The Poly V has been designed with a larger contact surface area than V belts or flat belts with a single cord. THE POLY V HAS MULTIPLE APPLICATION BENEFITS: Improved transmission ratio is possible (Poly V 1 : 60 vs V belt 1 : 20). Does away with the need for stepped pulleys. Reduced diameters (diameters up to 9mm with the H profil compared to Gear systems can transmit power between non-parallel, intersecting, and co-planar shafts. Pros. Cons. They are non-slip drives. Mechanically strong. Deliver high transmission efficiency. Ideal for low, medium and high power transmission. More compact compared to belts and chains. Cannot be used for shafts with center distances. In the optibelt ALPHA V timing belt, these recesses are consistently available in all teeth in profiles ATC10 and ATC20. ATC-IN inserts are available in the material qualities stainless steel and zinc (ATC20 only stainless steel) in packaging units á 10, 25 or 100 pieces (ATC20 not in 100). The highest quality belts still lose nearly 50% of installed tension, while lower quality belts lose over 70% of installed tension. You cannot “feel” the correct tension on a V-Belt. On a test given to over 200 experienced maintenance personnel, only 1% tensioned a belt correctly using the “feel” method. The timing chain is located within the engine, while a timing belt is located outside the engine. 3. Durability. The material and the location are also directly related to durability. A timing chain is more durable because of its high-strength material. Timing belts make lots more noise than v-belts. My Colchester Chipmaster lathe has timing belts between the motor and variator, and between the clutch and spindle. They whine, which gets annoying after a while. Since the lathe has a clutch, the motor typically runs continuously. I'd hate to be in a shop full of those lathes. Rich eOEmJ.

timing belt vs v belt