150g Hammer Battlebot

Hammer Robot. This is a 150g combat robot. I'm attaching the .STEP file as well for those who want to edit.

Very simple build that doesn't require many extra tools. Wedges can be printed or cut out of a sturdy material. 0.5mm Titanium is ideal. But Plexi/Acrylic also work as well. If printing scale them in Z to make them thicker

Hammer arm should be cut out of material like Aluminum or Steel. Use the print as a template to cut. Or use a service like SendCutSend and have them laser cut for you.

The lego hub has tolerances to printed easily on my printer and be a snug fit, but attaching a tighter tolerance version incase you need it.

You can use #4 Plastite screws for everything (to save on buying parts). But I use #3 for the top armor and top panels and #4s to attach the wedges to the frame

Use a #3 drill bit to clear out the holes in the hammer gear and base uprights.

BOM:
Links here: https://docs.google.com/spreadsheets/d/1HqPwgTid8flR8bDFijHdza18m8T-cTUwRuQyM6YLlmM/edit#gid=1653639653

Hardware:
1 qty - M3 x 25mm
2qty - M3x 10mm
4" Zip Ties
4-20 Plastite Screws
3-24 Plastite Screws
Wheels: Lego 24x14 Tire
2.54 Header

Electronics:

Flipper Servo: KST X12-508 Servo
Here are other variations of the servo that will work. KST DS215MG V3, ES9256 HV, KST X12-508, PTK 9495MG-D.

These are 2S servos. Power directly from your battery to get the full voltage to them. You also may need to trim the end of the servo arm to get it to fit in the gear.

I have also included a servo arm for the cheap HXT-900 servo. Not as quick, but good for messing around the house.

ESC: Malenki Nano
Drive Motors: N20 Micro Gearmotor 30:1 or 1000rpm
Battery: Nano-tech 300mah 2S Lipo Pack

I use the 4 wide 2.54mm Headers as my link.