The Z series hard tooth surface gear reducer is the heavy-duty parallel shaft workhorse for mining, cement, steel, and bulk material handling plant. Three stage counts cover the full ratio band: single-stage ZDY for high-speed reductions, two-stage ZLY for the most common mid-range duty, and three-stage ZSY for slow, high-torque applications.
All gears are carburized to HRC 58-62 and ground after heat treatment, so the hardened tooth surface carries roughly five times the load capacity of an equivalent soft-tooth-surface unit in the same frame. That is what allows the larger frames — up to ZSY630 — to deliver output torque into the tens of thousands of newton-metres from a housing that still fits standard foundations and coupling arrangements.
Ratios run from 1.25:1 on the single-stage frames to 100:1 on three-stage units, with input speeds from 750 to 1,500 rpm. Every reducer is matched to the duty point before the order is released: ratio, service factor, thermal rating and shaft loads are checked against your driven equipment, and each unit is run-tested before dispatch.
Foot-mounted housings with solid or hollow output shafts suit direct coupling or shaft mounting through a torque arm. Backstops, cooling arrangements and oil pumps are available for inclined conveyors, mills and other demanding duties.
Frame sizes ZDY80-560, ZLY112-710, ZSY160-630
Ratios 1.25:1 – 100:1, output torque up to 60,000 N·m
Carburized and ground gears, HRC 58-62; run-tested before dispatch
