[Public-List] Damn screws

Tue Jun 5 09:14:11 PDT 2018

George, 
Would you like to send the pump body to me in New Bern, NC? I can work on getting the screws out for you. Least I can do for all you do for the Association. Let me know. 
Michael 

----- 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 1:08:14 PM 
Subject: Re: [Public-List] Damn screws 

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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> _______________________________________________ 
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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 
---------------------------------------------------------------------- 

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