[ARC5] Dynamotor Grease

[scottjohnson1 at cox.net]

I take a different approach to the dynamotor bearing issue.  I replace the originals with double sealed bearings and forget about any further issues.  Good bearings are relatively inexpensive these days.
It is amazing how a nice, new ABEC rated bearing will quiet a receiver dynamotor.

Scott W7SVJ
-----Original Message-----
From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf Of Bill Blodgett via ARC5
Sent: Friday, August 22, 2025 11:00
To: hwhall at compuserve.com
Cc: arc5 at mailman.qth.net
Subject: Re: [ARC5] Dynamotor Grease

White lithium grease separates, allowing lower viscosity oil to migrate.
Probably not the best in an application where electrical contacts/motor brushes can become contaminated.

73,
Bill
W5WHB
++++++++++++++++
Bill Blodgett
Arlington, Texas


> On Aug 21, 2025, at 10:29 PM, hwhall--- via ARC5 <arc5 at mailman.qth.net> wrote:
> 
> Is there any known issues with using white lithium grease for dynamotor bearings?
> 
> Wayne
> WB4OGM
> 
> On Thursday, August 21, 2025 at 09:19:20 AM MDT, releazer at earthlink.net <releazer at earthlink.net> wrote:
> 
> I have been using the grease that is used in aircraft magnetos; small tubes of it are available from AircraftSpruce.  I have seen good results but really have not run my dynamotors very much.
> 
> Wayne
> WB5WSV
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