[SEL] Ron H. - Double Keyed Shaft

[Edd Payne]

Rob.This is the first time I have seen Tangential keys mentioned.I worked at 
the local flour mill for about 30 years and all the roller mills used and 
still do use these type of keys. once you are used to setting them properly 
they are real easy to remove and re assemble.You just hit the top key in and 
they loosen up and pull out by hand.Thetas the theory anyhow they can be 
real stubborn if assembled the wrong way around.
EDD PAYNE
PO Box 364 Gulgong N.S.W
Australia
2852
Phone:0263742387
edsengns at optusnet.com.au
edsengns
----- Original Message ----- 
From: "Rob Skinner" <rskinner at rustyiron.com>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Saturday, December 15, 2007 6:03 PM
Subject: [SEL] Ron H. - Double Keyed Shaft


>I don't remember how far the discussion went on the flywheel keys on
> Ron's Blackstone, so please forgive me if I'm being redundant.
>
> Today I was looking up something else in Machinery's Handbook and came
> across a section on the keys that Ron was discussing a couple months
> ago.
>
> It states that for shafts six inches diameter and above, double keys
> should be used.  If the torque is intermittent or the power
> transmitted in both directions, then double keys should be used on
> shafts as small as four inches.  The taper on these keys is he same as
> a single key, but it's tapered on the two sides that contact the hub.
>
> Also of interest are tangential keys, where two keys are stacked side-
> by-side.  It's hard to describe, but you can see pictures if you look
> in the index under "keys."
>
> Rob
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