• Swati Pulley Company Private Limited

Variable Speed Pulley

Swati offers Variable Speed Pulley Drives that can instantly convert any standard constant speed motor to a variable speed accurately, smoothly and while the machine is in motion. The speed variation achieved is 1:3 and in combination with various fixed pulleys practically full middle speed range is covered. The Pulley discs: (A) slide axially along the serrated hub (B) and are forced on to the working flanks of the variable speed belt (C) by special basked shaped springs (D). These special basked shaped springs are located in rotational symmetry on both discs and provide the required force for efficient power transmission. The connection between the pulley discs and the hub is through serrations. Due to these serrations, minor allowable surface pressures are maintained. Therefore a very long life is achieved. The drive motor with its variable speed pulley is fitted to the adjustable motor slide base. By adjusting the centre distance between the driver and driven shafts, the wide section V – belt is pulled either further in or further out of the spring loaded variable speed pulley. This changes the effective running diameter of the belt in the variable speed pulley and thereby the speed of the fixed pulley. In addition to the motor slide base, speed adjustment can be made with motor jacks or jockey pulley.