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 Re: What is the best way to adjust needle spring tension
Author: Chris P 
Date:   2019-06-21 23:42
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More photos of the process. Descriptions as follows:

1. Pillar end of spring slot trimmed to make it parallel right up to the pillar
2. Wood screw head filed flat so it sits low in the anchor plate
3. Spring mounting cut down to half the length
4. Spring mounting cut along its length to open it up to form it into a cradle
5. F#/C# key checked for fit and clearance before fitting new needle spring.

Photos aren't in sequential order - I do the conversion in this order:

- Remove existing needle spring from key
- Remove pillar, drill hole for the new spring and grind recess on the baseplate
- File the wood screw head flat and paper and polish it
- Cut the narrow end of the slot in the joint to make it parallel and refit pillar
- Cut the spring mounting to half its length and remove the piece nearest the pad cup
- Cut along the length of the spring mounting and open it up to form a cradle
- File the underside of the key rod to provide clearance for the needle spring
- Fit the new spring in the pillar, bend it to the required amount and refit key

Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.

Post Edited (2019-06-22 00:04)
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 Topics Author  Date
 What is the best way to adjust needle spring tension  new
m1964 2019-06-21 18:23 
 Re: What is the best way to adjust needle spring tension  new
Ken Lagace 2019-06-21 18:31 
 Re: What is the best way to adjust needle spring tension  new
Paul Aviles 2019-06-21 19:58 
 Re: What is the best way to adjust needle spring tension  new
dorjepismo 2019-06-21 21:30 
 Re: What is the best way to adjust needle spring tension  new
Paul Aviles 2019-06-21 22:10 
 Re: What is the best way to adjust needle spring tension  new
Chris P 2019-06-21 23:38 
 Re: What is the best way to adjust needle spring tension  new
Chris P 2019-06-21 23:42 
 Re: What is the best way to adjust needle spring tension  new
Paul Aviles 2019-06-22 01:03 
 Re: What is the best way to adjust needle spring tension  new
Chris P 2019-06-22 02:25 
 Re: What is the best way to adjust needle spring tension  new
Paul Aviles 2019-06-22 04:15 
 Re: What is the best way to adjust needle spring tension  new
Chris P 2019-06-22 13:32 
 Re: What is the best way to adjust needle spring tension  new
Ed Palanker 2019-06-22 17:19 
 Re: What is the best way to adjust needle spring tension  new
dorjepismo 2019-06-22 20:12 
 Re: What is the best way to adjust needle spring tension  new
Chris P 2019-06-23 01:44 
 Re: What is the best way to adjust needle spring tension  new
clarnibass 2019-06-23 09:12 
 Re: What is the best way to adjust needle spring tension  new
Tony F 2019-06-23 20:06 
 Re: What is the best way to adjust needle spring tension  new
kdk 2019-06-23 21:15 
 Re: What is the best way to adjust needle spring tension  new
Chris P 2019-06-24 10:36 
 Re: What is the best way to adjust needle spring tension  new
Steven Ocone 2019-06-25 03:00 
 Re: What is the best way to adjust needle spring tension  new
clarnibass 2019-06-25 20:35 
 Re: What is the best way to adjust needle spring tension  new
Steven Ocone 2019-06-26 00:51 
 Re: What is the best way to adjust needle spring tension  new
m1964 2019-06-26 05:14 
 Re: What is the best way to adjust needle spring tension  new
clarnibass 2019-06-26 08:01 
 Re: What is the best way to adjust needle spring tension  new
clarnibass 2019-06-26 08:07 
 Re: What is the best way to adjust needle spring tension  new
Chris P 2019-06-26 10:57 
 Re: What is the best way to adjust needle spring tension  new
m1964 2019-06-26 17:54 
 Re: What is the best way to adjust needle spring tension  new
Paul Aviles 2019-06-26 19:43 
 Re: What is the best way to adjust needle spring tension  new
m1964 2019-06-27 05:24 
 Re: What is the best way to adjust needle spring tension  new
Chris P 2019-06-27 11:02 
 Re: What is the best way to adjust needle spring tension  new
Tony F 2019-06-27 13:13 
 Re: What is the best way to adjust needle spring tension  new
m1964 2019-07-02 03:24 


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