HMA Flow & Industrial has considerable experience in replacing older-style worm drives from Imperial to metric. Over-, under- and side-driven units are all available, as are drop-in replacements. Features include high efficiency and load-carrying capacity, combined with long life and reliable service. The power range is up to 250 kW, while the reduction ratio range is up to 4 900:1. Sizes range up to a 710 mm centre distance.