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# Mechanical power transmission

### Geometry of cycloidal gears

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This article provides answers to the following questions, among others: How is the shape of the tooth of a cycloidal gear obtained?How is a cycloid constructed?What...

### Roots type blower (supercharger)

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This article provides answers to the following questions, among others: What is a Roots-type blower?How does a Roots-type supercharger work?Why are three-lobed rotors usually used?How are...

### Undercut

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This article provides answers to the following questions, among others: What is an undercut?How does undercutting occur during gear hobbing?What effects does an undercut have on...

### Rack

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This article provides answers to the following questions, among others: How is the line of action and the line of contact determined for racks?How does the...

### Meshing of involute gears

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This article provides answers to the following questions, among others: What is the line of action of two meshing gears?How is the position of the line...

### Calculation of involute gears

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This article provides answers to the following questions, among others: center distancetip shorteningsum of the profile shift coefficients to obtain a certain center distanceoperating pressure angletransmission...

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### Profile shift

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In the case of a profile shift, the reference profile of the gear is shifted outwards in order to positively influence the meshing and the load capacity or to...

### Geometry of involute gears

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Involute toothing is often used in mechanical engineering for gears, as it offers favourable meshing and is easy to produce. Learn more about the geometry of involute gears in...

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### How does a three-speed gear hub work?

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This article provides answers to the following questions, among others: How does a three-speed internal-gear hub work?How are the different gears implemented?How does an overrunning clutch...

### Fundamental equation of planetary gears (Willis equation)

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This article provides answers to the following questions, among others: How is the relationship between the individual rotational speeds of the components of planetary gears?

### From stationary gear to planetary gear

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This article provides answers to the following questions, among others: How is a planetary gear unit constructed?How does a planetary gear work?Why are several planetary gears...

### Basics

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In belt drives, the power transmission between the pulleys is usually force-locked by flexible belts. More information on the basics of belt drives can be found in this article.

### Calculation of the belt length

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This article provides answers to the following questions, among others: How can the length of the belt of a single-stage belt drive be calculated?

### Slippage

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This article provides answers to the following questions, among others: What is meant by slippage in general and by elastic slip sliding slip in particular?Which belt...

### Belt types

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This article provides answers to the following questions, among others: What are the operating characteristics of a flat belt?What are the pros and cons of V-belts...

### Power transmission of a belt drive

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This article provides answers to the following questions, among others: What is the relationship between the circumferential force (effective force) and the forces on the tight...

### Centrifugal forces

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This article provides answers to the following questions, among others: How do centrifugal forces influence the contact pressure between belt and pulley?How can centrifugal forces be...

### Maximum belt stress

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This article provides answers to the following questions, among others: Which forces or tensions act in the belt?How is the centrifugal tension and the bending stress...

### Optimum belt speed

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This article provides answers to the following questions, among others: How is the transmitted power of belt drives determined?What influence does centrifugal force have on the...

### Bearing force

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This article provides answers to the following questions, among others: How is the bearing force of belt drives calculated?What is the maximum bearing force for a...

### Basics of power transmission

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This article provides answers to the following questions, among others: What does the belt friction equation state?Under what conditions does the belt friction equation only apply?Why...

### Bevel gears

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This article provides answers to the following questions, among others: How are bevel gears constructed?What are the advantages of bevel gears compared to cylindrical gears?What is...

### Worms and worm gears

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This article provides answers to the following questions, among others: How are worm drives designed?What types of worms and worm gears exist?How is the transmission ratio...

### Cylindrical gears

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This article provides answers to the following questions, among others: What are the pro and cons of internal gears compared to external gears? What are spur...

### Lubrication

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This article provides answers to the following questions, among others: Why are steel gears often surface-hardened? What types of lubricants are frequently used? Why do lubricants...

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