In ZQA hard-toothed surface reducer is in original ZQ type reducer basis without changing reducer appearance and installation dimensions, just in deceleration machine improved, axis adopt 42crm, first conditioning heat treatment, gear adopts forgings, carburizing and gear grinding, improves the rigidity, reducing noise and improve the service life.

Model have ZQA250 - ZQA1000, for 8.23-48.57 ratio, assembly form and ZQ reducer as nine.