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 Re: How do you define facing length?
Author: Dan Shusta 
Date:   2022-09-30 22:40

I just exchanged a few emails with Ryan Pereira of Pereira3D.com. He advertises his "standard" clarinet mouthpiece as being 1mm@36. I asked him if his 36 was a Brand 36 using a 0.0015" feeler gauge or did his 36 mean the curve cutting started at 18mm. He emailed me a very descriptive reply. I then asked for his written permission to share his comments here on the BB and this was his response:

Hi Dan,

Of course - feel free to share! I completely understand the discrepancies regarding measuring dimensions on mouthpieces. even those who measure tip openings with tip wands can get different readings as different tip wands can give slightly different readings.

Moving back to 3D printing, when I manufacture a mouthpiece blank, the facing length is typically a touch longer than 36 (typically 37 or 38), and once my mouthpiece craftsman does the facing work, the sanding brings it to 36 (all of this is when measured with the 0.0015” feeler gauge). As for CNC, I cannot speak to that since I haven’t worked with the CNC blanks myself. My 3D mouthpieces are the only product I offer where I collaborate with another craftsman, since, as you know, mouthpiece refacing requires a “special touch” to maximize a mouthpiece’s potential. Nikhil certainly has that touch with all the work he’s done for me!

Again, I hope this helps but let me know if I can clarify any info!

All the best,

Ryan Pereira
Pereira 3D Clarinet Services
Founder
www.Pereira3D.com

OK, it appears we actually do have two different facing length measuring systems and they are:

1) If the mpc is 3D printed, a 36 facing is a true Brand 36 facing with the use of a 0.0015" feeler gauge.

2) From my measurements of 2 CNC produced mouthpieces, a 36 and a 35 facing means the beginning cuts of the curves start at 18mm and 17.5mm.

Personally, I really don't like having two different facing length measuring systems, however, this appears to be the case.
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 Topics Author  Date
 How do you define facing length?  new
Dan Shusta 2022-09-30 08:14 
 Re: How do you define facing length?  new
JTJC 2022-09-30 16:30 
 Re: How do you define facing length?  new
kdk 2022-09-30 17:04 
 Re: How do you define facing length?  new
Mojo 2022-09-30 17:51 
 Re: How do you define facing length?  new
kdk 2022-09-30 18:10 
 Re: How do you define facing length?  new
Hunter_100 2022-09-30 18:30 
 Re: How do you define facing length?  new
Hunter_100 2022-09-30 19:08 
 Re: How do you define facing length?  new
kdk 2022-09-30 21:49 
 Re: How do you define facing length?  new
Dan Shusta 2022-09-30 22:40 
 Re: How do you define facing length?  new
Mojo 2022-10-01 16:33 
 Re: How do you define facing length?  new
JTJC 2022-10-01 20:48 
 Re: How do you define facing length?  new
kdk 2022-10-01 21:23 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-02 03:42 
 Re: How do you define facing length?  new
JTJC 2022-10-02 14:48 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-03 02:03 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-03 02:25 
 Re: How do you define facing length?  new
Mojo 2022-10-03 17:33 
 Re: How do you define facing length?  new
JTJC 2022-10-03 20:47 
 Re: How do you define facing length?  new
Paul Aviles 2022-10-03 23:19 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-04 01:08 
 Re: How do you define facing length?  new
JTJC 2022-10-04 17:38 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-04 20:23 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-10 03:27 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-10 03:30 
 Re: How do you define facing length?  new
Paul Aviles 2022-10-10 04:43 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-10 06:13 
 Re: How do you define facing length?  new
Paul Aviles 2022-10-10 07:32 
 Re: How do you define facing length?  new
Mojo 2022-10-10 17:23 


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