The following spare materials I had lying around to make a DIY weed whacker.
1. 18VDC electric motor.
2. Broom handle.
3. Pushbutton Switch.
4. LiFePO4 Battery 12.8V.
5. Microwave oven food cover.
6. PVC Trunking Cover.
7. 1.3mmsq 2 core copper wire cable.
8. XT60 connectors.
9. Miscellaneous Screws, bolts, etc.
The finished product actually impressed me with how well it cut those hard stem weeds.
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Step 1: Motor, Safety Guard and Cutting Blade.
The motor has 2 threaded holes for screws which I used to mount the clear plastic guard over. An 8inch length of PVC trunking cover I used as the cutting blade.
Step 2: Power Supply.
This small 12.8V LiFePO4 battery is used to provide power via XT60 connectors and a pushbutton switch. The runtime is approximately 45mins.
Step 3: Completion!
With the broom handle attached with the switch and battery mounted, a short test confirmed proper clockwise rotation from the user's POV.
This whacker will be my new tool for yard maintenance since a new electric whacker is beyond my budget at this point. Also I hate those gas engine versions.