Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: "Jim Wilkins" <muratlanne@gmail.com>
Newsgroups: rec.crafts.metalworking
Subject: Re: make - forge? - wedge for feathers-and-wedge rock-split
Date: Sat, 30 Mar 2024 18:44:11 -0400
Organization: A noiseless patient Spider
Lines: 31
Message-ID: <uua4kq$18s6t$1@dont-email.me>
References: <m1v856w8d2.fsf@void.com> <uu6ufb$e31t$1@dont-email.me> <4v1e0jlo0sck52sdc2b2m44mj8m6t6pbgf@4ax.com> <uu923r$10hru$1@dont-email.me> <uu93pj$10v81$1@dont-email.me> <uu999l$128v0$1@dont-email.me> <uu9eef$13jbc$1@dont-email.me> <9fkg0j9s55p1vamdq8rq19lq3gaq6i7j34@4ax.com> <uu9t7t$173fs$1@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain;
	format=flowed;
	charset="iso-8859-1";
	reply-type=response
Content-Transfer-Encoding: 7bit
Injection-Date: Sat, 30 Mar 2024 22:44:42 +0100 (CET)
Injection-Info: dont-email.me; posting-host="f6d734dac2e5035f084901bace4110a5";
	logging-data="1339613"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1/mAkDajP2wDDFdUakOWEWOr3PsR8A7kHg="
Cancel-Lock: sha1:cujBLp8EyoUO/l4nygXQ6MzfWs4=
X-MSMail-Priority: Normal
X-Priority: 3
In-Reply-To: <uu9t7t$173fs$1@dont-email.me>
X-Antivirus-Status: Clean
X-Antivirus: AVG (VPS 240301-2, 3/1/2024), Outbound message
Importance: Normal
X-Newsreader: Microsoft Windows Live Mail 16.4.3505.912
X-MimeOLE: Produced By Microsoft MimeOLE V16.4.3505.912
Bytes: 3195
X-Original-Lines: 1

"Jim Wilkins"  wrote in message news:uu9t7t$173fs$1@dont-email.me...

The feathers for the 5x 1/2" set and the single 3/4" were all made from 3/8"
round rod. The large end is a half circle. I chose 1/2" after finding
several new 1/2" spline drive bits from an auction in a second hand tool
store (that's closing).

I suppose the feathers could be cut freehand endwise on an upright bandsaw
if the stock was tightly clamped in an inverted toolmakers vise to keep it
from twisting when the blade was off center, then beltsanded to smooth
ridges.
---------------------------------------
On closer examination they appear to have been diagonally split lengthwise 
with a horizontal bandsaw, the scratches slightly angled too, leaving the 
large end about 1/4" thick, plus or minus several hairs.

I think a horizontal bandsaw plus a drill press could make this fixture:

Perhaps two short end blocks drilled 11/32" through and 3/8 part way, to 
axially clamp the 3/8" OD blank. The space between them allows inserting and 
removing the part. The bandsaw cuts its own slot. The shutoff tab is 
extended to stop the saw before it slices the fixture base, thus the 
slightly angled kerf marks. The base might be tilted closer to the blade 
angle. Turn the vise to the diagonal angle.

Initial setup centers the blade over the middle of the blank, afterwards 
lower the blade into the slot before tightening the vise.

To simplify machining the moving end clamp block could be on a pivot arm 
instead of a slot, which also moves the toggle clamp away from the blade. An 
eccentric pivot bushing would permit small angular error correction.