spur gear, straight-cut toothing

Cylindrical gears

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...
pinion, bevel gear, gearbox

Bevel gears

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...
globoid worm drive, wheel

Worms and worm gears

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...
belt drive, pulley, drive, output, input, driving, driven

Basics

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.
belt drive, belt length, calculate, calculation, derivation, formula

Calculation of the belt length

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?
belt drive, power transmission, pulley, tight, slack side, wrap angle

Basics of power transmission

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...
belt drive, power transmission, torque, circumferential force, tight side, slack side

Power transmission of a belt drive

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...
belt drive, centrifugal force, derivation, formula, free body diagram, belt

Centrifugal forces

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...
belt drive, tension, stress, slack side, tight side, bending stress, pretension, preload force, centrifugal tension

Maximum belt stress

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...
belt drive, power, transmission, optimum belt speed, maximum power, diagram

Optimum belt speed

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...
belt drive, bearing force, calculation, tight side, slack side

Bearing force

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...
belt drive, slip, slippage, belt, elongation, shrinkage. stretching, shrinking

Slippage

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 drive, type, flat belt, tension cord, top, bottom, cover

Belt types

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...
planetary gear, planet gear, sun gear, ring gear, carrier

From stationary gear to planetary gear

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...
planetary gear, velocity, distribution, planet gear, carrier

Fundamental equation of planetary gears (Willis equation)

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?
carrier, planet gear, three-speed internal-gear hub

Three-speed gear hub

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...
Differential gear, how it works, bevel gear, bending, stress

Differential gear

This article provides answers to the following questions, among others: Why is a differential gear required to drive an automobile?How does a differential gear work?How is...
cycloidal drive, disc, roller pins, eccentric shaft, rolling bearing

Operating principle

This article provides answers to the following questions, among others: What is a cycloidal drive and how does it work?Why are two cycloidal discs often used?How...
cycloidal disc, construction, ordinary cycloid, rolling circle, base circle, equidistant

Construction of the cycloidal disc

This article provides answers to the following questions, among others: How is the shape of the cycloidal disc obtained?How is a cycloidal drive constructed?
involute, gear, toothing

Geometry of involute gears

This article provides answers to the following questions, among others: How is the shape of the tooth of an involute gear obtained?What is an involute? How is...
involute gear, meshing, line of action, base circle

Meshing of involute gears

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...
involute gear, rack, line of action, pitch point, pitch circle, standard, reference

Rack

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...
involute gear, cutting, manufacturing, hobbing, hob cutter

Gear cutting

This article provides answers to the following questions, among others: How are gears manufactured?What are the advantages and disadvantages of gear hobbing?What are the advantages of...
involute gear, undercut, hobbing

Undercut

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...
Gear, profile shift, comparison, profile shift coefficient, corrected gears

Profile shift

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...
gear, calculate, calculation, definition, involute function

Calculation of involute gears

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...
cycloidal gear, construction, hypo-cycloid, epi-cycloid, base circle, rolling circle

Geometry of cycloidal gears

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...
Cycloidal gears, law of gearing, contact point, normal, flank

Meshing of cycloidal gears

This article provides answers to the following questions, among others: How ist the line of contact formed for cycloidal gears?Why do cycloidal gears have less wear...
lantern pinion, cycloidal gear, construction, base circle, rolling circle, cycloid, pin, trundle

Lantern pinion

This article provides answers to the following questions, among others: What is a lantern pinion?How is a lantern pinion designed?What are lantern pinions used for?How...
roots type supercharger, blower, operating principle

Roots type blower

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...