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This is polished and fitted as it had been repaired vee the new Rod Screw
As the F# and F keys sit together between a pair of posts, extending one key fixes the gap in the other at the same time
F# Hinge tube was lengthened and tightened as per Repair 7
Finished Lower Stack F# and F
F# Hinge tube was lengthened and tightened as per Repair 7
Finished Lower Stack F# and F
The key is tight on the Rod screw but loose between the posts
Guided by the jig, I step my drill sizes up 1mm at a time, so predrill 2mm/3mm and finally 4mm
Re-aligned as per Repair 9
With the new Rod Screw (112 thou) fitted, I find the top two support posts are still not fully supporting the Upper Stack Rod Screw
With an oversize hole drilled, I insert a pre drilled brass tube through all the holes, in this instance I am using 4mm external
The long tubing allows me to keep my future holes nice and straight as well with minimal drift
The long tubing allows me to keep my future holes nice and straight as well with minimal drift
With just some soft solder I solder the tubing at each post location
P9
Up close of one post sleeved and ready to be resized with our hand made Reamer
The face of the post will be cleaned up when I do my key fitting
The face of the post will be cleaned up when I do my key fitting
Cut away excess tubing between posts with a jewellers saw
Mechanical work lower stack completed
F# has end play
F is loose between posts,
E is loose between posts
D Is loose between posts
With just the fabrication of the new Oversize Rod screw we can re-assess our original issues
New Rod Screw fitted to lower stack asembly and sized to correct length
End play exists between the key and the post
Hinge tube was lengthened and tightened as per Repair 7
Finished Lower Stack E
Lower Stack G#
Lower Stack F
Lower Stack E
Lower Stack D
Post to key relationship is not square, small amount of end play exists between the key and the post
Hinge tube was squared and lengthened as per Repair 7
Finished Lower Stack D
Upper Stack assembly
Post stack out of alignment
The Rod Screw needs to be replaced, so we oversize it and use it as a Reamer first as Per Repair 10 before modifying it into a Rod Screw.
I match the 112 thou rod used in the Lower stack assembly for consistency of parts
I match the 112 thou rod used in the Lower stack assembly for consistency of parts
Upper Stack Post and Key Reaming
Long drill bit
With a larger drill jig, we are going to oversize drill all posts in the upper stack assembly
Type 11 Repair, Bushing a stack post.
Repair is carried out to resize a post guide hole to suit a smaller Rod Screw
Repair is carried out to resize a post guide hole to suit a smaller Rod Screw
Rod Screw rusty and poor condition
Support Posts worn heavily
Body Octave key Loose on Rod Screw, Loose between posts
G Key Upper section loose between posts, loose on Rod Screw
C Key wont sit against post squarley
C Key lower section not touching post, loose on Rod Screw
B Key extremely loose between posts, loose on Rod Screw
B Flat loose on Rod Screw
G Key lower section not touching post, loose on rod
Support Posts worn heavily
Body Octave key Loose on Rod Screw, Loose between posts
G Key Upper section loose between posts, loose on Rod Screw
C Key wont sit against post squarley
C Key lower section not touching post, loose on Rod Screw
B Key extremely loose between posts, loose on Rod Screw
B Flat loose on Rod Screw
G Key lower section not touching post, loose on rod