Hey, so it’s been a while, had some time to relax and not focus on school and so with the insights provided by @JLabs and the wax model that @CamBo did, decided to pump out a complete CNC series for Abec 11 Flywheels (not including the 107’s, that will come at a later date when I have more time), Flywheel Clones, and MBS All Terrain Wheels.
These files are meant for CNCs and as such the tolerances are not ideal for 3D printing. On this series it’s not a huge deal, I think the only issue youd have is the hole for the 10-32 screws would be very tight if you dont ream them out. But I’ve made a second set of all of these where the portion of the pulley that inserts into the wheel is one piece and the pulley is a secondary removable piece so you can swap the pulleys without having to machine a new hub portion. That I’ll share later as I havent completed uploading the hoard of files to thingiverse.
So for now, here you go.
32T: http://www.thingiverse.com/thing:2093152 33T: http://www.thingiverse.com/thing:2093159 34T: http://www.thingiverse.com/thing:2093165 35T: http://www.thingiverse.com/thing:2093172 36T: http://www.thingiverse.com/thing:2093191 37T: http://www.thingiverse.com/thing:2093198 38T: http://www.thingiverse.com/thing:2093200 40T: http://www.thingiverse.com/thing:2093209 42T: http://www.thingiverse.com/thing:2093219 44T: http://www.thingiverse.com/thing:2093229 48T: http://www.thingiverse.com/thing:2093235 50T: http://www.thingiverse.com/thing:2093244
So for those who have not looked at the group buy posts, USA/CAN and EU, the original file that was sent for CNCing was an exact copy of the 3D printed files I’ve provided online with some minor changed but it turned out those were .5mm too large. @JLabs graciously offered to lathe them down to correct the issue for those that had been currently made. With that information and also by destroying one of my own flywheel clones to extract the hub I worked with @CamBo over the period of a a week or two to make a pulley that he’s going to be making for his build and I figured I’d put the information to good use. So CamBo CNCed one pulley as a test for himself, and they fit well. His picture is referenced in the links but he’s also posted it in the no pics post so you can check it out there too. These will require at least 2.25" 10-32 or 10-24 bolt or an M5 of 60mm
The nominal widths of these are 9mm, 12mm and 15mm but their true actual widths are 10mm, 13mm and 16mm. I do not plan on adjusting these unless it’s a complete waste of axel room but even enertions’s 9mm pulley is 10.4mms so I dont think it’s an issue. So if you want exactly 9mm, 12mm or 15mm then you may instruct the machinist to rework them once they have been CNCed. There is no loss of quality by reworking these after the fact. Just throw them on the lathe and remove the extra 1mm or whatever you want. Step appears to be a common industry file format for transferring data for CNCs though I’ve included the STL’s as well as thats whats @CamBo used to create his.
These are designed to be machined using a 1/8th end mill bit, tool nose radius compensation has been taken into consideration while designing these, if that means something to you, they youre ready to make your own.
And pics because I love picture so I figure I’m not the only one.
@CamBo’s CNCed pulley
Here’s the Retainer Ring
32T
33T
34T
35T
36T
37T
38T
40T
42T
44T
48T
50T
And the assembly together. Socket Head Cap Screws used here are 2.25" in length, 60mm ones would sit just below flush. The pulley shown here is the 9mm (10mm) pulley.
