RE: [CR]Cup Removal - New Cyclus Tools

(Example: Framebuilders:Alberto Masi)

Content-class: urn:content-classes:message
Subject: RE: [CR]Cup Removal - New Cyclus Tools
Date: Sat, 30 Dec 2006 11:42:14 -0800
In-Reply-To: <E0B2A5FC-9947-44D0-9A6F-69856DD4C64A@ivycycles.com>
Thread-Topic: [CR]Cup Removal - New Cyclus Tools
Thread-Index: AccsPp1ZfqxZ9dWESym7U0XDxDJT7wACsUDg
From: "Mark Bulgier" <Mark@bulgier.net>
To: "Brandon Ives" <brandon@ivycycles.com>
cc: classic rendezvous <classicrendezvous@bikelist.org>

Brandon Ives wrote:
> I've made a fine one [cup press] from an old solid axle and
> a pair of dead cups and some washers. Just remove a little
> material from the dead cup and flip it around and use it to
> press edge to edge.

This is good advice. Most people doing this are pressing in new cups because they just removed some old dead ones, so finding the old dead ones shouldn't be too hard...

Heating the hub up should help, for both extraction and insertion, at least in theory. I don't know how much you'd have to heat it up to really make a difference, but it can't hurt to heat it up a little (as in not enough to burn your hands during the surgery). The aluminum shell, with its higher thermal expansion coefficient, will expand more than the steel race, making the fit looser. I know this works a treat for getting the Al flanges off three-piece hubs with steel center barrels.

Mark Bulgier
Seattle WA USA