Spring Gear: insert alloy; carrythrough ID

[Dan Morehouse]

Hey Allister!

What type of Al are the inserts made of? And in milling, would I need to
measure my specific ID of the carrythroughs, or just use 1 3/4"?

Thanks,
Dan

.





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[Alister Yeoman]

Hi Dan,

I just used a good quality commercial aluminium that milled well ( not
inexpensive I might add) I am unsure of the grade.

I would certainly measure up the ID of your carrythrough just to check, you
would not want it to be undersized. ( but in saying that, all 4 inserts
should be the same size)

Cheers

Alister



-----Original Message-----
From: Dan Morehouse <danmorehouse@webcombo.net>
To: murphy-rebel@dcsol.com <murphy-rebel@dcsol.com>
Date: Thursday, September 09, 1999 6:16 AM
Subject: Spring Gear: insert alloy; carrythrough ID

Hey Allister!

What type of Al are the inserts made of? And in milling, would I need to
measure my specific ID of the carrythroughs, or just use 1 3/4"?

Thanks,
Dan

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[Dan Morehouse]

Thanks, Bob and Alister.

I'll see if I can find out what the carrythroughs are made from to match up
if
possible.

As far as chromating, I recall a similar proceedure when capping the torque
tube
and putting on the collar there. I put on a couple thin coats and much of it
was
scraped off after I slid them on. In fact they wouldn't fit the first time,
so I
removed the chromate and filed down the inside until it fit a bit looser.
Then I
chromated and inserted.

So here's a scenario that could happen: mill the inserts accurately to
~.005"
larger than the opening. Apply chromate. Now it won't fit, so I file it down
so
it will and in the process lend the accurate milling as wasted $.

I would think that wet or dry, the coating would be scraped off in several
places upon insertion, especiall when this fit sounds like it'll be tighter
than
the torque tube.

Bob Patterson wrote:

Just a thought - if you are using unknown aluminum, it would be a
good idea to coat both pieces with epoxy chromate - dry, before assembly.
This would prevent metal to metal contact, and possible bi-metallic action
that could produce corrosion in an area that's hard to inspect and

expensive

to rebuild !

.....bobp

This is the ONE time when you want both the inside of the tube, and the
insert coated & dry BEFORE assembly - if you do it wet, there could be
some contact.

---------------------------------orig.------------------------------------

---

At 08:21 AM 9/9/99 +1200, you wrote:

Hi Dan,

I just used a good quality commercial aluminium that milled well ( not
inexpensive I might add) I am unsure of the grade.

I would certainly measure up the ID of your carrythrough just to check,

you

would not want it to be undersized. ( but in saying that, all 4 inserts
should be the same size)

Cheers

Alister



-----Original Message-----
From: Dan Morehouse <danmorehouse@webcombo.net>
To: murphy-rebel@dcsol.com <murphy-rebel@dcsol.com>
Date: Thursday, September 09, 1999 6:16 AM
Subject: Spring Gear: insert alloy; carrythrough ID

Hey Allister!

What type of Al are the inserts made of? And in milling, would I need to
measure my specific ID of the carrythroughs, or just use 1 3/4"?

Thanks,
Dan

[Lonnie Benson]

Dan:

I used 6061-T6 for my insert because it was available locally. It was
leftover from a big job so they sold it to me at a very reasonable price.
You might try some of your local machine shops. I reinforced the sides of
the carrythroughs, where the large holes had been drilled, with 1/8 th inch
Al gussets. I also filled the large drilled holes with Al washers I made.

-----Original Message-----
From: Alister Yeoman <yeoman@voyager.co.nz>
To: Murphy Rebel Builders List <murphy-rebel@dcsol.com>
Date: Wednesday, September 08, 1999 4:22 PM
Subject: Re: Spring Gear: insert alloy; carrythrough ID

Hi Dan,

I just used a good quality commercial aluminium that milled well ( not
inexpensive I might add) I am unsure of the grade.

I would certainly measure up the ID of your carrythrough just to check, you
would not want it to be undersized. ( but in saying that, all 4 inserts
should be the same size)

Cheers

Alister



-----Original Message-----
From: Dan Morehouse <danmorehouse@webcombo.net>
To: murphy-rebel@dcsol.com <murphy-rebel@dcsol.com>
Date: Thursday, September 09, 1999 6:16 AM
Subject: Spring Gear: insert alloy; carrythrough ID

Hey Allister!

What type of Al are the inserts made of? And in milling, would I need to
measure my specific ID of the carrythroughs, or just use 1 3/4"?

Thanks,
Dan

*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*

*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*