Pianotech

So, I am getting ready to install a set of hammers. I am already planning to add about 1mm or so to the hammer bore measurement to compensate for future hammer wear, so the hammer will understrike just a little bit after installation. 

But I am also thinking that I should probably add a little bit more to the bore length to compensate for initial hammer prep, which will include mating the hammers to the string, using a piano pounder for a number of hours, and the final voicing of the hammers. So, after doing all the hammer prep and piano pounding, I would still like to end up with the 1mm extra length, as mentioned above, to compensate for future hammer wear.

So, should I add another mm or more of hammer bore length in addition to the 1mm added for future hammer wear? How do you experienced techs handle this issue?

Thanks!

Joe,

Golly, that's al lot of "So"s!

Now to the point, I always added 1.5mm, for several reasons, one being the matter you're concerned with.

David G. Hughes, RPT

Baltimore Chapter

So, I am getting ready to install a set of hammers. I am already planning to add about 1mm or so to the hammer bore measurement to compensate for future hammer wear, so the hammer will understrike just a little bit after installation. 

But I am also thinking that I should probably add a little bit more to the bore length to compensate for initial hammer prep, which will include mating the hammers to the string, using a piano pounder for a number of hours, and the final voicing of the hammers. So, after doing all the hammer prep and piano pounding, I would still like to end up with the 1mm extra length, as mentioned above, to compensate for future hammer wear.

So, should I add another mm or more of hammer bore length in addition to the 1mm added for future hammer wear? How do you experienced techs handle this issue?

Thanks!

Joe,

Golly, that's al lot of "So"s!

Now to the point, I always added 1.5mm, for several reasons, one being the matter you're concerned with.

David G. Hughes, RPT

Baltimore Chapter

So, I am getting ready to install a set of hammers. I am already planning to add about 1mm or so to the hammer bore measurement to compensate for future hammer wear, so the hammer will understrike just a little bit after installation. 

But I am also thinking that I should probably add a little bit more to the bore length to compensate for initial hammer prep, which will include mating the hammers to the string, using a piano pounder for a number of hours, and the final voicing of the hammers. So, after doing all the hammer prep and piano pounding, I would still like to end up with the 1mm extra length, as mentioned above, to compensate for future hammer wear.

So, should I add another mm or more of hammer bore length in addition to the 1mm added for future hammer wear? How do you experienced techs handle this issue?

Thanks!

So, David, I have a question. After you are done with all of your hammer prep, hammer to string mating, piano pounding (if you do that), and voicing, how much extra blow distance are you left with to compensate for future hammer wear? 

Joe,

Golly, that's al lot of "So"s!

Now to the point, I always added 1.5mm, for several reasons, one being the matter you're concerned with.

David G. Hughes, RPT

Baltimore Chapter

So, I am getting ready to install a set of hammers. I am already planning to add about 1mm or so to the hammer bore measurement to compensate for future hammer wear, so the hammer will understrike just a little bit after installation. 

But I am also thinking that I should probably add a little bit more to the bore length to compensate for initial hammer prep, which will include mating the hammers to the string, using a piano pounder for a number of hours, and the final voicing of the hammers. So, after doing all the hammer prep and piano pounding, I would still like to end up with the 1mm extra length, as mentioned above, to compensate for future hammer wear.

So, should I add another mm or more of hammer bore length in addition to the 1mm added for future hammer wear? How do you experienced techs handle this issue?

Thanks!

I am getting ready to install a set of hammers. I am already planning to add about 1mm or so to the hammer bore measurement to compensate for future hammer wear, so the hammer will understrike just a little bit after installation. 

But I am also thinking that I should probably add a little bit more to the bore length to compensate for initial hammer prep, which will include mating the hammers to the string, using a piano pounder for a number of hours, and the final voicing of the hammers. After doing all the hammer prep and piano pounding, I would still like to end up with the 1mm extra length, as mentioned above, to compensate for future hammer wear.

Should I add another mm or more of hammer bore length in addition to the 1mm added for future hammer wear? How do you experienced techs handle this issue?

Thanks!

------------------------------
Joe Burros
Cell: 646-410-7174
jbcello@gmail.com
www.fmi-newengland.com
------------------------------

I don't, I prep the hammers (preneedle, file to square the crown and remove the cupping) before I bore them and then bore them as the center pin/string ht differential dictates.  If you wanted to add 1.5 mm (1/16th") I don't see any harm.  Depending on how much you add, it might change your strike point in the treble a bit but should be easily compensated with the cheek block adjustment.  Bass end is not critical that way.  

I am getting ready to install a set of hammers. I am already planning to add about 1mm or so to the hammer bore measurement to compensate for future hammer wear, so the hammer will understrike just a little bit after installation. 

But I am also thinking that I should probably add a little bit more to the bore length to compensate for initial hammer prep, which will include mating the hammers to the string, using a piano pounder for a number of hours, and the final voicing of the hammers. After doing all the hammer prep and piano pounding, I would still like to end up with the 1mm extra length, as mentioned above, to compensate for future hammer wear.

Should I add another mm or more of hammer bore length in addition to the 1mm added for future hammer wear? How do you experienced techs handle this issue?

Thanks!

------------------------------
Joe Burros
Cell: 646-410-7174
jbcello@gmail.com
www.fmi-newengland.com
------------------------------