help with identification and sizing

[ziggar]

 Afternoon Gents and Ladies

Yesterday I went to a booty and happened upon these items and thought they would be of some use in the workshop somehow.
They have a normal tapping thread at one end and the other end is simply bent over at 90˚.
Anybody know what they're called and does anyone know how to identify the various sizes ?
If i try to rub the rust off the shaft then any sizing marks underneath are going to be rubbed away too.

Any help greatly appreciated

Thanks

Z

[Jasonb]

Nut tapping machine taps, see my reply on ME and this thread

http://www.model-engineer.co.uk/forums/postings.asp?th=64811

[ziggar]

do you follow everyone around various forums and answer their questions with the same reply ?

why couldnt you leave it alone and let someone else have a go and maybe come up with an answer to the other part of my question or is that not allowed ?

[Jasonb]

Ok measure the pitch of the thread either by using a thread pitch gauge, rule or offering up screws of a known size. Measure the dia as best you can, not always easy on a 3 flute tap. Then sit down with your thread charts and work out what the likely candidates are, same method you would use if trying to find out what thread a screw is.

J

PS why waste peoples time all posting replies to the same question on at least 3 different forums just saving people wasting their time. Better to ask on one forum and wait a while then if no replies ask elsewhere. Oh and a thankyou for aswering the question would not go amiss.

[arnoldb]

Thank you for explaining Jason; I was curious about these devices myself.

Kind regards, Arnold

[ziggar]

Thank You for your second reply
NOT the first

the reason i asked on various forums is because not all people visit all forums and someone else might have had a different answer had you not chipped in pointing all to the one reply, which in itself came across as telling me not to ask questions.....

[steamer]

Hey guys....lets leave this lay alright?   Points made and taken...lets all just move on.

Dave

[90LX_Notch]

Use a Dremel with their small wire wheel to remove the rust without hurting any size markings.  Unless of course, they are printed or etched.

-Bob

[ziggar]

Use a Dremel with their small wire wheel to remove the rust without hurting any size markings.  Unless of course, they are printed or etched.

-Bob

that's the problem there Bob, should have mentioned that
the ones that Ive tried to clean seem to have etched or printed markings and after cleaning I only manage to see the remnants that then make no sense.
I tried using a piece of scotchbrite with some wd40 as a lube rubbing as gentle as I could but still managed to remove the markings. I don't know of a way to remove the rust without removing the markings. Now if someone were to come up with a magical way of removing one without removing the other, that would be great 

[steamer]

You may need to experiment with some of the popular rust removeal compounds.    I'd try CLR for one.   Simple Green will take some surface rust off.

Dave

[ziggar]

being in the UK I'm not familiar with these mystical items that you talk of

anything stronger than Fairy washing up liquid seems to be on some 'forbidden' list somewhere and impossible to obtain
even basic rust eater type solutions are going "organic" and making them basically useless

i have some hammerite rust eater type jelly type stuff here
will have to give that a go tomorrow
but even that's all elf and safeteed up now

[Deko]

Like Jason said they are used on a machine for tapping nuts. I have loads of them from Andrew Johnson over on the ME site,and they are very usefull when tapping lots of through holes in material no thicker than a nut of the same size,as you can go strait through without having to wind them back out.

Cheers Dek.

[mklotz]

being in the UK I'm not familiar with these mystical items that you talk of

Putting your location beneath your avatar will help people to better focus their suggestions in the future.

[swilliams]

Alot of rust removal concoctions are based on phosphoric acid. Apparently molasses is very effective, but I've never tried it.

see - http://en.wikipedia.org/wiki/Phosphoric_acid#Rust_removal

Steve

[steamer]

There is always Cokacola......

Dave

[Bearcar1]

I was also thinking of Coke (the soft drink) as it has been known to remove rust. It has to be replenished on a regular basis though, lest it loses its effervescence too quickly. It does work though.


BC1
Jim