Arc-tooth worm gear reducers are widely used in the metallurgical industry.

　　Helical‑arc worm gear reducers are widely used for speed reduction in a variety of mechanical equipment, including metallurgical, mining, machine tool, lifting, chemical processing, transportation, and construction machinery. They can be found in both harsh industrial environments and on precision automated production lines.

　　The arc‑tooth worm gear reducers comprise four series: the WHT reducer (general‑purpose), the WHX worm reducer (with the worm positioned below the worm wheel), the WHS worm reducer (with the worm positioned above the worm wheel), and the WHC arc‑tooth cylindrical worm reducer (with the worm mounted to the side of the worm wheel). Each series boasts distinct features and is suited to specific applications, allowing users to select the model that best meets their requirements.

　　Original text contains only an invisible character (U+200C ZERO WIDTH NON-JOINER). No translation available; original retained. Center distance : Depending on the model and specifications, a variety of center distances are available, such as 63, 80, 100, 120, and others.

　　Original text contains only an invisible character (U+200C ZERO WIDTH NON-JOINER). No translation available; original retained. Gear ratio Common gear ratios include 8, 10, 12.5, 16, 20, 25, 31.5, 40, and 50, among others.

　　Original text contains only an invisible character (U+200C ZERO WIDTH NON-JOINER). No translation available; original retained. Input speed : Typically no greater than 1,500 rpm; the high-speed shaft can rotate in both forward and reverse directions.

　　Original text contains only an invisible character (U+200C ZERO WIDTH NON-JOINER). No translation available; original retained. Operating ambient temperature : -40°C to +45°C; when the ambient temperature falls below 0°C, the lubricating oil must be warmed up before startup.

　　To ensure the long-term stable operation of a circular‑arc gear worm‑gear reducer, users should perform regular maintenance and servicing. This includes checking the lubricant level and quality, cleaning dirt from the housing surface, and verifying that all fasteners are securely tightened. In addition, attention should be paid to the reducer’s operating condition; if any abnormalities are detected, the machine should be stopped promptly for inspection and troubleshooting.

　　 Inspection and Verification :

　　Carefully read the instruction manual for the circular-arc helical worm gear reducer to understand its installation requirements, technical specifications, and precautions.

　　Inspect the integrity of the reducer and its components, ensuring there are no missing or damaged parts, particularly critical components such as the input and output shafts, flanges, and fasteners.

　　Verify that the motor and reducer models and dimensions are compatible, ensuring that the dimensions and fit tolerances of their mating surfaces—such as locating bosses, the input shaft, and corresponding recesses—meet the specified requirements.

　　Original text contains only an invisible character (U+200C ZERO WIDTH NON-JOINER). No translation available; original retained. Cleaning and Lubrication :

　　Clean the exterior surface of the reducer to ensure it is free of dirt and dust, paying particular attention to the flange mating surface connected to the motor and the surfaces of the input and output shafts.

　　Check that the internal lubricating oil of the reducer is sufficient, and add an appropriate amount of lubricant as required. Ensure that the oil’s quality and performance meet the reducer’s operating specifications.

Select Installation Location

　　Select a dry, clean, and well-ventilated location for installing the gearbox. Avoid mounting the gearbox in environments that are damp, contain corrosive gases, or experience significant vibration.

　　Ensure that the installation surface is level and free of debris and standing water. If the surface is uneven, make appropriate adjustments or install shims to guarantee the stability of the reducer.

　　Installation Foundation and Fixing

　　Select an appropriate mounting foundation—such as a concrete base or a steel structure—based on the reducer’s model and weight. Ensure that the foundation’s load-bearing capacity and stability meet the reducer’s requirements.

　　Place the reducer on the mounting base and use a level to verify that it is properly leveled. If it is not level, adjust it until it meets the specified requirements.

　　Secure the reducer to the foundation using appropriate anchor bolts, ensuring that the tightening torque complies with the requirements specified in the instruction manual.

　　Connect the motor to the reducer.

　　Align the motor’s output shaft with the reducer’s input shaft, ensuring that their axes are collinear and parallel. Misalignment can lead to increased vibration and noise during operation, and may even damage the gears.

　　Connect the motor to the reducer using an appropriate coupling. Ensure that the coupling’s model, dimensions, and fit tolerances meet the specified requirements. During installation, avoid striking the coupling or the reducer’s input and output shafts directly with hard tools such as a hammer to prevent damage to the bearings or gears.

　　Tighten the coupling’s fastening bolts and verify the torque using a torque wrench to ensure it meets the specifications outlined in the operating manual.