MEMBER ITEMS FOR SALE
Custom Knives | Other Knives | General Items
-------------------------------------------
New Posts | New PhotosAll Photos



Go Back   The Knife Network Forums : Knife Making Discussions > Custom Knife Discussion Boards > Knife Making Discussions > High-Performance Blades

High-Performance Blades Sharing ideas for getting the most out of our steel.

Reply
 
Thread Tools Display Modes
  #1  
Old 04-26-2007, 12:29 AM
ShaneMinnear's Avatar
ShaneMinnear ShaneMinnear is offline
Enthusiast
 
Join Date: Jan 2007
Location: Wellington, New Zealand
Posts: 55
Smile Casting an aluminium contact wheel

Hi All

Well, I've been grinding for a while with an 8" contact wheel, but wanted something larger. Contact wheels are hard to find here in New Zealand, and shipping from US was looking horribly expensive. Where to find a wheel...

My father is a College shop teacher with a trade in sheet metal. Anyway, mid last year we both constructed a belt grinder modelled after Rob's beautiful KMG. This year's project was to cast a new 300mm contact wheel.

I video documented the process, and posted on Youtube here --> http://www.youtube.com/watch?v=1AURSxQ6Oms

The last task is to fix a rubber strip onto the face of the contact wheel.

Hope you enjoy watching as much as I enjoyed making - and spending time with my dad!

Shane


__________________
"Naked came I out of my mother's womb, and naked shall I return there; the Lord has given, and the Lord has taken away; blessed be the name of the Lord." Job 1:21
Reply With Quote
  #2  
Old 04-26-2007, 09:37 AM
B.Finnigan's Avatar
B.Finnigan B.Finnigan is offline
Living Legend
 
Join Date: Jun 2005
Location: Near Rainier WA
Posts: 1,986
That is a great project to post and I hope the machining goes well for you. Be sure to keep us updated as to how it finishes. Thanks for sharing it here!
Reply With Quote
  #3  
Old 04-28-2007, 04:33 PM
VictorCoelho's Avatar
VictorCoelho VictorCoelho is offline
Hall of Famer
 
Join Date: Apr 2005
Location: Teresopolis/RJ - BRAZIL
Posts: 2,301
Great job Shane!....tks for sharing with us!
Reply With Quote
  #4  
Old 04-30-2007, 08:49 AM
Dan Graves Dan Graves is offline
Master
 
Join Date: Aug 2002
Location: shreveport, La. 71105
Posts: 991
I will be interested in how you attatch the rubber to the wheel. What are your plans? Will it be serrated or flat faced? Good luck!


__________________
Dan Graves
www.theknifemaker.com
Reply With Quote
  #5  
Old 07-01-2007, 03:00 AM
goneflyin goneflyin is offline
Enthusiast
 
Join Date: Jun 2007
Location: Missouri
Posts: 67
DIY belt grinder

I was wondering if there is any information out there on building a DIY belt grinder. I also have a foundry here at home so I could cast my wheels as well. If anyone knows where I can get information about building a belt grinder please let me know.

Thanks,
Chris
Reply With Quote
  #6  
Old 07-01-2007, 07:16 AM
Robert Mayo's Avatar
Robert Mayo Robert Mayo is offline
Skilled
 
Join Date: Nov 2005
Location: Renfrew Ont. in the heart of the Ottawa Valley
Posts: 676
Quote:
Originally Posted by goneflyin
I was wondering if there is any information out there on building a DIY belt grinder. I also have a foundry here at home so I could cast my wheels as well. If anyone knows where I can get information about building a belt grinder please let me know.

Thanks,
Chris
Welcome to the forum Chris here is a link to a pdf doc. with an indepth plan for a grinder.
Have fun Bob
http://www.dfoggknives.com/PDF/GrinderPlans.pdf
Reply With Quote
  #7  
Old 07-13-2007, 09:16 AM
goneflyin goneflyin is offline
Enthusiast
 
Join Date: Jun 2007
Location: Missouri
Posts: 67
Quote:
Originally Posted by Dan Graves
I will be interested in how you attatch the rubber to the wheel. What are your plans? Will it be serrated or flat faced? Good luck!
I've been wondering about casting my own wheels as well when I get around to building my grinder and I was looking into some of the castable rubber materials. www.smoothon.com has some castable rubber materials but I'm not sure they would be strong enough for a contact wheel.

Chris
Reply With Quote
  #8  
Old 07-13-2007, 09:31 AM
goneflyin goneflyin is offline
Enthusiast
 
Join Date: Jun 2007
Location: Missouri
Posts: 67
I was checking the smoothon.com website for castable materials that could be used for the conatact wheel and they have their items listed with a durometer number as well. Anyone else have any thoughts on this? I have a foundry at home so casting wheels would be a great money saver for me, not to mention allowing me to make custom sized wheels. here's the link http://www.smoothon.com/liqplas.htm

Chris
Reply With Quote
  #9  
Old 07-01-2007, 07:18 AM
Robert Mayo's Avatar
Robert Mayo Robert Mayo is offline
Skilled
 
Join Date: Nov 2005
Location: Renfrew Ont. in the heart of the Ottawa Valley
Posts: 676
Sorry for not commenting on your contact wheel but with dial up it's not an option.
Bob
Reply With Quote
  #10  
Old 07-21-2007, 08:41 PM
ShaneMinnear's Avatar
ShaneMinnear ShaneMinnear is offline
Enthusiast
 
Join Date: Jan 2007
Location: Wellington, New Zealand
Posts: 55
Thought I'd update on the contact wheel...

I had just to attach a rubber stip to the face to provide some give. I used F2 contact adhexive on the basis that if that didn't stick, I would try again with araldite (epoxy). Anyway, in the I fixed on the rubber and allowed it to dry. I placed on a belt (72") and fired up the grinder. It whired up to full speed, then there was an impressive crack and a pile of dust in the air. Not knowing what I had broken (but definately knowing I broken something) I powered it down and checked around. Well, the rubber stip I had glued to the wheel was in three pieces...I think what happened was that one end became unstuck, and was dragged with the sanding belt around the drive wheel. It could have been ugly! I'm just pleased that I don't stand in front of the grinder when I start it up...my power switch is off to one side, and now I realise why this is a good idea!

Anyway, I have to retry sticking with some other adhesive, or admitting defeat and sending the entire wheel off to a company that specialises in resurfacing rubber.


__________________
"Naked came I out of my mother's womb, and naked shall I return there; the Lord has given, and the Lord has taken away; blessed be the name of the Lord." Job 1:21
Reply With Quote
  #11  
Old 07-21-2007, 09:03 PM
goneflyin goneflyin is offline
Enthusiast
 
Join Date: Jun 2007
Location: Missouri
Posts: 67
Quote:
Originally Posted by o'malley
Anyway, I have to retry sticking with some other adhesive, or admitting defeat and sending the entire wheel off to a company that specialises in resurfacing rubber.

I'm really glad to see someone persuing the idea of DIY contact wheels. I've got a foundry at home and have been doing metal casting for several years now, so I'd really like to try this myself. My idea was to take the aluminum wheel after truing up on the lathe and the making a mold that the wheel could set in, then pouring a castable rubber/plastic so it surrounds the wheel with no joints. There are a number of materials from http://smoothon.com/ that might work, then you could put it back on the lathe and true that up as well after it was cured. At least that's one thing I'd like to try.

I just got a copy of Wayne Goddard's book the $50 Knife Workshop and I've gotten really interested in building my own grinders. I made a trip to the scrapyard today and they had a huge bin of old casters , So I bought about a dozen of them to try some experiments with. Wayne used them in his homebuilt grinders that he made so I thought I'd give it a shot as well.

Chris
Reply With Quote
  #12  
Old 07-27-2007, 07:15 AM
Ken Kelley Ken Kelley is offline
Member
 
Join Date: Jul 2007
Location: Frenchburg, KY
Posts: 22
Quote:
Originally Posted by o'malley
Thought I'd update on the contact wheel...


Anyway, I have to retry sticking with some other adhesive, or admitting defeat and sending the entire wheel off to a company that specialises in resurfacing rubber.

Nice job on the casting! Enjoyed the videos too. If you want to try the rubber strip approach again there is a contact adhesive called Pliobond. Supposed to be the best one going with strength of up to 1600 psi. The enemy of all adhesives, though, is heat generated by grinding. Same goes for the castable poyurethane products.

You are right to be concerned about standing in front of your machine when a belt lets go. I experienced my first belt failure a couple of days ago. I was grinding aggressively when a heavy 36 grit belt departed controlled flight and impacted my head and chest. Smarted something fierce but didn't draw blood. I make a habit of wearing a full face shield when I grind. Glad I did.

Ken
Reply With Quote
  #13  
Old 07-26-2007, 04:36 PM
Ken Kelley Ken Kelley is offline
Member
 
Join Date: Jul 2007
Location: Frenchburg, KY
Posts: 22
KMG clone project

Chris,

Here's a post on Blade Forums I submitted after I finished building my KMG clone http://www.bladeforums.com/forums/sh...d.php?t=471167. The post has links to many, many photos on Photobucket which you might find helpful should you chose to build your own. I think I attached one of the missing drawings to this post but I'm not sure. It's for the tension arm.

Ken
Reply With Quote
  #14  
Old 07-26-2007, 04:45 PM
Ken Kelley Ken Kelley is offline
Member
 
Join Date: Jul 2007
Location: Frenchburg, KY
Posts: 22
Nope! Looks like the attachment didn't make it. If you need that drawing just send me an email and I'll get it to you.

K
Reply With Quote
  #15  
Old 07-26-2007, 07:03 PM
goneflyin goneflyin is offline
Enthusiast
 
Join Date: Jun 2007
Location: Missouri
Posts: 67
man that is one nice looking grinder! looks like the one I have plans for. The plans I have didn't have any information on the tension arm, in fact i don't think it even had a drawing for it. Or the tracking roller adjustment. What did you make your rollers out of? Where di d you get the dimensions for them? what size bearings did you use? As you can see I have a ton of questions. I've started modeling the grinder in 3d and was going to create all my 2d drawings from the model. I figured I would make them available to download on my website. I'd like to be able to make them as detailed as possible.

Chris
Reply With Quote
Reply

Tags
blade, diamond, knife


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -5. The time now is 06:29 PM.




KNIFENETWORK.COM
Copyright © 2000
? CKK Industries, Inc. ? All Rights Reserved
Powered by ...

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
The Knife Network : All Rights Reserved