Servo Polytech Coimbatore [P] Ltd. Supplies Surface Groove Designed Flyer Bobbins. Servo Polytech Coimbatore [P] Ltd. Is an ISO 9001:2000 accredited company. Surface Groove Designed Flyer Bobbins are made out of superior grade of polymers [ABC, PP] to ensure durability and longer life. Surface Groove Designed Flyer Bobbins has eccentricity which is minimized within the tolerance to achieve higher simplex spindle rpm. This flyer bobbin has the quality of clearance / tolerance which is closely maintained between spindle and bobbin to ensure no jerk or jump of bobbins while starting and in running of the machine. These are made as per the textile machinery manufacturer`s dimensional specification of International Standards. The surface groove designed of the bobbin is used to ensure hold, until the last layer roving in its position. It is suitable wide range of machineries.