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Bronze-Brass Bearings
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Dan Helsper



Joined: 28 Dec 2016
Posts: 21

PostPosted: Sun Aug 19, 2018 7:56 am    Post subject: Bronze-Brass Bearings Reply with quote

Are you sure the axle won't fit into those bearings? I just looked at Mcmaster's catalog, and the sell oil-impregnated bronze bearings "For 1-1/2" shaft" and a bunch of other sizes. These will slip-fit onto all the designated sized shafts easily.

Dan Helsper
Loensloe Airfield
Puryear, TN

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Dan Helsper
Loensloe Airfield
Puryear, TN
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braywood



Joined: 29 Sep 2012
Posts: 17
Location: Northern Ireland

PostPosted: Sun Aug 19, 2018 10:22 am    Post subject: Bronze-Brass Bearings Reply with quote

Great practical advice Clif!


M. Bowler
Broughshane,
U.K.
Please help spread the word about the Grasshopper Aeroplane Factory - have a look on Facebook at -
https://www.facebook.com/UlsterglidingBellarena/









From: owner-pietenpol-list-server(at)matronics.com <owner-pietenpol-list-server(at)matronics.com> on behalf of Clif Dawson <cdawson5854(at)shaw.ca>
Sent: 19 August 2018 07:05
To: pietenpol-list(at)matronics.com
Subject: Re: Re: Bronze-Brass Bearings

Check to see if the end of the axle was flared a bit in cutting it off.
Gently file the end, not the cut face but the axle surface. You
should smooth the bearing surface anyway. Cut 220 sandpaper
in strips lengthwise. Sand the surface in the same way shoeshine
boys did in all those old movies. Sand, turn axle, sand, turn axle,
etc., etc., then go to 400 grit. Very little gets removed but maybe
enough to clear the bearing.

Clif
www.clifdawson.ca
Fill what's empty, empty what's full, fart joyously, carry matches.


>
> I got my bushings from McMaster-Carr with 1.5 inch ID. My axle is also 1.5
> inch OD. So there is no clearance and the bushings won't slide onto the
> axle. How do I remedy that situation? Back to the machine shop or can I
> make the bush ID bigger myself?
>
> --------
> Vincent Dunn


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taildrags



Joined: 29 Dec 2009
Posts: 1607
Location: Medford, OR

PostPosted: Sun Aug 19, 2018 12:22 pm    Post subject: Re: Bronze-Brass Bearings Reply with quote

Clif; your hand-sketch (very nice, BTW) raises a question about bench vises. I've seen some that have a set of gripper teeth below the flat vice jaw faces, and those teeth are designed to grip round stock like rod or pipe. My little vise doesn't have those teeth so I usually use the Armstrong technique when clamping round stock in my vise, unless it's thinwall material or has smooth-finished surfaces that must be protected. In those cases, I just have to use whatever is at hand to keep the jaw faces from direct contact with the work, and that usually means working gently or living with some rocking or rolling of the work in the vise. In the case of an axle like this, would you put some thin leather in the vise jaws to grip the axle, or do you have any nifty tricks for holding round stock securely in the jaws?

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Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power, 72x36 Culver prop
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PostPosted: Sun Aug 19, 2018 6:54 pm    Post subject: Bronze-Brass Bearings Reply with quote

Sorry, no nifty tricks but the axle doesn't have to be horizontal.
With the axle verticle and tight against the body of the vice under the jaws
it won't move. I use a couple of things. One is scrap aluminum
angle on the jaws, the other is some sheet aluminum clamped then
bent over the jaws, top and sides. Leather is fine. You could wrap it
around the axle and zapstrap it.
Anyone with those pipe jaws--they will dig into the pipe weakening it.

Clif
Skeptic potential customer asking, " If that penetrating oil is so good,
how's it staying in the can?"

would you put some thin leather in the vise jaws to grip the axle, or do
you have any nifty tricks for holding round stock securely in the jaws?
Quote:

--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC &quot;Scout&quot;
A75 power, 72x36 Culver prop


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taildrags



Joined: 29 Dec 2009
Posts: 1607
Location: Medford, OR

PostPosted: Sun Aug 19, 2018 7:22 pm    Post subject: Re: Bronze-Brass Bearings Reply with quote

Clif; thank you. And I know I'm getting way off-topic here, but seeing the nice wood cabane struts and other details on your airplane, in Canada how does your CAA (or Transport Authority, or whoever it is that deals with experimentals) look upon deviations from the plans? In some other countries, every single little thing has to get approval or it won't fly, literally. How much leeway do you have?

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Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power, 72x36 Culver prop
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PostPosted: Sun Aug 19, 2018 11:41 pm    Post subject: Bronze-Brass Bearings Reply with quote

Lots! There was even a Piet some years ago that got passed
with a declared gross of 1500lb!
You have your DAR, we have MD-RA.
The inspectors are fellow builders. A couple of local ones
have built wood AC and even designed AC. I don't expect
any issues. I've had it on display at our local RAA June
flyin and show. Two of these inspectors have looked at it
and commented favourably.

On a side note. Transport doesn't give a s--t if you fly through
a barn. Just DO NOT, however, carry a passenger while doing so!

Clif
Your body is a temple.
Mine is an adventure theme park.

Quote:

Clif; thank you. And I know I'm getting way off-topic here, but seeing
the nice wood cabane struts and other details on your airplane, in Canada
how does your CAA (or Transport Authority, or whoever it is that deals
with experimentals) look upon deviations from the plans? In some other
countries, every single little thing has to get approval or it won't fly,
literally. How much leeway do you have?

--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC &quot;Scout&quot;
A75 power, 72x36 Culver prop


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ewmoreno1(at)outlook.com
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PostPosted: Mon Aug 20, 2018 8:26 am    Post subject: Bronze-Brass Bearings Reply with quote

Be advised that your local EAA chapter has a reamer that will take care of the size of the I.D. Also there are a few of us that have lathes for the adjustment of the O.D...

Ernie Moreno

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Vincent Dunn



Joined: 15 Dec 2016
Posts: 20
Location: Salem, OR

PostPosted: Tue Aug 21, 2018 6:06 am    Post subject: Re: Bronze-Brass Bearings Reply with quote

Thanks Clif. I used a wire wheel on the axle and a brake caliper hone and electric drill on the bushings. It's working perfectly now. Much appreciated.

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Vincent Dunn
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vincentkdunn(at)yahoo.com
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