Klarinet Archive - Posting 000984.txt from 2000/08

From: "Ed Maurey" <edsshop@-----.ca>
Subj: Re: [kl] Reamers
Date: Tue, 29 Aug 2000 16:33:48 -0400

As a professional machinist I'd like to compliment Mark on the quality and
accuracy of his comments. I would add that the bores of the plastic
clarinets appear to be cast [perhaps, even extruded on the top joint] and
the holes machined. I'm not an expert on plastic casting and therefore not
sure of the dimensional accuracy that is possible in these bores. However,
many wooden clarinets are quite inacurately bored so material is no
quarantee of accuracy.

Ed Maurey
----- Original Message -----
From: "Mark Charette" <charette@-----.org>
Subject: Re: [kl] Reamers

> From: "William Wright" <Bilwright@-----.net>
> What type of tool is used on
> a wood clarinet in the first place? Must the tool spin so fast that it
> would melt or soften plastic material? Is it suited (perhaps with
> modifications) to cutting plastic rather than wood? And so forth.
> ------
> I can't answer the clarinet question, but as a former occasional machinist
> (albeit with much lesser qualifications than Anne Bell) I'll tell you that
> the tools and turning speeds of different materials varies widely. Before
> turning or drilling any ferrous or non-ferrous material I would consult a
> guidebook which would give me appropriate speeds with and without
> lubricants, tool cutting angles, tool material, maximum feed speeds for
> desired surface qualities, and more. I've turned, machined and drilled
many
> different materials (including lignum vitae, an incredibly dense wood) and
> chewed up both tools and materials by not following that guide ...
>
> A manufacturing plant trys to maximize production by turning under maximum
> speed and figuring in tool wear - stopping a machine often to change out
the
> tooling & recalibrating the setup is expensive. Dull drill or turning bits
> will smoke and destroy the surface characteristics on wood. On some
plastics
> they'll start chipping and chattering and burning, on other plastics it'll
> cause reflow of the material or other unwanted effects.
>
> Reamers for different woods, metals, and plastics have differently angled
> cutting surfaces so they can cut efficiently and smoothly.
>
>
>
>
>
>
> ---------------------------------------------------------------------
> Unsubscribe from Klarinet, e-mail: klarinet-unsubscribe@-----.org
> Subscribe to the Digest: klarinet-digest-subscribe@-----.org
> Additional commands: klarinet-help@-----.org
> Other problems: klarinet-owner@-----.org
>

---------------------------------------------------------------------
Unsubscribe from Klarinet, e-mail: klarinet-unsubscribe@-----.org
Subscribe to the Digest: klarinet-digest-subscribe@-----.org
Additional commands: klarinet-help@-----.org
Other problems: klarinet-owner@-----.org