McKissick Products has been licensed by the American Petroleum Institute to manufacture "Roll Forged"™ Sheaves under API specifications 8A & 8C. API sheaves must meet the criteria established by the American Petroleum Institute for drilling and production hoisting equipment. Typical Oilfield applciations include: Drilling Rigs Working Units Tubing Blocks Traveling Blocks Crown Block Units McKissick manufactures all Roll Forged™ sheaves to minimal API Specifications for general use in hoisting and wire rope guide applications. Grooves are flame hardened to min. RC35 on 14" and larger O.D. as standard.

TYPICAL API SHEAVE RIM PROFILE