How to smooth ill machining ??

H

hamx-15

Joined
Oct 7, 2008
Messages
9
Hi.....I'm a newbie....
I'm 59,and still haven't figured out what I want'a be when I grow up.

I would like some input,on a question concerning the (walk) if you will on a two blade folder...
Good German blades,crap (on this one anyway) machining of spring.
This 4" pocket folder has a blade on each end..
One blade opens smooth and fine.
The blade on the other end,fills like it's got welding slag stuck in it..
It's tight... Horribly so,and it grinds...
I first sprayed it down good with a lube,and worked it,for a few minutes...
It's better...but is still tight, Tooo tight,and sure isn't smooth....

Here's the question...
Valve lap compound Anyone have any opinions as to it doing any harm.....
Placing a bit (180 grit) in between the,blade arc,at the bottom,and the spring,and work the dickens out of it for a few mins..
The knife,has pretty bone scales,otherwise I've got $10 tied up in it.
My only concerns is getting it rinsed out pretty good,after working the compound,till I figure it's smoothed out as good as it's going to get..

Has anyone ever tired this method..... ???
Unless you know engine machine shop stuff,you may not be familiar with lap compound... It's just a thick paste,a bit thicker than grease,and is black,like a graphite grease.

It has an abrasive substance,that is basically used to polish metal against metal.
Comments..... ??
 
It's worth a try. A soak in an ultrasonic cleaner will do wonders for getting things clean.
 
Thanks for the tip.
In my case and question,I don't think the presented question has to do with (not clean) ....
Unless you were suggesting,using the ultrasonic to clean away the lap compound afterwards.
Maybe that was your point....
This knife was finished using German finished imported blades..
The blades are fine....
I fill the spring is where the tooling screwup is suffering...
It fills like there must have been a mis hit on the spring,right at the point of
contact with the butt on the blade tang...
It got some better,just working it with oil...

Actually,I fill that this is a problem that derives from two separate areas..
One the tang butt,against the spring..
The other,the liners against the blade tang...

The stiffness,hard to move,seems to be at the liner tang contact area.
The rough near gritty walk,seems to be between the tang butt,and the spring..
I need to dunk the whole end of the knife into the lap compound,so it permeates into the tang spring area,and the tang liner area...
Then give it a good ole workin.....
It'll smooth it out,I have no doubts about that..It cuts..
If it gets too hot to hold onto,I'll take a break and let it cool a bit..:jerkit:
 
Don't use any lapping compound! It will imbed itself into the liners and eventually ruin the knife. This problem probably has nothing to do with machining.
Flush the knife with WD 40. It probably already has stuff imbedded. Keep flushing and working the blade.
Bill
 
Yeah,I've thought of that point also.
Hence the thought of having to clean the residual afterwards.
If anything,a good washing in a parts washer,then again this means washing with a solvent (other than water) and possibly harming the bone scales...
If it didn't actually do any harm to the bone material,it could cause that nice pretty red color (that they are now) to turn to a who knows what color.
 
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