Swati Pulley Company Pvt. Ltd. Supplies Rotary Controlled Gravity Indicators. Swati Pulley Company Pvt. Ltd. Is an ISO 9002 registered organisation. The Rotary Controlled Gravity Indicators is a device for visual reading of machine settings. These indicators are used where it is required to know, maintain or set machine or control functions [m, mm, kg, 1, rpm, degrees, etc]. The Rotary Controlled Gravity Indicators are of gravity controlled design. Gravity Indicators are used on control spindles with positions ranging from horizontal up to 60 degree inclined. Rotary Controlled Gravity Indicators are most accurate when used on a horizontal control spindle, the precision decreases as the inclination increases. These indicators come with or without the hand wheel. Rotation of the hand wheel causes the pointers to move while the calibrated dial is kept stationary by the gravitational force.