[Milsurplus] Anti-Backlash Gears

[jcoward5452 at aol.com]

Swarf? Is that a word like kerf and sprew?
 Jay



-----Original Message-----
From: Mike Hanz <aaf-radio-1 at aafradio.org>
To: ARC-5 List <arc5 at mailman.qth.net>; milsurplus <milsurplus at mailman.qth.net>
Sent: Wed, Jan 25, 2012 8:21 am
Subject: Re: [Milsurplus] Anti-Backlash Gears


On 1/25/2012 10:36 AM, J. Forster wrote:
 In my experience, anti-backlash gears should not be lubed at all. The
 tooth area is OK with a little light grease, but the area between the
 gears should be chean and dry.

 What does the manual say?
The manual is most likely silent on it, John.  The main reason I like to 
ut a thin coat of light Teflon grease on such mating surfaces is 
recisely because of your other suggestion - putting it on the gear 
eeth alone is a good idea but it doesn't stay there - it eventually 
orks down into the (originally clean) gap between the gears and 
ventually gums up the process because it brings with it dirt and brass 
warf from wear.  A thin film retards that migration because it has to 
ush against an already established barrier.  YMMV, but I've seen the 
ame technique used for larger, higher speed assemblies driven by 
ervos, so it made sense to me.  Probably overkill for the construction 
nd very low rpm application that we use in tuning, but what are we 
bout if not Principle Number 8 - enthusiastic, overly-excessive 
ttention to infinitesimal detail whose effect will probably never be 
oticeable in our own lifetimes? :-)   I'd buy the no lubricant 
hatsoever approach, but those gears are not usually precision cut with 
obs, so mis-match between engaged teeth does generate brass dust over 
ime.  Frankly, a more compelling reason to dismantle and clean is 
rguably to lube the sleeve bearings for the tuning shafts...they bind 
p more rapidly than the split gears, IIRC.
But in the final analysis, doing nothing at all is probably an option, 
oo...until Principle Number 8 raises its ugly head...heh, heh...
73,
ike
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