Thank you Stuart.  Will try your ideas.  I don't remember the ferrule
nuts shearing off when I first started in hplc around 1972.  I wound up
in R&D management and did not do much lab work after 1985 or so.

John

On Mon, Dec 12, 2016 at 12:45 AM, Stuart MacMillan wrote:

> Hmm, I once used and then sold that equipment. You can drive an old
> knife blade or jeweler's screwdriver into the hole and twist out the
> broken ferrule.  If it resists, freeze it. If that fails, run really
> hot water over it. This happened all the time because lab folks
> constantly over tightened these connections. No miniature torque
> wrenches. ;-)
>
> Stuart
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
> Behalf Of John Lauterbach
> Sent: Sunday, December 11, 2016 9:21 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: NVC -- Need easy-out or similar tool for 10-32 stainless
> steel bolts
>
> Thank you, Alistair.  We do HO-gauge model trains so we have plenty of
> small drills.
>
> John
>
>
> On Sun, Dec 11, 2016 at 11:30 PM, Alistair Bell wrote:
>
>> Jeeze John, I threw out a bunch of HPLC fittings some years ago.
>> Still have a few plastic odds and ends fittings which I think were
>> from a beckman, but god I can't recall.
>> Do you have a good set of small drills? Can you sneak up with drill
>> size to drill out most of broken part and no damage femal threads?
>>
>> Alistair
>>
>>
>>
>>
>>
>>> On Dec 11, 2016, at 7:50 PM, John Lauterbach
>>> <john@JHL.MGACOXMAIL.COM> wrote:
>>>
>>> I am hoping for the wisdom of the list is locating an easy-out or
>>> similar tool for SS 10-32 bolts.  If any of you have worked with
>>> high performance liquid chromatography (HPLC) equipment
>>> (particularly that made by Waters Associates), you are probably
>>> familiar with so-called ferrule nuts.  These are hex-head 10-32 SS
>>> bolts with a hole down the center to clear 1/16-inch OD SS tubing.
>>> Basically the 1/16-inch tubing is connected to pumps, columns, etc.,
>>> with the ferrule nut followed by a ferrule.  You screw the ferrule
>>> nut -- ferule combination into a specially machine fitting and
>>> tighten it down to make a tight seal.
>>> This passed summer, I bought a collection of 1980s-vintage  HPLC
>>> equipment to teach my Son lab instrument repair and computer
>>> interfacing.  In the process of letting him learn by doing, he
>>> snapped the heads off a couple of the ferrule nuts leaving the end
>>> and the ferrule stuck in the equipment.  Parts involved are NLA so
>>> there is need for a way of extracting the remaining part of the
>>> ferrule nut and ferrule.  I can get the parts to a Dremel drill
>>> press to drill the tubing out of the broken nut, but then need
>>> something to extract the remainder of the ferrule nut.  Are there
>>> miniature easy-outs or similar tools?
>>>
>>> Thank you,
>>>
>>> John