Bronze Bushing: Difference between revisions

Revision as of 18:34, 14 May 2018

5/16" ID for Universal Axis - 3/4" long - [1] - $1.58. 0.09 cubic inch volume - bronze is 0.3 lb per cubic inch - so each bearing is 0.03 lb.
3D printing - 1/2 lb of bronze filamet is $45. For the above 3/4" bushings - only 18 can be printed - so about $3 each.
If we reduce the length to 1/4" - we get down to $75 cents per bushing - comparable to the 50 cent price of linear ball bearings from China

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 *5/16" ID for Universal Axis - 3/4" long - [https://www.mcmaster.com/#6391k406/=1cu9tex] - $1.58. 0.09 cubic inch volume - bronze is 0.3 lb per cubic inch - so each bearing is 0.03 lb.
-*3D printing - 1/4 lb of bronze filamet is $45. For the above 3/4" bushings - only 8 can be printed - so about $6 each.
+*3D printing - 1/2 lb of bronze filamet is $45. For the above 3/4" bushings - only 18 can be printed - so about $3 each.
-*If we reduce the length to 1/4" - we get down to $2 per bushing - still 4x as expensive as linear ball bearings.
+*If we reduce the length to 1/4" - we get down to $75 cents per bushing - comparable to the 50 cent price of linear ball bearings from China