an ammunition deburring tool ?

http://www.brownells.com/reloading/.../deburring-tool-inside-outside-prod59413.aspx

How about a metallic cartridge case deburring tool? Like this http://www.ebay.com/itm/FORSTER-CAS...455?pt=LH_DefaultDomain_0&hash=item2c9497291f


Brian
Wow brownells is even cheaper

Great minds... Good thing I read til the last post.

One possible issue with case tools is they are designed for brass, so may not hold up to a lot of work but with the count you mentioned, I'd think it would....