Our Valued Sponsor
OpinionsConsumer ReviewsGuides and How TosCoffeeGeek ReviewsResourcesForums
Coffee: Questions and Answers
Question about flat burr grinders
Great Espresso at Home
Curated selection of the best machines from La Spaziale, Izzo, Quick Mill, La Marzocco & more.
www.clivecoffee.com
 
Not Logged in: Log In to Postlog in
New Topics updated topics   New Posts new posts   Unanswered Posts new unanswered  
Search Discussion Board search   Discussion Board FAQ faq   Signup sign up  
Discussions > Coffee > Q and A > Question about...  
view previous topic | view next topic | view all topics
Author Messages
RaptorHornet
Senior Member
RaptorHornet
Joined: 11 Jun 2011
Posts: 95
Location: Manila, Philippines
Expertise: I love coffee

Espresso: Gaggia Pure
Grinder: Iberital MC2
Vac Pot: Hario Siphon, Brikka
Drip: Kalita 1cup, Aeropress
Posted Fri Oct 12, 2012, 5:32pm
Subject: Question about flat burr grinders
 

How do flat burrs push and dispense beans sideways without the aid of gravity?

 
Do what you love to do and give it your very best
back to top
 View Profile Link to this post
JasonBrandtLewis
Senior Member
JasonBrandtLewis
Joined: 9 Dec 2005
Posts: 6,404
Location: Berkeley, CA
Expertise: I live coffee

Espresso: Elektra T1 - La Valentina -...
Grinder: Mahlkönig K30 Vario -...
Vac Pot: Yama 5-cup
Drip: CCD, Chemex
Roaster: No, no, not another...
Posted Sat Oct 13, 2012, 2:06pm
Subject: Re: Question about flat burr grinders
 

There is the wonderful thing called "centrifugal force."

(Either that, or I didn't understand the question properly.)

 
A morning without coffee is sleep . . .
back to top
 View Profile Link to this post
RaptorHornet
Senior Member
RaptorHornet
Joined: 11 Jun 2011
Posts: 95
Location: Manila, Philippines
Expertise: I love coffee

Espresso: Gaggia Pure
Grinder: Iberital MC2
Vac Pot: Hario Siphon, Brikka
Drip: Kalita 1cup, Aeropress
Posted Sun Oct 14, 2012, 6:19am
Subject: Re: Question about flat burr grinders
 

No, you did (more or less). Thanks. :)

Actually, the thought of centrifugal force already crossed my mind before but only because I figured that particles get thrown away when they get caught up in the teeth of the burrs. I'm wondering more about the central part of the burrs where there's nothing for a bean to latch onto and propel itself towards the teeth.

 
Do what you love to do and give it your very best
back to top
 View Profile Link to this post
GVDub
Senior Member


Joined: 25 Jan 2008
Posts: 864
Location: Los Angeles, CA
Expertise: I live coffee

Espresso: Londinium I, Arrarex...
Grinder: Gaggia MD85, Dienes Mokka,...
Drip: Behmor Brazen, Abid Clever
Roaster: Behmor 1600+
Posted Sun Oct 14, 2012, 6:48am
Subject: Re: Question about flat burr grinders
 

Gravity does play a role, which is why you get popcorning when there is an insufficient column of beans in the grinder throat. Generally, though, the bottom burr is the one that's spinning and the burr mounting plate provides the acceleration towards the grinding surface of the burrs. Think of it as a giant Tilt-A-Whirl carnival ride where, instead of being held against the walls of the wheel by centripetal force so they can drop the floor out from under you, you get fed through a grinder, dropping the floor out in an entirely different way.
back to top
 View Profile Link to this post
view previous topic | view next topic | view all topics
Discussions > Coffee > Q and A > Question about...  
New Topics updated topics   New Posts new posts   Unanswered Posts new unanswered     Search Discussion Board search   Discussion Board FAQ faq   Signup sign up  
Not Logged in: Log In to Postlog in
Discussions Quick Jump:
Symbols: New Posts= New Posts since your last visit      No New Posts= No New Posts since last visit     Go to most recent post= Newest post
Forum Rules:
No profanity, illegal acts or personal attacks will be tolerated in these discussion boards.
No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum.
No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek.
No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum.
Who Can Read The Forum? Anyone can read posts in these discussion boards.
Who Can Post New Topics? Any registered CoffeeGeek member can post new topics.
Who Can Post Replies? Any registered CoffeeGeek member can post replies.
Can Photos be posted? Anyone can post photos in their new topics or replies.
Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts.
Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.
Find the Right Machine...
Package deals on the best machines from Izzo, Quick Mill, Rocket, La Marzocco & more.
www.clivecoffee.com
Home | Opinions | Consumer Reviews | Guides & How Tos | CoffeeGeek Reviews | Resources | Forums | Contact Us
CoffeeGeek.com, CoffeeGeek, and Coffee Geek, along with all associated content & images are copyright ©2000-2014 by Mark Prince, all rights reserved, unless otherwise indicated. Content, code, and images may not be reused without permission. Usage of this website signifies agreement with our Terms and Conditions. (0.215397119522)
Privacy Policy | Copyright Info | Terms and Conditions | CoffeeGeek Advertisers | RSS | Find us on Google+