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 08-31-2004, 10:51 AM
blgoode's Avatar
blgoode blgoode is offline
Skilled
 
Join Date: Nov 2003
Location: NC
Posts: 321
Brass Rod Testing?

Hi Guys,

Exactly how hard are you pushing during a brass rod test? I am pushing till the edge flexes and the brass is scuffed. I dont want to push so hard I run the risk of injury due to a slipping of the blade.. My thought is that if the edge is flexed...its flexed. If its not flexing the edge is still hard or your not pushing hard enough.

Any input is great.


__________________
B.GOODE KNIVES

Reply With Quote
  #2  
Old 09-02-2004, 07:01 PM
Bearpaw's Avatar
Bearpaw Bearpaw is offline
Steel Addict
 
Join Date: Jan 2004
Location: Silver Bay, MN
Posts: 145
brass bending test

If I remember right, in Wayne Goddards video on cable Damascus, he uses about 35 pounds pressure.


__________________
Bearpaw
Reply With Quote
  #3  
Old 09-03-2004, 07:48 AM
Jon Christensen Jon Christensen is offline
Steel Addict
 
Join Date: Jun 2002
Location: Shepherd Mt.
Posts: 229
Edge geometry can also affect this. There may be too much material at the edge which is not allowing it too flex like it should. I usually check this first if I have any problems.
Jon


__________________
www.jonchristensenknives.com

ABS Master Smith

"If you always do what you've always done, you'll always get what you've always gotten" author unknown
Reply With Quote
  #4  
Old 09-05-2004, 11:43 PM
Jason Cutter Jason Cutter is offline
Living Legend
 
Join Date: Sep 2002
Location: Melbourne, Australia
Posts: 1,903
The brass rod flex test is actually a good test of overall functioning. As mentioned, it can be somewhat dependent on the thickness of the blade and edge bevel, but if you're having significant difficulties making it flex, it might be too thick anyway.

You're not trying to flex the area behind the bevel, you're trying to flex the very edge itself. Usually, if an edge is already formed, even a relatively thick edge will manifest a "dimple" when pressed agaqinst the rod.

Remember that the brass rod test will give you the "thumbs up" that a blade is in the correct hardness / toughness range for adequate and proper functionign as a knife. However, that range can be quite wide and you will still need to refine your HT techniques within that acceptable range for the ideal performance characteristics for your knife.

Another version of the test I like to do is to place the rod on a flat clean surface, and ROLL the edge across the rod. With a bright light coming from an angle, I can see the "flex" occuring wherever the rod is in contact with the edge. This gives me the assurance that the entire edge is well tempered and responsive to flexing stresses.

Jason.


__________________
JASON CUTTER BLADEART
Jason Cutter @ Dr Kwong Yeang
Knifemaker, Australia
(Matthew 10.16)
Reply With Quote
  #5  
Old 09-06-2004, 02:29 AM
rlinger's Avatar
rlinger rlinger is offline
Steel Addict
 
Join Date: Jan 2003
Location: WV
Posts: 140
Before much more time goes by you won't have to do that . You willl know how well the HT went from experience. I spend a lot of time banging edges into hardened oak and cutting hundreds of feet of cardboard. As time goes by and you become settled into your HT'ing you will learn to recognise when it went well, even without testing.

RL


__________________
rlinger - http://riflestocks.tripod.com
Reply With Quote
Reply

Tags
blade, 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 02:12 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