by spencers, published
This is a 20 tooth XL series timing pulley for 3/8" belt and 1/4" shaft.
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This model is designed to be printed with a MakerBot Replicator 2, on medium print settings with 5% fill, 3 shells, and .2mm layer thickness.
This tooth geometry will not work if the part is CNC'd - it is modified to work "hot off the press" when printed with a Rep2.