VEVOR Rolling Mill 3-in-1 Round Flat Half-Round Forming Roller Mill Machine, Manual Jewelry DIY Tool, 0.03-7 mm Adjustable Thickness, Stable & Even Rolling, for Ductile Metals, Gold, Silver, Copper

The gear ratio is a parameter used to regulate the relationship between transmission speed and torque in mechanical motion systems, The manual-operated drum gear ratio: 5.5:1 If this answer does not resolve your current issue, please contact us again for assistance.