1.The material is MDF.

2.Make slide parts to put the bearing.Cutting the long hole in the straight bit of 7mm.

3.Drilling 8mm.

4.Make the housing of the bearing, use a straight bit of 8mm,

5.Cutting out the tip of parts by the scroll saw.

6.The base part is paste the MDF material. and, Drilling 6.5mm for the miter slot.

7.Making a collar of 0.5mm thickness.

8.Turning outside of collar.

9.Assembly of the bearing part. The material of the shaft is the wood.

10.Mounting a guide attached to both sides of the miter slot parts. Adhere the part by actual parts matching. That's the best way.

11.Then, Fixing by screw.

12.Paste the scale plate.

Paste the number, because the scale is a usually the opposite.

Test operation. It is very good.