Products Description Features and application scenarios of RV series worm gear reducerRV reducer is based on the parameters of cylindrical worm gear and worm gear in line with the national standard GB10085-88, absorbs the most advanced technology at home and abroad, and has a unique and novel “square box” shape structure. It has the following advantages:1. The mechanical structure is compact, the volume is light and the shape is small and efficient;2. Good heat exchange performance and fast heat dissipation;3. Easy to install, flexible and light, superior performance, easy to maintain and repair;4. Smooth operation, low noise and durable;5. Strong applicability, high safety and reliability.RV series worm gear reducers have been widely used in mechanical reducers of process equipment in metallurgy, mining, chemical industry, food, 2571 CNC machining off-center spindle top precision manufacturer machining prototype stainless steel crusher eccentric shaft beverage, textile, packaging, environmental protection and other industries and fields. It is well received by users and is the best choice for modern industrial equipment to achieve large torque, large speed ratio, low noise and high stability of mechanical deceleration transmission control devices. Product Paramenters Product NameNRV Worm GearboxColorBlue/Silver Or On Customer RequestRatio5-100Model 25 30 40 50 63 75 80 90 110 130 150Material of HousingCasting Iron/Aluminum alloyBrandBeiji or customizedOutput FormSolid shaft/hollow shaftUsages:Metallurgical industry, mining industry, chemical industry, food industry, beverage industry, textile industry, packagingindustry, environmental protection industry Company Profile About US HangZhou Jinhongda Transmission Equipment Co., Ltd is a modern enterprise integrating industry and trade. Our sales department is located in HangZhou baoan district. A total of 15 employees are responsible for domestic and international operations.In China, We has established the Pearl River Delta as the center to cover the national sales network. Our products are also exported to the United States, Germany, France, Holland, CZPT Hydraulic motor A6VM spare parts swash plate cylinder block pistons set plate drive shaft center pin valve plate Spain, Korea, Japan, Saudi Arabia, Thailand and other countries and regions. Our factory is located in HangZhou, ZheJiang , covering an area of 10,000 square meters.Our factory has dozens of professional CNC machining equipment and several precision measuring equipment and more than 100 professionals.The company has been adhering to scientific and technological innovation, research and introduction of advanced technology, and constantly develop new products to meet the market demand.The monthly production capacity reaches 10,000 units. Our main products are BeiJi precision planetary reducer, R/ S/F/K series helical gear reducer, RV reducer, small gear reducer, medium gear reducer, cast iron worm gear reducer, CAM splitter and other transmission equipment.We can also provide OEM products and special purpose products. We have a strong technical capability, has obtained ISO 9001:2008 quality management system certification and manufacturing in strict accordance with the requirements. Our products have been widely used in petroleum, Hot selling RC Crawler Car parts 30mm Metal Copper Drive Shaft chemical equipment, plastic machinery, rubber machinery, food machinery, packaging machinery, three-dimensional parking garage and assembly line and other machinery and equipment fields, won the majority of users’ satisfaction and praise.If you have needs, please contact us. Certifications Why Choose Us Packing and Shipping Product application scenarios FAQ Q: Are you a trading company or a manufacturer ?A: We are a speed reducer gearbox manufacturer in ZheJiang Province, China. Our company owns the ability ofmanufacturing,processing, designing and R&D. Q:What information should i tell you to confirm the worm gearbox?A:Model/Size,B:Ratio and output torque, C:Power and flange type,D:Shaft Direction,E:Housing color,F:Order quantity. Q: Can you customize according to our requirements?A: Yes, CZPT custom 22mm 3v 6v 12v 24v micro planetary plastic gearbox dc motor for toy car we can design non-standard products according to customers’ drawings and samples. Q:What is the payment term?A:T/T and Paypal is used more,please contact us for details Q: How long is the delivery date?A: 10 – 20 business days.

An Overview of Worm Shafts and Gears

This article provides an overview of worm shafts and gears, including the type of toothing and deflection they experience. Other topics covered include the use of aluminum versus bronze worm shafts, calculating worm shaft deflection and lubrication. A thorough understanding of these issues will help you to design better gearboxes and other worm gear mechanisms. For further information, please visit the related websites. We also hope that you will find this article informative.

Double throat worm gears

The pitch diameter of a worm and the pitch of its worm wheel must be equal. The two types of worm gears have the same pitch diameter, but the difference lies in their axial and circular pitches. The pitch diameter is the distance between the worm’s teeth along its axis and the pitch diameter of the larger gear. Worms are made with left-handed or right-handed threads. The lead of the worm is the distance a point on the thread travels during one revolution of the worm gear. The backlash measurement should be made in a few different places on the gear wheel, as a large amount of backlash implies tooth spacing.
A double-throat worm gear is designed for high-load applications. It provides the tightest connection between worm and gear. It is crucial to mount a worm gear assembly correctly. The keyway design requires several points of contact, which block shaft rotation and help transfer torque to the gear. After determining the location of the keyway, a hole is drilled into the hub, which is then screwed into the gear.
The dual-threaded design of worm gears allows them to withstand heavy loads without slipping or tearing out of the worm. A double-throat worm gear provides the tightest connection between worm and gear, and is therefore ideal for hoisting applications. The self-locking nature of the worm gear is another advantage. If the worm gears are designed well, they are excellent for reducing speeds, as they are self-locking.
When choosing a worm, the number of threads that a worm has is critical. Thread starts determine the reduction ratio of a pair, so the higher the threads, the greater the ratio. The same is true for the worm helix angles, which can be one, two, or three threads long. This varies between a single thread and a double-throat worm gear, and it is crucial to consider the helix angle when selecting a worm.
Double-throat worm gears differ in their profile from the actual gear. Double-throat worm gears are especially useful in applications where noise is an issue. In addition to their low noise, worm gears can absorb shock loads. A double-throat worm gear is also a popular choice for many different types of applications. These gears are also commonly used for hoisting equipment. Its tooth profile is different from that of the actual gear.

Bronze or aluminum worm shafts

When selecting a worm, a few things should be kept in mind. The material of the shaft should be either bronze or aluminum. The worm itself is the primary component, but there are also addendum gears that are available. The total number of teeth on both the worm and the addendum gear should be greater than forty. The axial pitch of the worm needs to match the circular pitch of the larger gear.
The most common material used for worm gears is bronze because of its desirable mechanical properties. Bronze is a broad term referring to various copper alloys, including copper-nickel and copper-aluminum. Bronze is most commonly created by alloying copper with tin and aluminum. In some cases, this combination creates brass, which is a similar metal to bronze. The latter is less expensive and suitable for light loads.
There are many benefits to bronze worm gears. They are strong and durable, and they offer excellent wear-resistance. In contrast to steel worms, bronze worm gears are quieter than their counterparts. They also require no lubrication and are corrosion-resistant. Bronze worms are popular with small, light-weight machines, as they are easy to maintain. You can read more about worm gears in CZPT’s CZPT.
Although bronze or aluminum worm shafts are the most common, both materials are equally suitable for a variety of applications. A bronze shaft is often called bronze but may actually be brass. Historically, worm gears were made of SAE 65 gear bronze. However, newer materials have been introduced. SAE 65 gear bronze (UNS C90700) remains the preferred material. For high-volume applications, the material savings can be considerable.
Both types of worms are essentially the same in size and shape, but the lead on the left and right tooth surfaces can vary. This allows for precise adjustment of the backlash on a worm without changing the center distance between the worm gear. The different sizes of worms also make them easier to manufacture and maintain. But if you want an especially small worm for an industrial application, you should consider bronze or aluminum.

Calculation of worm shaft deflection

The centre-line distance of a worm gear and the number of worm teeth play a crucial role in the deflection of the rotor. These parameters should be entered into the tool in the same units as the main calculation. The selected variant is then transferred to the main calculation. The deflection of the worm gear can be calculated from the angle at which the worm teeth shrink. The following calculation is helpful for designing a worm gear.
Worm gears are widely used in industrial applications due to their high transmittable torques and large gear ratios. Their hard/soft material combination makes them ideally suited for a wide range of applications. The worm shaft is typically made of case-hardened steel, and the worm wheel is fabricated from a copper-tin-bronze alloy. In most cases, the wheel is the area of contact with the gear. Worm gears also have a low deflection, as high shaft deflection can affect the transmission accuracy and increase wear.
Another method for determining worm shaft deflection is to use the tooth-dependent bending stiffness of a worm gear’s toothing. By calculating the stiffness of the individual sections of a worm shaft, the stiffness of the entire worm can be determined. The approximate tooth area is shown in figure 5.
Another way to calculate worm shaft deflection is by using the FEM method. The simulation tool uses an analytical model of the worm gear shaft to determine the deflection of the worm. It is based on a two-dimensional model, which is more suitable for simulation. Then, you need to input the worm gear’s pitch angle and the toothing to calculate the maximum deflection.

Lubrication of worm shafts

In order to protect the gears, worm drives require lubricants that offer excellent anti-wear protection, high oxidation resistance, and low friction. While mineral oil lubricants are widely used, synthetic base oils have better performance characteristics and lower operating temperatures. The Arrhenius Rate Rule states that chemical reactions double every ten degrees C. Synthetic lubricants are the best choice for these applications.
Synthetics and compounded mineral oils are the most popular lubricants for worm gears. These oils are formulated with mineral basestock and four to six percent synthetic fatty acid. Surface-active additives give compounded gear oils outstanding lubricity and prevent sliding wear. These oils are suited for high-speed applications, including worm gears. However, synthetic oil has the disadvantage of being incompatible with polycarbonate and some paints.
Synthetic lubricants are expensive, but they can increase worm gear efficiency and operating life. Synthetic lubricants typically fall into two categories: PAO synthetic oils and EP synthetic oils. The latter has a higher viscosity index and can be used at a range of temperatures. Synthetic lubricants often contain anti-wear additives and EP (anti-wear).
Worm gears are frequently mounted over or under the gearbox. The proper lubrication is essential to ensure the correct mounting and operation. Oftentimes, inadequate lubrication can cause the unit to fail sooner than expected. Because of this, a technician may not make a connection between the lack of lube and the failure of the unit. It is important to follow the manufacturer’s recommendations and use high-quality lubricant for your gearbox.
Worm drives reduce backlash by minimizing the play between gear teeth. Backlash can cause damage if unbalanced forces are introduced. Worm drives are lightweight and durable because they have minimal moving parts. In addition, worm drives are low-noise and vibration. In addition, their sliding motion scrapes away excess lubricant. The constant sliding action generates a high amount of heat, which is why superior lubrication is critical.
Oils with a high film strength and excellent adhesion are ideal for lubrication of worm gears. Some of these oils contain sulfur, which can etch a bronze gear. In order to avoid this, it is imperative to use a lubricant that has high film strength and prevents asperities from welding. The ideal lubricant for worm gears is one that provides excellent film strength and does not contain sulfur.