tag:blogger.com,1999:blog-365858055267871677.post3275162618319336681..comments2024-03-29T11:39:46.791-04:00Comments on The Feral Irishman: And Back In The Day.. I Thought My Uncle Ralph, The Contractor, Was Busting My Ass....Irishhttp://www.blogger.com/profile/09772405362867585844noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-365858055267871677.post-45377790773099399562017-02-04T17:21:31.236-05:002017-02-04T17:21:31.236-05:00I spent 40 years dealing with this measurement sta...I spent 40 years dealing with this measurement standard. We routinely hand shaved babbitt bearings<br />using Prussian Blue to measure contact area between journal and bearing. As a Millwright, I used<br />a massive 3/4" air drill suspended on an a-frame via slings and chain-fall to drive a 32" cylinder<br />hone. The horizontal cylinder sleeve was at least 30" in length. It was all done by feel; Push,<br />pull, push, pull etc., occasionally increasing tension.<br /><br />I routinely achieved .0005" precision correcting for out of round, egg shape, barrel shape (), and<br />hourglass )(.<br /> <br />This one has graduations of .03125 1/32".<br /><br />There is a pocket scale version this graduated in 1/64", or .015" or 1 (red cunt hair.) So sayeth<br />the Society Of Mechanical Engineers!<br /><br /><br />Leonard Jonesnoreply@blogger.comtag:blogger.com,1999:blog-365858055267871677.post-7624667173169364202017-02-03T13:10:51.956-05:002017-02-03T13:10:51.956-05:00A VERY long time ago an aircraft mechanic told me ...A VERY long time ago an aircraft mechanic told me I needed to shave 1RCH off a piece I was working on. When I gave him a quizzical look, he explained that a Red Cunt Hair was the finest unit of measure ever created. So, that begs the question, is that ruler marked in regular CH units or RCHs?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-365858055267871677.post-1267540454842307552017-02-03T13:09:00.090-05:002017-02-03T13:09:00.090-05:00A long time VERY ago an aircraft mechanic told me ...A long time VERY ago an aircraft mechanic told me I needed to shave 1RCH off a piece I was working on. When I gave him a quizzical look, he explained that a Red Cunt Hair was the finest unit of measure ever created. So, that begs the question, is that ruler marked in regular CH units or RCHs?Anonymousnoreply@blogger.com