86 Tooth GT2 pulley knob

86T pulley for GT2 belt fits knob on a rotary table

Maker/DIY

Creative Commons Attribution Share Alike

Commercial use is allowed, you must attribute the creator, you may remix this work and the remixed work should be made available under this license.

Learn more or download attribution tags

Description

86T pulley for GT2 belt is a slip fit over the knob on one particular 4" rotary table (ebay item 170729688086). This particular table has a 72:1 reduction worm drive. It might be better to have made this 85 teeth, with a 17 tooth driver on the stepper shaft pulley. That would give 85/17 = 5:1 reduction or overall 5*72 = 360, so one full turn of the stepper shaft would be exactly 1 degree on the rotary table. This pulley body is hollow to fit the handle, so flip the .STL file over 180 degrees before printing to avoid an overhang problem. The source OpenSCAD file is provided (but note, this one takes a long time to render, 8 minutes on my PC). It is derived from "drofarts" parametric pulley file, thing:16627

UPDATE: I added an 85-tooth version (that is the "bronze" color version in photos). The wall thickness is only 1.0 to 1.8 mm thick across the toothed part, but it seems to work so far. Here it is in motion:

Documents

Issues

Issues are used to track todos, bugs or requests. To get started, you could create an issue.

Comments

1abae89a57e65bed05b23ca897b7ade2?default=blank&size=40Chretien Dunjour added this to the todo collection ago
Dfe5d99e6e5229932c9d918febcd48e0?default=blank&size=40Chema added this to the Cnc collection ago
B21da4db0cf3410d41103e3338b481fd?default=blank&size=40ProjectCentral added this to the UTILITY collection ago
6fe419e9d9e8a893bf30f7b9d92b1f68?default=blank&size=40kesjeff added this to the Misc collection ago
24ee2577539ae18c4b0af758a9234ad4?default=blank&size=40Tongdam added this to the Pulley collection ago
Mini jb computerjbeale published this design ago