Repairing trem knife edges - Trem on my JS1000 will not retu - Jemsite
Archived Topics and Common Questions Common topics/questions are archived here. You can reply but not start new threads here. New visitors please search the forum for a question possibly already discussed.

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 01-01-2001, 05:56 PM Thread Starter
 
Jason Stone's Avatar
 
Join Date: Dec 2000
Location: New York City
Posts: 401
Repairing trem knife edges - Trem on my JS1000 will not retu

I figured this would be useful for all. *I looked in the old forum for something addressing this directly but couldn't find anything.

The lo pro edge on my JS1000 refuses to return to zero after use. *It either leaves the strings slightly sharp or slightly flat. *The guitar is only 3 or 4 months old, but*I have a feeling the knife edges are not as sharp as they should be. *I seem to remember Rich telling me that some trems left the factory without properly sharpened edges. *The most obvious sign on my JS1000 is that the trem actually pops off the post on the treble side when the bar is depressed as far as it can go. *No, the trem doesn't actually come off the posts completely, but you can hear an audible "pop" once the bar is down far enough. *You can also feel something move if you put your finger on the post when you do this. *I think the edge is actually coming out of the groove in the post. *I've taken the trem off the guitar and compared it to the trem on my JEM7VWH (which doesn't have this problem and returns to zero every time) and I can't really see much difference between the knife edges on each. *However, because of the popping noise just described, I am convinced it is either the knife edges on the trem or the posts themselves that are causing this problem. *BTW, the posts are not loose and are properly locked down with the small screw on the inside.

So the question is: *what is the best way to sharpen the knife edges on the trem? *Is there a particular kind of file I need to buy? *What angle do I need to sharpen at? *How do I know when the edges are sharp enough (other than by reinstalling the trem and testing)? *You get the idea.

Any advice is most appreciated.

Thanks!

Jason
Jason Stone is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 01-01-2001, 06:52 PM
site founder 0% owner
 
jemsite's Avatar
 
Join Date: Nov 2000
Location: NJ - USA
Posts: 11,475
Reviews: 1
Repairing trem knife edges

OK, i think a nice writeup was lost when the forum crashed a while back.

You will need two FINE files.
* One round one. Mine are 7/32" diameter
* One flat (mine is a 3-sided) about 5/16"

Obviously, the round file is for the curved tremolo knife edge, the flat file for the flat knife edge. The files usually are bi-directional, like a saw. You will have to stroke the file in ONE DIRECTION, utilizing the blades to smooth not rip the metal edge. See the crude diagram below:

[font=courier]
--->file direction--->
<<<<<<<<<<<<&l t;<<< (knife edge)
\\\\\\\\\\\\\\\\ (file blade orientation)[/font]

Ensure that you hold the file at the angle that would fix the edge/burr. You're looking at about a 45-degree angle or less but eyeball it to follow the existing knife edge.

I'll have to take some pics but in the meantime common sense should prevail. Use the full length of the file with long, steady strokes. Repeat a few times and reexamine visually to see if more is needed.

Again the goal is to make the knife edge crisp instead of being dull, blunt or burred.

The last step is to replace the tremolo posts. Makes sense to start with new ones if possible. Good luck... glen


(Edited by jemsite at 10:38 am on April 30, 2001)


(Edited by jemsite at 10:39 am on April 30, 2001)
jemsite is offline  
post #3 of 3 (permalink) Old 01-01-2001, 09:24 PM
 
Join Date: Dec 2000
Posts: 43
Repairing trem knife edges

before u start filing away (on the tremolo, that is

replace the tremolo posts first, they are pretty cheap - and tighten the toplock (2 screws in the back of the neck) REAL good, and I really mean you have to tighten it alot!!.

I had the problem myself, changed the tremolo system/tremolo posts (to a edge) - STILL had the problem - then I SUPER tightened the nut - and it now comes back to zero 100%.
mikek is offline  
 

Tags
pro edge , tremolo system

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Jemsite forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address

IMPORTANT: You will be required to activate your account so please ensure that your email address is correct.

If you do not receive your activation check your spam folder before using the CONTACT US form (at the bottom right of each page).



Email Address:
OR

Log-in














Similar Threads
Thread Thread Starter Forum Replies Last Post
WTB Knife edges for Edge trem. JimmyJazz Classified Ads: Guitars and Gear 0 01-31-2012 02:46 AM
Trem Knife Edges, Case Hardening, and Thinning theapprentice Tech: Setup, Repairs and Mods 4 11-29-2010 02:06 AM
Why not 2 curved Edges on a Trem knife? Metallion Ibanez JEM, UV, JS & Other Signature Models 6 01-16-2008 06:29 PM
Rusty trem + knife edges =/ al. Tech: Setup, Repairs and Mods 15 07-12-2005 10:13 PM
Knife edges/trem posts - JS1000 Idiot Tech: Setup, Repairs and Mods 31 05-22-2002 07:05 AM

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome