> >> Edward Klepeis wrote:

 >>
 >> Dear Doug of japan
 >> I believe the alloy on the pulleys are 7075 I will know more
about them when
 >> I get them for my eng.The gentleman from the co. would like to attend
 >> Sun N Fun next year  I think he has alot to offer the rotary
movement. I am
 >> looking forward to work with him on this project.
 >> Regards
 >> Ed
 >> techwelding@comcast.net

 > You can always hard anodize them Doug to cut the wear.
 >
 > Paul Lamar

-Douglas Fir wrote:

 Paul

 Yes  Paul like T6 hard anodizing. For surface.  I was concerned they might
 be (lawn chair) aluminum 6061 which is not durable enough for that
 application. Too soft.

   I make the cog belt pulleys on my redrive units from 6061 and have
them hard anodized and there is no sign of any were after several
hundred hrs on them.

   Ken

 
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