topbanner.gif
Login
Username

Password




Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
Shoutbox
You must login to post a message.

snwcmpr
08/18/2019 4:31 AM
Awesome I sent an email to AllenB and JackH The email to JackH failed. I had screenshots of my settings.

allenb
08/18/2019 3:37 AM
Jack and I are enlisting help from our PHP site admin to try and solve as soon as possible. Thanks for letting us know.

snwcmpr
08/18/2019 2:53 AM
I got another PM last night......... No email notice.

snwcmpr
08/17/2019 7:36 AM
Email address correct. I constantly check junk folder. I turned off, then on, the setting to receive notice.

JackH
08/17/2019 7:10 AM
Also check that there are no spam filters set for email.

Users Online
Guests Online: 9

Members Online: 0

Total Members: 6,093
Newest Member: Reganjwright
In Memory Of Ginny
Donations

Latest Donations
allenb - 25.00
snwcmpr - 10.00
Groveland Hill Roas... - 25.00
renatoa - 2.00
JitterzZ - 50.00

View Thread

Who is here? 1 guest(s)
 Print Thread
Source for worm gears?
mrn
Does anyone know a good source of large, coarse worm gears?

Searching the web isn't easy - mostly machine shops and very nicely machines worms show up.

I could perhaps weld one up using split ring lock washers on a shaft, but that might not be the best.

My fall-back is taking a worm gear out of an old hand-crank winch, but I thought I'd ask here if anyone else has found a good source.
Something like this one:

www.sweetmarias.com/roasters_sample/burner_and_gears.JPG


Thanks,
M.
 
EddieDove
Give me some sort of idea of size, if possible. I have some contacts in industrial steel fabrication and they may know ...
Respectfully,

Eddie Dove

The South Coast Coffee Roaster
vita non est vivere sed valere vita est
Home Coffee Roasting Blog and Reference
http://southcoast...gspot.com/
 
http://southcoastcoffeeroaster.blogspot.com
Coffeenut
M,

Don't know what you plan to do, but if you're looking to replicate a sample roaster like the one you showed, an alternative to the worm gear would be to mount the drive motor direct to the drum through that upper case. That would allow you to bypass bypass the worm gear design. I've seen sample roasters done that way without the worm gear.

Rick
 
mrn
eodove wrote:
Give me some sort of idea of size, if possible. I have some contacts in industrial steel fabrication and they may know ...


Eddie - thanks, - I'm thinking of a coarse worm gear that could turn a #40 chain type gear. The worm should be 3/8 - 1/2 inch deep. Perhaps 1/2 inch between "teeth". I figure I can work with almost anything that is deep enough to push the gear. Something like in the picture, would work, but wide and deep are the biggest criteria.


My plan is to make a cylinder drum with a "cone" and 2" opening on each end. The 2" tubing would run on brass bushings. The drum would tip forward to dump. The rear 2" tube would have a drive gear on it. These chain gears are cheap and meant to go on a 2" hub. There are lots of tooth sizes to allow me to customize the drum rotation speed. I would control air (vaccum or blow - haven't decided) out the back tube. I'd sample and TC through the front tube. My whole drum would be non-perforated keeping chaft out of the insides.

I wanted to keep the motor away from the drum and fixed to the base. I also wanted flexibilty on motors, depending what I have or could pick up cheap. The worm gear appears to work well for the commercial units.

M.
 
Jump to Forum:

Similar Threads

Thread Forum Replies Last Post
Hot top gears stripped HotTop Roaster 3 04/24/2019 7:12 AM
Heat Source Behind Drum? Building a Coffee Roaster 6 02/15/2018 6:44 AM
Lets talk Halogen heat source for Drum Roaster Electric and Gas Heat Sources 16 11/12/2017 5:56 PM
Open Source Hot Air Roaster? Fluidbed Roaster 2 01/24/2017 4:27 PM
New Greens Source Green Coffee 49 10/22/2015 12:31 PM
Homeroasters Association Logo, and all Content, Images, and Icons © 2005-2016 Homeroasters Association - Logos are the property of their respective owners.
Powered by PHP-Fusion Copyright © 2019 PHP-Fusion Inc
Released as free software without warranties under GNU Affero GPL v3
Designed with by NetriX