The Murphy Builders Site

To keep the inspector happy first time around regardig castle nuts and
cotter pins in place of nyloc nuts, is there anything wrong with drilling
the shank out yourself and making the bolt into say an AN4-10?

Thanks
Murray



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Sure you can drill your own holes Murray! Take a fine thread wide check nut
and grind the points on two opposite sides flat for a drilling platform.
Then drill a hole through it, in the drill press a matching distance from
the end of the nut that a castle nut pin slot would be. Use this nut as a
jig for all your bolts by threading it onto the bolt the correct depth,
clamp in your drill press vise horizontally and drill through you "jig"
hole. You should then take a larger drill or counter sink and chamfer the
hole edges if you can. Use a scrap nut to make sure the threads still work
fine on the bolt before using in your assembly.

Other option is to put in an order for the appropriate predrilled
bolts...but I hear yah! Shouldn't have to buy them twice!!

Wayne

----- Original Message -----
From: "Murray and Carol Cherkas" <cherkas@shaw.ca>
To: <murphy-rebel@dcsol.com>
Sent: Monday, July 14, 2003 2:13 AM
Subject: drilling shank

To keep the inspector happy first time around regardig castle nuts and
cotter pins in place of nyloc nuts, is there anything wrong with drilling
the shank out yourself and making the bolt into say an AN4-10?

Thanks
Murray

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I'll second that one.......on the head corner drill jig! If the bit doesn't
break before it gets into the head, it sure will when it comes out the other
side!

----- Original Message -----
From: <klehman@albedo.net>
To: <murphy-rebel@dcsol.com>
Sent: Monday, July 14, 2003 4:31 PM
Subject: Re: drilling shank

Hi

Drilling the cotter pin hole in bolts with the tool or a jig like Wayne
mentioned has worked well for me. I usually use a good bit or a cobalt
bit. Cheap bits seem to dull quickly for me with the high strength
bolts. Since the hole is past the load bearing threads and it is easy to
do, I don't hesitate to drill my own bolts. A threading die cleans up
the burrs nicely for me without damaging the thread roots.

OTOH the jig that Murray mentioned for drilling the corners of bolt
heads is an evil thing with the main purpose of breaking HSS drill bits
in my opinion :(

Ken

Murray and Carol Cherkas wrote:

To keep the inspector happy first time around regardig castle nuts and
cotter pins in place of nyloc nuts, is there anything wrong with

drilling

the shank out yourself and making the bolt into say an AN4-10?

Thanks
Murray

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Hi

Drilling the cotter pin hole in bolts with the tool or a jig like Wayne
mentioned has worked well for me. I usually use a good bit or a cobalt
bit. Cheap bits seem to dull quickly for me with the high strength
bolts. Since the hole is past the load bearing threads and it is easy to
do, I don't hesitate to drill my own bolts. A threading die cleans up
the burrs nicely for me without damaging the thread roots.

OTOH the jig that Murray mentioned for drilling the corners of bolt
heads is an evil thing with the main purpose of breaking HSS drill bits
in my opinion :(

Ken

Murray and Carol Cherkas wrote:

To keep the inspector happy first time around regardig castle nuts and
cotter pins in place of nyloc nuts, is there anything wrong with drilling
the shank out yourself and making the bolt into say an AN4-10?

Thanks
Murray

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