Mailing List flyrotary@lancaironline.net Message #44978
From: kevin lane <n3773@comcast.net>
Subject: reverse engineering
Date: Wed, 28 Jan 2009 21:59:57 -0800
To: flyrotary <flyrotary@lancaironline.net>
I am designing some parts that must fit the drive pulley hub tightly.  my question is, since I've never done this before, involves measuring the existing pulley.  can I assume that measurements are typically even numbers, and that a hole diameter isn't 49.12mm for instance?  I can fit drill bits thru the bolt holes and drive pins to get accurate measurements there.  I discovered that, indeed, the bolt holes aren't at 90 degrees, but appear to be at 85 and 180 degrees, which means the reluctor wheel only fits one way.  I located the holes by measuring the distance between adjacent holes.  again, can I assume an offset of an even 5 degrees?  I am using some electronic calipers from harbor freight.  do you find these accurate enough?      kevin
Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster