This standard provides guidelines for the design, rating and application of globoidal wormgearing mounted at a 90 degree angle. Specific definitions for globoidal wormgearing are presented, along with formulas for determining the geometric sizes of the major features for the worm and gear. Design considerations, design procedures, gear blanks, and self-locking conditions are also discussed. Procedures for rating the load capacity of globoidal wormgearing are included.