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Need help restoring brass grinder parts
Rancilio Silvia - How to
Step by step guide for easy brewing and steaming with the Rancilio Silvia
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Burner0000
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Joined: 28 Jul 2011
Posts: 1,082
Location: Cambridge, Ontario Canada
Expertise: Professional

Espresso: Rancilio Silvia, VFA Expres...
Grinder: Macap MX/VFA N1464/Kyocera...
Drip: Manual Drip, French Press
Roaster: Behmor 1600 / Sonofresco
Posted Mon Apr 1, 2013, 6:36pm
Subject: Need help restoring brass grinder parts
 

Does anybody know a good non abrasive way to restore brass grinder parts?

Burner0000: IMG_20130401_213013.jpg
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CoffeeRon
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CoffeeRon
Joined: 26 Apr 2009
Posts: 749
Location: Tacoma Wa.
Expertise: I love coffee

Espresso: Wega Lyra, Europiccola(still...
Grinder: Macap M7D, Pharos, Vario W,...
Vac Pot: Sunbeam CoffeeMaster
Drip: Melita BCM-4
Roaster: FR SR500,B-1600, SC/TO
Posted Mon Apr 1, 2013, 7:57pm
Subject: Re: Need help restoring brass grinder parts
 

A green scotchbrite pad works well for me. Just a note: I heard once that simple green was originally developed for cleaning coffee oils off of things- I believe roasting equipment specifically.
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Burner0000
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Joined: 28 Jul 2011
Posts: 1,082
Location: Cambridge, Ontario Canada
Expertise: Professional

Espresso: Rancilio Silvia, VFA Expres...
Grinder: Macap MX/VFA N1464/Kyocera...
Drip: Manual Drip, French Press
Roaster: Behmor 1600 / Sonofresco
Posted Tue Apr 2, 2013, 5:17am
Subject: Re: Need help restoring brass grinder parts
 

Yeah a scothbrite didn't help much.  I think this may just be aged brass that wasn't taken care of.  I'll try some simple green tonight and if it doesn't work no biggie.  These are internals that aren't visible from the outside of the grinder.  The finish is smooth and clean it just doesn't look as pretty.
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billc
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Joined: 15 Jan 2009
Posts: 130
Location: Seattle, Washington
Expertise: Professional

Espresso: CC1 - GS - GS3 - GB5
Grinder: Baratza - Mazzer-Marzocco
Drip: My own Creation
Posted Tue Apr 2, 2013, 7:59am
Subject: Re: Need help restoring brass grinder parts
 

For grinder parts I often use a wire wheel to clean bronze and brass parts.  It is not the best solution but have found it works quite well in a pinch.  Try ono a small surface first to be sure it will not damage your parts.  YMMV.

BillC
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DavecUK
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Joined: 21 Sep 2005
Posts: 1,416
Location: UK
Expertise: I love coffee

Posted Wed Apr 3, 2013, 6:16am
Subject: Re: Need help restoring brass grinder parts
 

The best way to deal with those parts is to leave them alone and go find something more constructive to do. An annual check of your espresso machine perhaps, or dropping the shower screen and group gasket every 3 days to clean behind it.
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Burner0000
Senior Member


Joined: 28 Jul 2011
Posts: 1,082
Location: Cambridge, Ontario Canada
Expertise: Professional

Espresso: Rancilio Silvia, VFA Expres...
Grinder: Macap MX/VFA N1464/Kyocera...
Drip: Manual Drip, French Press
Roaster: Behmor 1600 / Sonofresco
Posted Thu Apr 4, 2013, 5:40am
Subject: Re: Need help restoring brass grinder parts
 

I do this regularly DavecUK.  I was cleaning 2 commercial grinders that have been sitting in dirty grounds for almost a year.  They needed a cleaning.  I have new burrs on the way. Simple green did a good job cleaning but the dirty looking brass is permanent unless I wanna scratch it up to get it off which isn't constructive.. LOL.
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,775
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Thu Apr 4, 2013, 1:53pm
Subject: Re: Need help restoring brass grinder parts
 

You might try citric acid. The next time you are in a supermarket, buy a lemon (or if you are like me, go out to the front yard and pick one off the tree) and give that a try, it can't hurt, much LOL!

 
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Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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Burner0000
Senior Member


Joined: 28 Jul 2011
Posts: 1,082
Location: Cambridge, Ontario Canada
Expertise: Professional

Espresso: Rancilio Silvia, VFA Expres...
Grinder: Macap MX/VFA N1464/Kyocera...
Drip: Manual Drip, French Press
Roaster: Behmor 1600 / Sonofresco
Posted Mon Apr 8, 2013, 7:44am
Subject: Re: Need help restoring brass grinder parts
 

Thanks I will try that once I have some to pick out of the garden next spring. I should be getting new burrs today and I was mostly worried about stale coffee where it can't be cleaned regularly. These parts are from an old VFA grinder that is next to impossible to find so it will most likely be replaced in the future.
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