Re: (ET) Drive chain - how tight?

["David Roden" <etpost drmm net>]

Thanks to Chris for the thoughts on this - it helped!

Some research in the library with all its books on the floor :-\ suggests 
a 
standard slack for drive chains of 2-4% of the distance between the 
sprocket centers.  Some sources say 1-3%.  This is to be measured midway 
along the chain span.  

The R-36's transmission drive sprocket and axle sprocket centers are 
abouit 
12" apart, so the chain slack should be 1/4" to 3/8".  

The amount of pressure to put on the chain for measuring this isn't quite 
as clear, so I take it as "a little," or "a gentle finger press."  This 
ends up being a somewhat snugger chain than I used to set on my red 26" 
one-
speed coaster-brake Columbia back in the 1960s.  

Someone I read along the way suggested chainsaw bar oil for lubricating 
the 
chain.  I've been using spray-on white lithium grease for that.  We'll see 
whether the bar oil lasts longer, and how much glop and glump it attracts. 
 


David Roden - Akron, Ohio, USA

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