Ivor and Olive Lewis on mon 26 may 08
Dear Helen Bates,
This is an interesting comment since these seem to be in competition
against the tools produced by Phil in El Ve
<<(In their 300 series of medium gauge ceramic tools, the Burges claim
the steel used is resistant to abrasion from clay and at the same
time,
"tough enough to be impacted and not break.") (Caveat: I have never
tried their tools... ) >>
There are absolutely thousands of alloy steels stocked around the
World. Those that give wear, corrosion and shock resistance are known
as High Speed Tool Steels. The basic metal is Iron. Metallic alloying
agents can include Tungsten, up to 25 %, Vanadium, Chromium, Manganese
and Molybdenum. Non metallic alloying agents are Carbon and Silicon.
In making these alloys, carbon precipitates during heat treatment as
metallic carbides and a principle variant would be Tungsten Carbide.
When Iron is replaced by Cobalt tools will cut while glowing red hot.
Non of these would fracture if dropped onto a concrete floor will not
fracture.
Best regards,
Ivor Lewis.
Redhill,
South Australia.
Jeff Gieringer on mon 26 may 08
Ivor,
I know Susan personally and used to live a few miles from the Burges
before moving to the Smoky Mountains. The 300 series suits me more for the
way I trim. I also own a few of Phil's tools and like them as well. For me
they are actually two different beasts and I use them for different clays
and trimming purposes. There are tasks that I wouldn't use the Groovy tool
for, period, but the same goes for Bison. They're both great tools. You
just can't drop the Bison's as it is an expensive mistake!
Jeff
----- Original Message -----
From: "Ivor and Olive Lewis"
To:
Sent: Monday, May 26, 2008 12:50 AM
Subject: Turning tool materials
> Dear Helen Bates,
> This is an interesting comment since these seem to be in competition
> against the tools produced by Phil in El Ve
> <<(In their 300 series of medium gauge ceramic tools, the Burges claim
> the steel used is resistant to abrasion from clay and at the same
> time,
> "tough enough to be impacted and not break.") (Caveat: I have never
> tried their tools... ) >>
> There are absolutely thousands of alloy steels stocked around the
> World. Those that give wear, corrosion and shock resistance are known
> as High Speed Tool Steels. The basic metal is Iron. Metallic alloying
> agents can include Tungsten, up to 25 %, Vanadium, Chromium, Manganese
> and Molybdenum. Non metallic alloying agents are Carbon and Silicon.
> In making these alloys, carbon precipitates during heat treatment as
> metallic carbides and a principle variant would be Tungsten Carbide.
> When Iron is replaced by Cobalt tools will cut while glowing red hot.
> Non of these would fracture if dropped onto a concrete floor will not
> fracture.
> Best regards,
> Ivor Lewis.
> Redhill,
> South Australia.
>
Ivor and Olive Lewis on wed 28 may 08
Dear Jeff Gieringer ,
You are in the fortunate position do make a direct comparison. I am
not, but I think other readers will appreciate your candour.
I was just elaborating on metallurgical qualities.
Were I willing to rent gas bottles and expend a couple of hundred
dollars on the
special torch my choice would be to apply an appropriate hardsurfacing
alloy to Mild (non hardening)Steel to produce a self sharpening
working edge.
Best regards,
Ivor Lewis.
Redhill,
South Australia.
Jeff Gieringer on wed 28 may 08
"You are in the fortunate position do make a direct comparison. I am
not, but I think other readers will appreciate your candour."
Ivor,
I knew I was coming in on the tail end of a conversation and coudn't find
the original. I sent you an email offline about one of the tools if you
would like to try it.
Jeff Gieringer
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