[CR]Re: Harden Undrilled H/F hubs binding

(Example: Framebuilders:Dario Pegoretti)

From: <velorosso@charter.net>
To: <classicrendezvous@bikelist.org>
Date: Fri, 3 Dec 2004 16:56:52 -0800
Subject: [CR]Re: Harden Undrilled H/F hubs binding

Ted refers to binding of the bearings. Interesting article in (of all places) recent Dirt Rag about bearings and bushings. Discussed bearing loads as radial and thrust. Cup and cone arrangement where bearing surface contact is at 10am and 4pm positions (my interpretation) which handle both forces well. Bearing contact at 12 and 6pm positions (as in many? all? sealed cartridge bearings) handle radial forces well, but not thrust (which is the force pushing outward, perpendicular to radial).

Maybe the Harden design didn't accomodate thrust forces well, possibly explaining the binding in high-force turns. Made me wonder about all around design suitability of sealed bearings for hub bearings.

Not an engineer...hoping some of you can enlighten further.

Date: Fri, 3 Dec 2004 12:03:03 -0800 From: "ternst" <ternst1@cox.net> To: <kohl57@starpower.net>, <classicrendezvous@bikelist.org> Subject: Re: [CR]Harden Undrilled H/F hubs Message-ID: <010601c4d973$19083050$0300a8c0@D8XCLL51> References: <43390-220041253191344292@M2W051.mail2web.com> Content-Type: text/plain;format=flowed;charset="iso-8859-1"; reply-type=original MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 2

These are a great set of period hubs They appear to be drilled for 32fx36r spokes, I suspect the seller is referring to no cutouts in the flanges. I would refer to these as solid high flange or high solid flange and then the rest of description. We sold some of these back in the time frame. They were fine on the road, but for some reason fell out of favor as they were rumored to have"bearing bind" when ridden on steeped bank tracks and hard leaning in road turns. Ted Ernst.

John Siemsen SLO, CA