Building a 4th Axis for my CNC G0704 Milling Machine

An overview of my new 4th axis for my CNC G0704 milling machine!

Stuff I used (or at least more reliable resources for them)
Mini Lathe Headstock Assembly: https://littlemachineshop.com/product...
Nema 23 Stepper Motor: https://www.automationtechnologiesinc...
Stepper Motor Driver:https://www.automationtechnologiesinc...
Power Supply: https://www.automationtechnologiesinc...
Tapered Roller Bearings (The Ones I used) https://amzn.to/2Zz6db8
Tapered Roller Bearings (The Nicer Ones) https://amzn.to/2VHwPWk
GX16 Connectors: https://amzn.to/2YZZkR7
120T GT2 Timing Pulley: http://shop.sdp-si.com/catalog/produc...
20T GT2 Timing Pulley: http://shop.sdp-si.com/catalog/produc...
Timing Belt Length Calculator: https://sdp-si.com/eStore/CenterDista...

The Endcap I designed for this slightly larger "NEMA23" (NEMA24?) Stepper Motor: https://www.thingiverse.com/thing:452...

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