The outer ring has five eccentricity at the position of (2, 4, 6, 8, 10), each of which is a multiple of the number. 
For example: a card at number 8, the eccentric distance is 16mm. 
 
The aligning center is a bit, and when the work is kept rotating, the position of the head can be adjusted, and it is difficult to prevent the steel ball from falling because of holding the vibration part of the bottom and the outer ring.If the numbers are out of order, adjust the balance plate and the numbers, adjust the width of each turn in the opposite direction, two millimeters, and adjust again and again.Adjustable Eccentric Item specifics
Brand Name:MARFLOItem Type:Sponges, Cloths & BrushesItem Height:6cmItem Width:8cmItem Length:8cmSpecial Features:Fit to Sponge Polishing PadItem Weight:0.5kgMaterial Type:Sponge Polishing PadItem Diameter:3inch Sponge Polishing Pad:fit with dieeferent sizeFit Polishing Plate Sanding Pad:Upgrade Polisher