Fun with Dremels - Replacing the center shaft shear-pin on a CP Pro

[steve]

A shear pin (retaining pin) was sheared on a friends CPP...and oh how
much fun it is to replace!

The center part of the pin was not coming out so...time for the Dremel!

After a "slight" grinding, the shaft came out and now all I have to do
is get the rest of the shearing pin out and re-build everything. It's a
great learning experience...like surgery, but on a smaller scale.

I have found: keep some different types of hemostats handy (curved and
straight) for the really small parts.
Dermels are very handy for small work also. Find some very small
zip-lock bags and always put the parts in them as quickly as you can
after removal. (You'll almost never find them if you drop them) Also a
good "stand mounted" magnifying glass (for us "older" folks) will help.
Get a cold-heat soldering iron and keep the refrigerator full of the
beverage of your choice and always...tell the Wife you'll be done
soon...yeah right. (They know "soon" means probably after midnight
somehow...but don't expect any "Sierra Echo X-ray" after a late night
repair job ;-)
Keep smiling, learning and flying...

[The OTHER Kevin in San Diego]

On 21 Dec 2006 07:17:48 -0800, "steve" <steventv@insightbb.com> wrote:

>
>A shear pin (retaining pin) was sheared on a friends CPP...and oh how
>much fun it is to replace!
>
>The center part of the pin was not coming out so...time for the Dremel!
>
>After a "slight" grinding, the shaft came out and now all I have to do
>is get the rest of the shearing pin out and re-build everything. It's a
>great learning experience...like surgery, but on a smaller scale.
>
>I have found: keep some different types of hemostats handy (curved and
>straight) for the really small parts.
>Dermels are very handy for small work also. Find some very small
>zip-lock bags and always put the parts in them as quickly as you can
>after removal. (You'll almost never find them if you drop them) Also a
>good "stand mounted" magnifying glass (for us "older" folks) will help.
>Get a cold-heat soldering iron and keep the refrigerator full of the
>beverage of your choice and always...tell the Wife you'll be done
>soon...yeah right. (They know "soon" means probably after midnight
>somehow...but don't expect any "Sierra Echo X-ray" after a late night
>repair job ;-)
>Keep smiling, learning and flying...

A good thing to replace that sheep pin with is some brass stock of the
same diameter as the OEM steel pin. The reason for this "fix" is to
minimize damage to the mainshaft when you crash. The steel pin will
bend, but it'll open up the hole in the mainshaft and introduce some
slop into the head. The brass "pin" will more than likely sheer off
in a crash, leaving the mainshaft unharmed.

I've done this to mine and have not replaced a mainshaft in a minor
"oops" in a long time.

[Alibi10 Jerry]

[bekylane]

Where can I purchase such brass pin?

[The OTHER Kevin in San Diego]

On Sun, 15 Jul 2007 16:37:18 -0500, bekylane
<bekylane.2ts7wn@rcgroups.com> wrote:

>
>Where can I purchase such brass pin?

Lots of people are using a piece of paper clip. It's a bit softer
than the OEM pin and instead of messing up the hole in the mainshaft
in a crash, the paper clip sheers off...