Basically we experiment on three types of sample on the basis of their performance we select the sample and use for all A. For SAMPLE 1 (Same gear ratio ) 1.Hour hand.stl (shaft circle to pentagonal) 2. Minute hand.stl (shaft circular to pentagonal) 3. 12T gear small hole.stl ( inner shaft circular socket to pentagonal socket ) 4. 12T gear big hole.stl (Inner shaft circular socket to pentagonal socket ) 5. 32T servo gear.stl (adjust the inner socket that can be mount on s90 servo motor shaft ) B.For SAMPLE 2 (1:2 gear ratio ) (Hour hand.stl shaft circle to pentagonal) 2. Minute hand.stl (shaft circular to pentagonal) 3. 12T gear small hole.stl Increase Diameter ( inner shaft circular socket to pentagonal socket ) 4. 12T gear big hole.stl (Increase Diameter ) (Inner shaft circular socket to pentagonal socket ) 5. 32T servo gear.stl Decrease Diameter 32Teeth to 24Teeth (adjust the inner socket that can be mount on s90 servo motor shaft ) C.For SAMPLE 3 (2:3 gear ratio ) (Hour hand.stl shaft circle to pentagonal) 2. Minute hand.stl (shaft circular to pentagonal) 3. 12T gear small hole.stl Increase Diameter ( inner shaft circular socket to pentagonal socket ) 4. 12T gear big hole.stl (Increase Diameter ) (Inner shaft circular socket to pentagonal socket ) 5. 32T servo gear.stl Decrease Diameter 32Teeth to 18Teeth (adjust the inner socket that can be mount on s90 servo motor shaft )