You can also lay it flat on a milling machine, pick up the existing hole and
then bore it larger.
John KK9A
To:K8RI <K8RI-on-TowerTalk@tm.net>
Subject:Re: [TowerTalk] Sprockets
From:Charlie Gallo <Charlie@TheGallos.com>
Reply-to:Charlie Gallo <Charlie@TheGallos.com>
Date:Sat, 28 Apr 2012 07:28:40 -0400
On 4/28/2012 K8RI wrote:
> The most difficult part there is getting them aligned to the OD of the
> sprockets runs true, but in general this approach is much cheaper than
> the commercial sprockets with a 2" bore.
Not TOO bad. Probably the easiest way (if an EVEN number of teeth is a set
of
soft jaws with pins in a 3 jaw chuck, or make a mounting spider to follow
the
chain ring pattern, if divisible by 3, you can use a 3 jaw with pins
(assuming
an accurate OR set true type chuck) and of course, there is always working
on a
faceplate. All are skills that are not that hard
--
73 de KG2V - Charles Gallo
Quality Custom Machine-shop work for the radio amateur (sm)
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