REFLECTOR: Belleville washers

Scott Derrick scott at tnstaafl.net
Sun Jun 21 16:54:57 CDT 2009


I agree Al. The sticktion is the real problem with the Belleville's.
Enough pressure to eliminate shimmy and the sticktion is so high its
difficult to initiate a turn, thus causing the peddle dance we have all
become accustomed to.. Especially in tight spots like narrow lanes
between hangers and nearly full tight fitting public parking ramps.

I grease up my bellevilles every annual, and I do think it reduces the
sticktion while having little effect on the torque required to turn the
nose wheel.

Keep um greased!

Scott

Al Gietzen wrote:
>
> First of all, I’m aware that there are different configurations of the
> fork, the composition washer, and the Belleville washers; so we need
> to distinguish what were talking about. I’m talking about a
> composition washer above the fork screwed to the flange; with
> Belleville washers below the fork compressed by the nylock nut – as
> found on the SE RG.
>
> My opinion is that a main contributor to steering difficulty with the
> ‘friction’ method of overcoming shimmy is the “sticktion”. I’ll define
> sticktion as the force to begin movement that is over and above the
> force needed to continue movement once movement is started.
>
> My experience is that lubricating the bellvilles where they move
> relative to one another (the smaller diameter contact) reduces
> sticktion; so it is a good idea to grease that contact area.
>
> The friction to inhibit shimmy occurs primarily at the surface between
> the top of the fork and the composition washer. Same goes for greasing
> there.
>
> I’m assuming that Larry is talking about the same configuration that I
> am; and that he has replaced the composition washer with the nylon
> washer to reduce ‘sticktion’. Am I correct, Larry?
>
> Al
>
> *Subject:* Re: REFLECTOR: Belleville washers
>
> Terry, The idea of Belleville washers is to develop turning friction
> to subdue shimmy. You may want to wipe off the grease in order for the
> washers to transfer torque.
>
> John
>
> On Jun 19, 2009, at 2:04 PM, Terry Miles wrote:
>
>
>
> Jeff
>
> Whatever you got. 1/16th or so? This is out of sequence some, but I
> have been removing, polishing off corosion, regreasing (just stock
> marine grease) and adjusting the tq to my bellvues on about a
> quarterly basis. If you have a better mousetrap I'd be interested
> that's all.
>
> Terry
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 260 bytes
Desc: OpenPGP digital signature
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20090621/d47b6658/attachment.pgp>


More information about the Reflector mailing list