Article List

• How to determine whether the dual-stage NGW121 planetary gear reducer needs repair or replacement

  To determine whether the double-stage NGW121 planetary gear reducer needs to be repaired or replaced, you can start from the following aspects: Appearance inspection: Check whether the reducer shell has cracks, deformation or damage. If these situations exist, it may affect the stability of its internal structure and needs to be repaired or replaced. Check whether the connection parts, such as bolts, nuts, etc. are loose. Loose connections may cause vibration and abnormal noise during operation. They need to be tightened in time. If the connecting parts are damaged, they need to be replaced. In addition, it is necessary to observe whether there is any oil leakage. If lubricating oil leaks in the oil seal, end cap, etc., it may be that the seal is aging or damaged, and the seal needs to be replaced. Sound judgment: The sound of the reducer in normal operation is stable. If there is a harsh, sharp, impactful or irregular sound during operation, it may be caused by gear wear, poor meshing, bearing damage, etc. It is necessary to further check the internal components and determine whether to repair or replace according to the degree of damage. Temperature inspection

  July 18, 2025
• What are the common installation errors that affect the normal operation of the NGW42-35.5-7.5KW planetary reducer

  The following are some common installation errors that affect the normal operation of the NGW42-35.5-7.5KW planet reducer: Coaxiality difference: The centering deviation between the motor and reducer coupling is too large, and the radial deviation is > 0.1mm Or the angle deviation is >0.05mm When the input bearing is subjected to additional bending moment. In addition, if special tooling is not used during installation, knocking the bearing will cause loose fit between the inner ring and the shaft journal, and the interference amount is less than <0.003mm, which will cause minor wear. These situations may affect the normal operation of the reducer, resulting in the appearance of the outer ring raceway of the bearing 'False Brunch indentation', uneven wear of gears along the tooth width direction. Improper adjustment of meshing clearance: The gear meshing gap is too small, and the teeth surface will be adhered and worn due to compression under load; the side gap is too large, and impact load will be generated during startup or reversing, causing the teeth surface to peel off. Data show that for every 0.02mm reduction in side gap, the contact stress of the tooth surface increases.

  July 18, 2025
• How to choose a material suitable for DFY320 hard toothed gear reducer

  DFY320 Hard-toothed gear reducer is mainly composed of gears, gear shafts, box and other components. When choosing suitable materials, you must comprehensively consider the working requirements and performance characteristics of each component. The following are specific material selection methods: gear and gear shaft material considerations: strength and hardness need to be considered to meet the load-bearing capacity requirements; wear resistance to ensure service life; corrosion resistance, adapt to specific working environments; processing performance, easy manufacturing and processing; and cost, comprehensively considering cost-effectiveness. Material recommendation: Commonly used materials include 20CrNiMo, 20CrNi2Mo, 42CrMo and other fine rolled alloy steels. These materials have high strength and toughness and are suitable for high-speed and high-load transmission requirements. 20CrMnTi can also be used, which can meet the requirements of hard-tooth surface gear after carburizing, high-frequency surface quenching heat treatment specifications and teeth grinding. Cabinet material considerations: The box must bear the support shaft system, sealing and lubricating medium, and bearing

  July 17, 2025
• How to optimize the heat treatment process of DFY280 reducer while ensuring stable quality

  The optimization of the heat treatment process of the DFY280 reducer requires comprehensive consideration of factors such as material characteristics, part structure and performance requirements. The following are some optimization methods under the premise of ensuring stable quality: Reasonable selection of heat treatment methods Surface quenching: For the gears of the DFY280 reducer, high-frequency quenching can be used if the size is small; if the size is larger, flame quenching is more suitable. Surface quenching can improve the hardness of the tooth surface. It is best when the hardened layer includes the bottom of the tooth root, making the hardness reaching 45-55HRC while maintaining the toughness of the heart. Carburizing quenching: If the gear requires a large load-bearing capacity, the carburizing quenching process can be selected. However, the gear will deform after carburizing and quenching, and the finishing process needs to be used to eliminate it to ensure the accuracy of the gear. Nitriding: Nitriding can achieve high tooth surface hardness and wear resistance under conditions of small deformation, and can improve the load-bearing capacity without finishing the finish after nitriding, which is suitable for precision.

  July 17, 2025
• How to ensure the quality stability of heat treatment process in the fourth-level hard tooth surface DFY225 gear reducer

  To ensure the mass stability of the heat treatment process in the DFY225 gear reducer, you can start from the following aspects: Control the material quality: Choose steel with narrow hardenable belts, because the narrower the hardenable belts, the more stable the deformation. At the same time, controlling the A1/N content ratio in the range of 1-2.5 can narrow the hardenable belt and reduce deformation. Pay attention to the frame segregation and strip-like structure of the material to avoid affecting the uneven deformation and uneven carburization of the gear spline holes. Optimized preparatory heat treatment: For gear forgings of DFY225 gear reducer, if the normalized hardness is too high, the crystal is mixed, and a large amount of Sorthine or Wei's tissue is present, the inner hole will be deformed and enlarged. Therefore, temperature-controlled normalized fire or isothermal annealing can be used to treat the forgings to obtain appropriate tissue and hardness, laying a good foundation for subsequent heat treatment. Precisely set process parameters: Heating temperature and time: Accurately according to the characteristics of gear material and heat treatment process requirements

  July 16, 2025
• Effect of heat treatment process parameters on the mass stability of DFY250 gear reducer

  There is currently no specific study on the impact of heat treatment process parameters on the mass stability of DFY250 gear reducer, but it can be analyzed from the perspective of the general impact of heat treatment process parameters on gear reducer, as follows: The influence of heating temperature and time on gear hardness and wear resistance: Heating temperature and insulation time are key factors affecting gear hardness. For example, during the quenching process, appropriately increasing the heating temperature and maintaining sufficient time can make the gear material fully austenitized, and a higher hardness can be obtained after quenching, thereby improving the wear resistance of the tooth surface. However, if the heating temperature is too high or the time is too long, it may cause coarse grains, causing the toughness of the gears to decrease and cracks are prone to occur. Effect on gear deformation: Uneven heating temperature will cause inconsistent expansion of various parts of the gear, resulting in thermal stress, and thus deformation. For the gears of the DFY250 gear reducer, the higher the carburization temperature, the thicker the carburization layer, and the gear deformation

  July 16, 2025
• What factors should be considered when choosing a hard-toothed gear reducer or a soft-toothed gear reducer

  When choosing a hard-toothed gear reducer or a soft-toothed gear reducer, the load situation, working environment, speed requirements, noise limits, installation space, maintenance costs and other factors should be comprehensively considered. The specific content is as follows: Load size: If the equipment needs to withstand heavy load, such as mine crushers, metallurgical rolling mills, etc., a hard-toothed gear reducer should be selected, which has strong load-bearing capacity and can withstand large torque and impact forces. If it is a light-load equipment, such as packaging machines, textile machinery, etc., the soft-toothed gear reducer can meet the requirements. Although its load-bearing capacity is relatively low, it can also ensure the normal operation of the equipment. Working environment: The hard-toothed gear reducer can work in harsh environments such as high temperature, high humidity, and dust, and can adapt to complex working conditions in mining, cement and other industries. Soft toothed gear reducers are suitable for use in relatively mild environments and have poor adaptability to extreme working conditions. They are generally used in indoor light industrial equipment. Speed requirements: Hard-toothed reducer is suitable for high-speed occasions and has high transmission efficiency

  July 15, 2025
• How to judge the quality of hard-toothed gear reducers and soft-toothed gear reducers

  To determine the quality of hard-toothed gear reducers and soft-toothed gear reducers, you can start from the following aspects: Appearance inspection: The shell of the high-quality reducer is finely crafted, has a flat and smooth surface, and has no casting defects, scratches or rust. At the same time, the nameplate information of regular products is clear and marked with models, specifications, manufacturers, etc. If the nameplate is vague or defective, you need to be wary of product quality issues. Running sound: The quality can be judged by listening to the sound when the reducer is running. The high-quality reducer runs smoothly and has uniform sound without abnormal noise, impact or vibration. You can use a screwdriver to contact the reducer housing on one end and close to the ear to listen to the internal sound more clearly. If there are abnormalities such as harsh friction, it means that there may be quality problems. Temperature change: After the reducer with good quality has been running for a period of time, the temperature rises within a reasonable range and there will be no overheating. If the shell is very hot, it indicates poor heat dissipation or internal faults, which may be due to poor quality.

  July 15, 2025
• How to determine whether the different axial degrees of the axis line of the ZL65 soft tooth surface reducer meet the requirements

  To determine whether the different axial degrees of the axis line of the ZL65 soft tooth surface reducer meet the requirements, you can use the following methods: Use measurement tools to detect: Dial meter measurement method: Fix the dial meter to the housing or other stable parts of the reducer, so that the measuring head of the dial meter is against the surface of the shaft end to be measured, and slowly rotate the axis. The swing range of the dial meter pointer is the radial jumping amount of the axis line, and different axial degrees can be judged based on this. If the amount of jump exceeds the allowable range, it does not meet the requirements. Generally, soft tooth surface reducers allow a certain degree of shaft system deviation, if allowed The shaft system deviation within 0.15mm does not affect the transmission accuracy. Micrometer measurement method: For the journal part, you can use a micrometer to measure the diameters of different positions. By comparing the measurement values, you can judge the roundness and cylindricality of the journal, which indirectly reflects the situation of the axis line. If there is obvious non-circumference or cylindrical error in the journal, it may mean that there are different axes problems in the axis center. Observe the running status and judge:

  July 14, 2025
• What is the difference between applying grease to different models of cylindrical gear reducer

  Different models of cylindrical gear reducer grease apply different grease models, application amount and application method. The specific details are as follows: Grease model selection: Select according to speed: High-speed cylindrical gear reducers should use low viscosity and good fluidity grease, such as fully synthesized high-temperature high-speed reducer grease, which will help reduce operating resistance and prevent excessive heat from being generated due to friction. Low-speed reducers can use high viscosity greases, such as molybdenum disulfide lithium grease, which has good wear resistance and can provide good lubrication protection for gears at low speeds. Selection according to load: For light or medium load cylindrical gear reducers, ordinary lithium-based grease or molybdenum disulfide lithium-based grease can usually meet the requirements. However, heavy-load reducers require the use of fully synthetic molybdenum disulfide reducer grease, etc. This type of grease has excellent extreme pressure and anti-wear properties, and can effectively protect the gear surface under high loads and reduce wear. According to the working temperature

  July 14, 2025