Universal Servo Interface Flexible slotted bolt circle and oversized pilot equals easy motor installation and no adapters Modular High Tech Design Modularity and flexible design offer an advanced technology reducer that can be universally mounted Low Backlash Spanner design guarantees for precise placement of bevel gears and insures backlash down to 3 arc minutes Quiet and Smooth Helical teeth provide quiet, smooth operation at high speeds Balanced clamp on collar guarantees smooth operation at high speed