Fw: Re: Fw: Re: SB-series friction dial drive

[Sandy and Kees Talen]

OK, relative to the pinch wheel which drives the calibration
dial. It can just wear over time but the usual problem I've seen
here is that someone pulled the front panel off, not knowing
that the pinch wheel is supposed to stay with the dial. As the
aluminum shaft oxidizes over time and increases in size, it
tends to stick in the plastic bezel .....easy mistake to make
(personal experience).

This stresses the rear spring disk, bends it or pops it off. Its
good to have the disks slightly closer together anyway, so with
the rear disk off, cut the shoulder on the shaft down slightly
with a file and with the shaft in a drill (press). Flatten the spring
disk if necessary. Place a nut on the shaft, against the front
shoulder to distribute the force, and insert the shaft loosely
into a vice, small socket, hole in a metal plate, etc. Put the
rear spring disk on and make sure it's flat against the shoulder
on the rear of the shaft. Center punch the shaft to expand
it slightly and hold the rear spring washer.

73s  Kees K5BCQ

--------- Forwarded message ----------
From: Mark Graalman WB8JKR <wb8jkr at JUNO.COM>
To: HEATH at LISTSERV.TEMPE.GOV
Date: Wed, 2 Jan 2002 16:37:54 -0500
Subject: Re: Fw: Re: SB-series friction dial drive
Message-ID: <20020102.163756.-945991.1.WB8JKR at juno.com>

  I think the original article was referring to the slipping
of the wheel that drive the calibration hairline on the
top 0-500 Khz dial.  The one on my SB-110 was starting
to slip and I simply removed the little wheel and filled
in the groove of the wheel with RTV and let it dry.
Its been working non-stop, non-slip for 12 years now.

73,  Mark  WB8JKR


On Wed, 2 Jan 2002 14:05:12 -0600 Sandy and Kees Talen
<windy10605 at JUNO.COM> writes:
> I guess I'm missing something here about rubber bands to repair SB
> series drives. The only two drives I know about are the dual Jackson
> Bros ball verniers as used on the SB-104, HW-101, etc and the pinch
> rollers as used on the SB-301, SB-102, etc

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html