Angle Grinder
Brand: Makita
Model: GA4033

Sand Belt (Circumference: 533mm, Width: 30mm)
Brand: Utoolmart

Bearing (Outer diameter: 35mm, Inner diameter: 10mm, Width: 11mm)
Brand: NTN
Model: 6300LLB

Speed Controller
Brand: サンウェイ
Model: SC-01

The belt of the belt sander remains in a position with a long circumference.
It is essential to securely attach the base plate to the grinder body. (I shaved off a small protrusion.)
For safety, the RPM has been reduced to about 5000 for the test run.