Specifications include, but are not limited to: • ASTM-A514 (T-1) steel plate shall be used in manufacturing. 400 brinell wear plate shall be used in high wear areas that come in contact with the product. • To ensure the highest standards of fabrication, all welders shall be certified. • All Clamshell Bucket cutting edges (lips) shall be hand ground for a tight fit. Options shall include sealed lips and reversible bolt-on lips. • All sheaves shall have anti-friction roller bearings or manganese bronze bushings. • Guide rollers made with #4140 and hardened to 450-500 brinell. • All rollers shall have sealed bearings. • Oversized bushings shall be used at hinge points (bearings area) for longer life. • Steel cables shall have a minimum of 5:1 safety factor. • All shafting shall be heat-treated and stress-relieved #4140 material. All standard steel bushings are hardened to 450-500 brinell.