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Re: [ATM] Fw: Pitch
I am inclined to agree.
The best feature of Acculap is that the hardness does not change and the most troubling feature is that the hardness can not be changed.
You have to change the environment.
I would do two things
1 Get a space heater
2 Use Gugplz 55
Also it is easier to harden Gugolz just heat it
Tom
--
Sent from my smartphone
-----Original Message-----
From: Francis J. O'Reilly <foreilly@verizon.net>
Sent: Friday, February 15, 2008 8:54 PM
To: atm@atmlist.net
Subject: [ATM] Fw: Pitch
----- Original Message -----
From: "Francis J. O'Reilly" <foreilly@verizon.net>
To: "Dave and Connie" <dmatt@frontiernet.net>
Sent: Friday, February 15, 2008 8:54 PM
Subject: Re: [ATM] Pitch
> Try a Kilo of Gugolz 55. You can temper it to soften it with turpentine.
> Better too soft than too hard.
>
> Francis J. O'Reilly
> MAJ NYG TNG
> ----- Original Message -----
> From: "Dave and Connie" <dmatt@frontiernet.net>
> To: <atm@atmlist.net>
> Sent: Friday, February 15, 2008 7:51 PM
> Subject: [ATM] Pitch
>
>
>> Getting to be about time to order pitch and polish.
>>
>> For those keeping score I am doing my first mirror in the wilds of
>> western
>> NY with no local mentor. The blank is a 10" piece of quartz that started
>> at .8" thick. It now has a roughly f6 curve to it and has gone to 500
>> grit
>> SiC. That leaves four little baggies of aluminum oxide and it is time to
>> polish. Figure a couple of weekends.
>>
>> I am working in my drafty cellar so the temperature tonight was 54
>> degrees
>> f. Given that it is February in Rochester it isn't going to get much
>> warmer. I can keep the tool and blank in the living space to maintain
>> 68-70 degrees f and then go into the cold to polish.
>>
>> The tool will be a 10" cement disk about 1.25" thick. I made it off of
>> the
>> blank when I was at 120 grit. It is about 4" off the final ROC so it
>> should be plenty close enough.
>>
>> The question is what should I order for pitch? GotGrit.com has both
>> Acculap and Gugolz.
>>
>> Help -
>> Which brand?
>> Which grade?
>> How much? - the kits ship with 2 lbs of Gugolz so I can take that as a
>> hint. The Aculap is 1/3 kg so I don't know if 2 cans will do the job.
>>
>> Dave
>>
>> _______________________________________________
>> ATM mailing list http://www.atmlist.net/
>
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