[Public-List] Damn screws

[Zachary Smith]

Buy a pump, take the advice w/gratitude, or be quiet.

Maybe shave yaks if that's your thing.

Zach

On Monday, June 4, 2018, George Dinwiddie via Public-List <
public-list at lists.alberg30.org> wrote:

> Thanks, everyone, but I've got enough rat-holes without building custom
> tools or trying to drill out a stainless machine screw at an arbitrary
> angle. I don't need more yaks to shave.
>
> I just want to pump out the bilge.
>
> On 6/4/18 1:04 PM, americo silva via Public-List wrote:
>
>> i see hate when that happens
>> maybe an adapter
>>
>> On Mon, Jun 4, 2018 at 12:51 PM, Michael Connolly via Public-List <
>> public-list at lists.alberg30.org> wrote:
>>
>> George,
>>> You can perhaps make an adaptor to fit the bit to the impact driver. This
>>> would be helpful in the future.
>>>
>>> Also, what is more important to you the aluminum casting or the rubber
>>> diaphragm? If the diaphragm is easily and at reasonable cost replaced.
>>> Then
>>> definitely go with heat. I assume that to replace the casting means
>>> replacing the pump. Using heat, heat only the aluminum near the offending
>>> screw. Lots o'heat then let air cool. You can do this several times. I
>>> have
>>> also used a thread loosener along with the heat. Take your bit that fits
>>> and place in screw slot and tap it hard while heating. Repeat several
>>> times
>>> with heat and thread loosener.
>>>
>>> Failing this. What do you think the diameter of the screws is? #10 or
>>> 1/4"? Place aluminum casting on base of drill press and secure level as
>>> possible = perpendicular to the screw. File off the head, center punch
>>> and
>>> starting with new 1/16" bits, drill down thorough the screw. You might
>>> need
>>> a handful of new bits for each screw. Dull drill bits will just go
>>> sideways
>>> esp. in stainless, so use new bits. If you can, drill right through the
>>> screw into the cavity beyond the screw body. Increase the size of the bit
>>> until you reach the size of the original screw = valleys of the threads.
>>> Then use a needle pick and pick out the threads which remain. Sometimes
>>> you
>>> can get all the threads out. Otherwise just get the first couple of
>>> threads. Then start a new tap of the correct size and carefully remove
>>> the
>>> old threads being careful not to cut new threads. The idea to drill right
>>> through the screw into the cavity below is so one can use compressed air
>>> or
>>> thread loosener to blast out the debris a
>>>   s it accumulates. Removal of debris is critical to this operation.
>>> Accumulations of debris will jam the tap and cause the tap to rip out the
>>> original threads in the aluminum casting. Most of the time these screws
>>> go
>>> into a blind hole. Sometimes the hole is deep enough or can be deepened
>>> to
>>> allow you to cut new threads in the lower portion of the hole if the
>>> upper
>>> threads are messed up and your new screw won't tighten up. You will need
>>> to
>>> purchase a bottoming tap or make one by grinding off the end of a tapered
>>> tap. Always begin with the tapered tap and follow with the bottoming tap.
>>> Cleaning out debris as you go.
>>>
>>> Michael................hang in there.
>>>
>>> ----- Original Message -----
>>>
>>> From: "George Dinwiddie via Public-List" <public-list at lists.alberg30.org
>>> >
>>> To: public-list at lists.alberg30.org
>>> Cc: "George Dinwiddie" <gdinwiddie at alberg30.org>
>>> Sent: Monday, June 4, 2018 8:11:29 AM
>>> Subject: Re: [Public-List] Damn screws
>>>
>>> On 6/3/18 9:54 PM, americo silva via Public-List wrote:
>>>
>>>> screw bits are not that expensive must b a hardeware store around
>>>>
>>>
>>> Oh, I've got screw bits that fit the screw, but they don't fit the
>>> impact driver.
>>>
>>> --
>>> ----------------------------------------------------------------------
>>> When I remember bygone days George Dinwiddie
>>> I think how evening follows morn; gdinwiddie at alberg30.org
>>> So many I loved were not yet dead, http://www.Alberg30.org
>>> So many I love were not yet born. also see:
>>> 'The Middle' by Ogden Nash http://idiacomputing.com
>>> ----------------------------------------------------------------------
>>>
>>>
>>>
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> --
>  ----------------------------------------------------------------------
>   When I remember bygone days                         George Dinwiddie
>   I think how evening follows morn;            gdinwiddie at alberg30.org
>   So many I loved were not yet dead,           http://www.Alberg30.org
>   So many I love were not yet born.                          also see:
>                'The Middle' by Ogden Nash     http://idiacomputing.com
>  ----------------------------------------------------------------------
>
>
>
> _______________________________________________
> These businesses support your Association:
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> Please support them.
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>