Hello all,
thanks for all your posts. After measuring:
1. the spread is narrow by about 1/32"
2. the hammer and rep centers are at spec (5 3/4" + 3 1/4")
3. the difference in ht between HFC and RFC is 64mm (I think Jon had a typo there)
4. string ht. is 7 20/32" at note 51, the unwound strings being all about that distance +/- 1/32"
5. the hammershanks are off the rail about 8-9mm or about 4/16" to 5/16"
It seems I should
1. shim out the reps appropriately (thanks Vince and Jon)
2. bore new hammers - ?
3. raise the back end of the stack - ?
Any further comments?
I appreciate all the help
Steve
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Stephen Kabat
Lyndhurst OH
216-381-5662
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Original Message:
Sent: 01-23-2015 12:13
From: Stephen Kabat
Subject: shimming Steinway action brackets
This message has been cross posted to the following Discussions: Concert Level Regulation and Preparation and CAUT .
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Hello all,
Here at my school I'm regulating a Steinway B circa 2003. It's impossible to get the jacks to align w/ the knuckles, even approximately, w/o making the hammer blow over 2 inches or having the hammers rest on the rest felt. I'm considering raising the stack- I have about 1/16" or a bit more clearance before the drop screws and hammer flange screws hit the pinblock. Will even this little bit help? Am I missing something? I understand of course that all kinds of futzing will have to be done with other aspects of the regulation: my question is whether shimming the stack is a course of action that should be considered.
Also, why is this happening? Did Steinway not bore the hammers properly? Other arcane mis-alignments?
Any help would be greatly appreciated.
Thanks much.
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Stephen Kabat
Lyndhurst OH
216-381-5662
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