Re: [CR]Bad ideas

Example: Events

From: "Mark Petry" <>
To: <>
References: <>
Subject: Re: [CR]Bad ideas
Date: Mon, 14 May 2001 09:28:23 -0700

You are correct of course but my own take on this is that I would never ever remount a crank with compromised puller threads, this removal technique is for cranks that you just cannot remove any other way and are on a one way trip to the scrap heap.

Opinions may vary but this is mine! And never ride without the retaining bolt goes without saying!

Now to find a way to remove the cylinder heads from my V-12 BMW without pulling the engine. And no, don't tell me to drive around the block a few times with the head bolts loose.

================================================ Mark Petry 206 618 9642 Beautiful Bainbridge Island ================================================ Most of american life is spent driving somewhere and then coming home, wondering why the hell you went.

John Updike, "Rabbit at Rest"


----- Original Message -----
From: "Brandon Ives"
Sent: Monday, May 14, 2001 9:18 AM
Subject: [CR]Bad ideas

> OK something on this list I've seen touted as a good idea really isn't and
> I need to speak up about it. DO NOT EVER ride a crank without the crank
> bolt if you want the crank to be mounted ever again. DO NOT EVER ride a
> crank without a bolt unless trips to the hospital are a fun thing in your
> book. The first point first, a tapered steel spindle and aluminum arm
> relies on a swaged fit to stay tight. To remove this crank without
> "pulling" relies on loosening the swaged part but loosening the fit
> requires that you "round-out" the arm just a bit. Many people on the list
> will say, "I've done this plenty of times" I'm sure you have and you've
> damaged your crank each time. Don't take my word about it talk to your
> local mechanical or materials engineer and ask about swaged fits with
> dissimilar metals. Personally I've seen at least a few dozen cranks
> ruined by people who "knew what they were doing" over the years in the
> shops I've worked in.
> My second point is also based on experience from people who "knew what
> they were doing." Sure I've only seen a few incdents, but what I've seen
> in at least on case means that gentleman can't ride a bike hard again
> since he has so too little achellies tendon and too much scar
> tissue. Also broken collarbones can happen when you "just fall
> off." When the crank comes loose it's just like the arm breaking as far
> as control of the bike is concerened. Sure many people use chairs with
> casters as ladders, but that
> doesn't make it a good idea. The same goes with riding unbolted cranks.
> Sorry if this post is a "bummer" but I really don't want to see anybody
> get hurt or destroy more "classic" parts by doing something
> silly. Remember most accidents happen to people who "know what they're
> doing."
> enjoy,
> Brandon"monkeyman"Ives
> "Nobody can do everything, but if everybody did something everything would
> get done." Gil Scott-Heron