McKissick Roll-Forged sheaves contain the following critical standard features: 1. Smooth radius at the rim, eliminating sharp corners that can damage rope. 2. Size for size, McKissick Roll-Forged sheaves have a thicker section under the tread of the wire rope groove, providing more support of the wire rope. 3. Thicker web on sheave provides required stiffness to support a stronger sheave that contains thicker flange section. 4. Heavier flange sections - provide a much stronger wire rope groove and maintain proper consistent groove angles, ensuring long term wire rope performance. 5. Minimum 35Rc for higher hardness in the bottom of the groove - results in less wear to the sheave, thus extending life of wire rope. 6. Precision alignment of hub with blank, then finished with a deep penetrating weld - ensuring proper fit, longer life and confidence during the most extreme of applications. Crosby and McKissick Roll-Forged Sheaves " Reliability You Can Depend On"