1. Core judgment basis: load and working condition requirements
Carrying capacity
The hard-tooth surface reducer (tooth surface hardness ≥350HBS) has a high single-tooth bearing capacity and can withstand impact loads. It is suitable for heavy-load applications such as mining equipment and cranes.
Soft tooth surface reducers (tooth surface hardness ≤350HBS) have low load-bearing capacity and are suitable for light-load scenarios such as agricultural machinery and logistics equipment. Long-term heavy loads can easily cause tooth surface deformation.
Speed and Efficiency
The hard tooth surface has high transmission efficiency (85%-95%) and is suitable for high-speed scenarios (such as machine tool spindle drive).
The efficiency of soft tooth surface is low (70%-85%). Due to the large friction loss, it is more suitable for low-speed equipment (such as conveyor belts).
2. Differences in materials and processes
Hard tooth surface
Material: High-strength alloy steel (such as 20CrMnTi). After carburizing, quenching, gear grinding and other processes, the tooth surface hardness reaches 58-64HRC.
The process is complex and the cost is high (50%-80% more expensive than soft tooth surfaces), but the service life is as long as 10-15 years.
Soft tooth surface
Material: medium carbon steel (such as 45 steel) or low alloy steel, only quenched and tempered, tooth surface hardness 200-350HB.
The process is simple, the cost is low, and the lifespan is usually 5-8 years.
3. Environment and special needs
Extreme environment
The hard tooth surface is resistant to high temperature and corrosion, and is suitable for harsh working conditions such as metallurgical rolling mills.
Soft tooth surface is suitable for normal environments (such as food packaging machines).
Noise and Vibration
The soft tooth surface has low noise (60-70dB) and is suitable for precision instruments.
The noise on the hard tooth surface is relatively high (75-85dB), requiring additional damping measures.
4. Selection Logical summary
Conclusion : Prioritize the selection of hard tooth surface or soft tooth surface based on load and speed requirements, and then conduct a comprehensive evaluation based on cost, environmental and noise requirements.
