Westec has manufactured and sold hundreds of purse blocks to customers around the world and the Westec blocks have proven their strength and durability by operating trouble-free in many diverse marine conditions. Upon final assembly and on-site inspection, all blocks are pull-tested by a registered testing facility and certified with 20 ton or 30 ton safe working loads. High strength alloy steel shafts, bronze bearing runners, rubber coated oil seals and high quality spherical bearings are the remaining components incorporated into the purse blocks. The purse block bodies are cast from high strength alloy steel and the sheaves are cast in a nickel-manganese alloy, which offers not only outstanding strength and durability but also excellent corrosion resistance. Like all Westec products, the purse blocks have been engineered and designed to work in the most extreme marine environments. The ‘B’ version of the power block is still available for sale, but the price is lower than a new block. If you’re interested in purchasing a PowerBlock for your John Deere B tractor, you can look for used parts or an entire engine. The power blocks are also a great addition to a working machine. has been manufacturing 2 sizes and 3 configurations of purse blocks since the early 1980s: 20 ton open or closed purse blocks and a 30 ton open purse block. A power block can easily make 40 horsepower.
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