jamesp
Cave Dweller
Member since October 2012
Posts: 36,561
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Post by jamesp on Feb 24, 2016 8:22:59 GMT -5
Yes. Diameter of rubber wheel to diameter of contact point on disc would be reduction ratio.
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70karmann
starting to spend too much on rocks
Member since February 2011
Posts: 190
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Post by 70karmann on Feb 25, 2016 0:54:55 GMT -5
I have the Covington model of this design. I prefer my Covington rotary tumblers and Lortones. The Covington model is very quiet as the drum is poly vinyl. I had to get new thrust washers for mine (important to operation ) and a call to Covington. They gladly sent some for free. Great customer service. My covington rotary tumblers (3) have been going strong for over 12 years.
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MrCoffee
has rocks in the head
Member since December 2005
Posts: 634
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Post by MrCoffee on Feb 11, 2018 4:03:16 GMT -5
One disadvantage of the Covingtons, is the newer barrels that wear out faster. But their chassis is the best in the business for more affordable machines. So, a worn out barrel may be worth replacing over a 5 year period as opposed to a worn out Lorton chassis or warped hard Lortone rubber barrel. My experience with the Lortones, is that rocks tend to chip and break. My Covington does not have this issue. I have noticed too, that the Lortone takes longer for the grinding task. I may consider a Covington 250, as it is the closest to a Slik that's still on the market. It seems like it is priced well for smaller batches, and the time savings could help cover the cost of new barrels.
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