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#Post#: 84105--------------------------------------------------
Re: What do you see in this photo?
By: Chainsawrepair Date: January 10, 2019, 12:43 pm
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Nothing to be sorry about. Old pics are great.
The younger gen has everything on puters phones etc. Where will
those pics be 30-50 years from now.
I love seeing the ones my mom has way back. My hard copy pics go
up to the mid 90's or so before I started saving on puters etc.
Lost a bunch that way.
#Post#: 84118--------------------------------------------------
Re: What do you see in this photo?
By: trappermike Date: January 11, 2019, 6:31 pm
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I just found the original side-view photo,it's not good either.
Bummer.
I still haven't heard anyone guess or explain how I got the
whole crank assembly to be so light,less than a stocker?
#Post#: 84559--------------------------------------------------
Re: What do you see in this photo?
By: trappermike Date: February 27, 2019, 3:10 pm
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The crank counterweights are built of the strongest grade of
titanium,that's why my full circle cranks weighed less than
stock. It is tougher than steel to machine and had a fire on the
lathe once,the cutting bit gets hotter and duller faster cutting
titanium.
The counterbalance holes are also plugged(stuffed),but I used
lighter magnesium instead of aluminum.
I actually found the magnesium harder to obtain than the
titanium,I still have some of them left...
The shafts were made of 4340 stress-relieved steel. (The
strongest steel for that app.)
#Post#: 84570--------------------------------------------------
Re: What do you see in this photo?
By: HolmenTree Date: February 28, 2019, 8:31 am
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Mike you went in deep with that circle crank build, I'm not a
machinist by sorts but your understanding of different alloys is
great thing.
I have a question for you, I'm in the middle of a hotsaw rebuild
with a second one in the near future.
I want to replace the aluminum plates I used in the past with
magnesium plate. Magnesium is a 1/3 lighter then aluminum and
much stronger.
I found a good source that will sell just one piece from .05 mm
thick up to 20mm thick (13/16") as small as 4"×4" up to 10"×20"
and bigger.
Two grades available: AZ31B and AZ91 D magnesium alloy plate.
How easy is this stuff to work with, welding and milling?
#Post#: 84578--------------------------------------------------
Re: What do you see in this photo?
By: trappermike Date: March 1, 2019, 10:32 am
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Of all metals,on the machinability scale magnesium ranks #1,it
is the nicest metal of all to machine,very easy. Welding methods
are similar to aluminum,but you need magnesium rod of course.
#Post#: 84580--------------------------------------------------
Re: What do you see in this photo?
By: HolmenTree Date: March 1, 2019, 12:54 pm
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[quote author=trappermike link=topic=7145.msg84578#msg84578
date=1551457973]
Of all metals,on the machinability scale magnesium ranks #1,it
is the nicest metal of all to machine,very easy. Welding methods
are similar to aluminum,but you need magnesium rod of course.
[/quote]
Thanks Mike, that's what I figured.
They say this magnesium plate coming out of China today is the
best kept secret for the manufacturing industry.
#Post#: 84581--------------------------------------------------
Re: What do you see in this photo?
By: trappermike Date: March 1, 2019, 1:34 pm
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I got my titanium from Vancouver and the magnesium from
California.
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