[PSUBS-MAILIST] hole saw

Mon Jul 16 11:03:26 EDT 2018

Was this bi metal hole saw a US product?. Sorry just joking for actual political reason.. 
Maybe vibration of the steel destroy the saw? Or to fast rpm? 

With this kind of hole saw you can cut over 2inch deep in steel -  if you can reach the center hole from both sides. 

But you need better two slow turning electric cable hand drills so one can cool down one during using the other. 
And cooling micture (oil/water or just oil)

Hardest job I ever did was cutting 1 inch drop weight steel plates with 
a 120 mm small hand grinder just strait all together 8m long. 
Clear a job for a torch - but I had no one. 

vbr Carsten

-----Original-Nachricht-----
Betreff: Re: [PSUBS-MAILIST] hole saw
Datum: 2018-07-16T11:55:58+0200
Von: "via Personal_Submersibles" <personal_submersibles at psubs.org>
An: "'Personal Submersibles General Discussion'" <personal_submersibles at psubs.org>

Boah..  the right speed and cutting oil I cutted holes in 15 mm P460 . 

Emile

-----Oorspronkelijk bericht-----
Van: Personal_Submersibles <personal_submersibles-bounces at psubs.org> Namens
James Frankland via Personal_Submersibles
Verzonden: maandag 16 juli 2018 11:51
Aan: Personal Submersibles General Discussion
<personal_submersibles at psubs.org>
Onderwerp: Re: [PSUBS-MAILIST] hole saw

Hi Hank,

A couple of weeks ago i cut a 50mm hole through 1.5mm galvanised steel with
bi metal hole saw.  It did it, but only just and ruined the saw.
I don't think it will work on 1/4".

What about using a jig saw with HSS blade?  Slow but would probably work,
and the blades are cheap!

James

On 15 July 2018 at 22:44, hank pronk via Personal_Submersibles
<personal_submersibles at psubs.org> wrote:
> Hi All,
> I need to cut a 8 inch hole through 1\4 inch of 516-70  I am tempted 
> to just try a bi-metal hole saw.  I can't use heat at all so it has to 
> be machined or something like it.  Has anyone tried this?  I can buy 
> the 8 inch hole saw for around 100 dollars.
> Hank
>
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