ZQH Series reducers are heavy-duty upgraded versions of ZQ reducers, featuring hardened gear technology and reinforced structures, specifically developed for continuous operation and high-load applications.

Structural & Technical Comparison

Item	ZQ Series	ZQH Series
Gear Type	Cylindrical gears	Hardened cylindrical gears
Heat Treatment	Standard heat treatment	Advanced hardening process
Load Capacity	Medium to heavy load	Heavy load / high torque
Operating Duty	Intermittent or continuous	Continuous heavy-duty
Wear Resistance	Good	Excellent
Service Life	Standard industrial level	Extended service life
Typical Applications	Conveyors, general machinery	Mining, cement, heavy conveyors

ZQH Series reducers adopt hardened gear surfaces through advanced heat treatment, significantly increasing surface hardness and fatigue resistance. This allows ZQH reducers to withstand higher torque and continuous heavy loads without accelerated wear.

Performance Advantages

ZQH reducers, on the other hand, offer superior load-bearing capacity and improved shock resistance. Their reinforced housing and optimized internal structure reduce vibration and stress concentration during long-term operation.

User Benefits

For users operating under normal load conditions, ZQ Series reducers offer reliable performance with lower initial investment and easy maintenance.

For heavy-duty applications, ZQH Series reducers reduce failure risk, extend maintenance intervals, and minimize downtime. This directly lowers total cost of ownership in high-load and continuous-duty environments.

Evidence & Application Reliability

Field applications show that ZQ Series reducers perform reliably in standard conveyor and industrial systems when properly selected.

ZQH Series reducers demonstrate significantly longer service life in mining, cement plants, and bulk material handling systems, where continuous operation and high torque are critical.

How to Choose Between ZQ and ZQH Reducers

Choose ZQ Series if your application involves medium load, standard duty cycles, and cost efficiency is a priority.

Choose ZQH Series if your system operates under heavy load, long running hours, frequent starts, or harsh working conditions.

FAQ

Q: Can ZQ reducers replace ZQH reducers?

A: ZQ reducers can replace ZQH reducers only in medium-load applications. For heavy-duty or continuous operation, ZQH is strongly recommended.

Q: Is ZQH Series more expensive than ZQ Series?

A: Yes, due to hardened gears and reinforced structure, but the longer service life often results in lower long-term operating costs.

Q: Are mounting dimensions the same for ZQ and ZQH?

A: Some models share similar installation dimensions, but confirmation is required before replacement.

Q: Can both series be customized?

A: Yes. Shaft size, reduction ratio, mounting method, and sealing options can be customized for both ZQ and ZQH series.

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