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Custom Harmonicas by Andrew Zajac
The most expressive harmonicas

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Comb Tool™

By Andrew | 7:30 PM EDT, Tue September 22, 2015



***Please note I am no longer offering this tool. I have a new tool set which takes its place. Please see The Flatness Tool™ and Reed Plate Claws™***

It's no secret that a comb flattened by hand will outperform one that is machine-made.

Use this tool to make your combs flat.

The secret to warm tone and excellent response is an airtight harp. To be airtight, the comb needs to be perfectly flat.

I meticulously flatten the top edge of this tool which is used as a reference to measure the flatness of every part of the comb surface.

My comb tool™ is a working copy of a high-precision straight-edge (some call this a machinist square) precise to .000025" per 6" (25 millionths of an inch). The original stays in a drawer!

The tool is also used to distribute the weight of your fingers over the surface of the comb as you flatten. Find all the details and instructions for use here:

Also, here are some extra tips on using my comb tool:

Comb tool extra tips page



***Please note I am no longer offering this tool. I have a new tool set which takes its place. Please see The Flatness Tool™ and Reed Plate Claws™***

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Custom diatonic harmonicas, Hohner Affiliated Customizer.
I customize Hohner Marine Band, Rocket, Special 20, and Golden Melody harmonicas.
Andrew Zajac, Kingston Ontario, Canada.
I use a continuous quality improvement process. I use regular evaluation and incremental steps to strive for constant improvement.
Website, text, photos, videos, download documents, designs and products by Andrew Zajac are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
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