Coffee Grinder Handle
thingiverse
The shaft on my coffee grinder started to wear of due to the flat crank handle with small surface area; therefore I was looking for a crank handle replacement. I remixed an existing design of the rotary crank handle to improve upon its several shortcomings. ###Improvements### * Metal screw is added to the knob to improve robustness * teflon tube is mounted on the screw to minimize friction * contact surface area at the pentagonal shaft is maximized ###List of materials### 1. truss head M4x30mm screw 2. M4 washer 3. M4 nut 4. teflon tube OD 4mm, ID 3mm, cut to 9mm length 5. 3d printed knob 6. 3d printed crank ###Notes### A smaller teflon tube is used used intentionally to get a tight fit on the M4 screw. First, I screwed a teflon tube on the screw gently using pliers and then cut it down to required length.
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