The spinning reel design can cause the line to twist, resulting in tangles and reduced casting accuracy. Furthermore, spinning rods offer less sensitivity than other rods, making it harder to detect subtle bites. Spinning rods are unsuitable for heavy bait or big game fishing due to their lower power and strength. This is the tiny key parts of ring spinning frame which travels around the ring at 30-35 m/sec and impart twist to the yarn. The hardness of the running traveler must be within 650-700 vickers. Contact pressure between ring and traveler is up to 35N/mm². Generate high temperature (300-400°C). the mass of traveller is 16-120gm/1000 Rotational inertia is a property of any object which can be rotated. It is a scalar value which tells us how difficult it is to change the rotational velocity of the object around a given rotational axis. Rotational inertia plays a similar role in rotational mechanics to mass in linear mechanics. Indeed, the rotational inertia of an object TST9LX.