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 > Tool Time

Tool Time Let's talk shop. Equipment, Tips & Tricks, Safety issues - Post it here.

Reply
 
Thread Tools Display Modes
  #1  
Old 09-21-2003, 02:52 PM
Bryce Bryce is offline
Registered
 
Join Date: Sep 2003
Posts: 6
Belt grinder Gear ratio's

Well I have been telling myself its time for a new grinder But I am unwilling to fork out the big bucks for a fancy beast. I have a Brand new 1 Hp 3250 rpm motor I got for free I understand that 1750 rpm is ideal but I have what I have What Kind of gear ratio would i need to run a 4" drive wheel like Rob frink sells? At a good belt speed (Btw how fast am I shooting for?)
How thick of plate are you guy's building your grinders out of?

Bryce
Reply With Quote
  #2  
Old 09-22-2003, 05:36 AM
george tichbour george tichbour is offline
Skilled
 
Join Date: Jun 2002
Location: Mississauga, Ontario,Canada
Posts: 478
To get the proper reduction with a 4" drive wheel you should be using an 8" contact wheel.

An alternative is to mount the contact wheel on a lay shaft and drive the contact wheel with a belt...again the motor pully should be exactly 1/2 the diameter of the lay shaft pully but you are now able to use whatever diameter contact wheel you like because the lay shaft will be turning at 1750 all the time.

My homemade grinder is the lay shaft variety with a driven contact wheel on a 1/4" thick steel plate base.

The advantage of the driven contact wheel on a lay shaft is that you can use the machine either as a grinder or as a bufffer. Make sure that the contact wheel overhangs the edge of the plate for clearance.


__________________
george tichbourne
www.tichbourneknives.com
sales@tichbourneknives.com
Reply With Quote
  #3  
Old 09-22-2003, 12:46 PM
Bryce Bryce is offline
Registered
 
Join Date: Sep 2003
Posts: 6
George Thats really what i was thinking of the shaft I should have specifyed that. what I Really was asking is what size of pulleys should i be using on the lay shaft and motor to get the shaft to be turning 1750 with my 3250 motor The way I am building is with a 3 wheel set up one as the drive wheel probley the 4" wheel rob frink sells. and for the tracking wheel the 2 inch one frink sells for tracking. a 10 inch contact wheel A large castor wheel untill I can afford a real one. So tell me if a am wrong I should use a pully twice as big as the one on the motor on the shaft and i will have the corect speed right?
Reply With Quote
  #4  
Old 09-22-2003, 07:42 PM
george tichbour george tichbour is offline
Skilled
 
Join Date: Jun 2002
Location: Mississauga, Ontario,Canada
Posts: 478
The two to one ratio will really give you 1625 RPM but it is close enough because it will take two revolutions of the motor to turn the other pully one rotation.


__________________
george tichbourne
www.tichbourneknives.com
sales@tichbourneknives.com
Reply With Quote
Reply

Tags
blade


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 09:02 AM.




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

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
The Knife Network : All Rights Reserved