Rock Grinder: revised on 12th July 2021

The making recipe for my homemade rock grinder:
岩石研磨機の作り方

<Preparation> 準備物

Base machine: Kitchen Knife Sharpener: Shiko Seisakusyo STD-180E (Japanese domestic version?)	A 3D printer
Photo From Amazon	Photos from Monotaro
Diamond disks: grit #180, #320, D180mm 1mm thickness   20USD each https://www.amazon.co.jp/gp/product/B07GBVW57X/ref=ppx_yo_dt_b_asin_title_o03_s00 ダイヤモンド研削盤 #180, #320, 外径180mmx1mm厚　\2000	Glass plate x2 30x20cm 8-10mm thickness about 10-20 USD each Abrasive: Carborundum #800 500g Alundum #1500 250g about 15-30 USD each https://www.monotaro.com/g/04473003/ https://www.monotaro.com/g/04473005/ ガラス板（普通ガラス厚板29x19cmx8mm厚，コダマガラスで入手，１枚１０００円見当） 研磨剤カーボランダム(#800　500g），アランダム(#1500　少量)　モノタロウなどで入手 \3000 \1650

How to make:

Autodesk Fusion360: making 3D model(STL file)	Slicing by Cura
Left: An arbor made by using a lathe machine Right: made by a 3D printer	Tapping a reverse 5/8W screw hole by a tap.