Ease of Operation Jeamar's limit switch is ideal for installations where a predetermined travel distance is essential. The 'kicker' on the rope is easily adjusted to quickly alter the distance of travel on the rope. High Quality Jeamar steel sheaves are precision made from the highest quality fine-grain steel. They're tough, hassle free and they last longer. High Strength and Low Weight Jeamar steel sheaves are stronger and up to 50 percent lighter than cast iron, resulting in easier handling and installation. High Efficiency Bearings Jeamar fits its steel sheaves with high-efficiency, deep-groove, double ball bearings, for maximum efficiency, reduced friction, smooth motion, long life and high speed. Exceptional Arc of Support Jeamar steel sheaves ensure that the shape of your rope is maintained under normal load conditions. High Sheave to Rope Diameters With a minimum pitch diameter of 15:1, the rope's bending stress is reduced for longer life. Work Hardened Rope grooves are hardened during forming, increasing the life of sheave and rope. Lifetime Lubrication Precision sealed, bearings stay lubricated ensuring low maintenance. Block Loading Jeamar blocks are rated for the full working load limit at 0° rope angle.