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- The following are links to gears and their application, equations and other design data.
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- AGMA Fine Pitch Tolerances for Gears Gear tolerance chart below, lists the more common tolerance or quality specifications assigned for Spur, Helical and Herringbone type gears.
- Centrifugal Force Calculations of Rotating Body When gear rotates about any axis other than one at its center of mass, it exerts an outward radial force called centrifugal force.
- Critical Scuffing Temperature for Gears For a given mineral oil without anti-scuffing or extreme pressure additives, there is a critical scuffing temperature that is constant regardless of operating conditions.
- Engineering and Applications Factor of Safety Review Factor of Safety (FOS) for structural applications is the ratio of the allowable working unit stress, allowable stress or working stress.
- Gear Design and Application Summary And Evaluation Of Gear Applications for engineering and design.
- Gear Pitch Conversions The following charts convert gear pitch dimensional data to the following:
- Gear and Tooth Component Illustration A gear or cogwheel is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part in order to transmit torque.
- Gear Equations, Calculators and Formula Spur Gear design formula for geometry, pitch, tooth clearance and critical functional data.
- Gear Material Steels for Industrial Gearing Gear engineering materials are typical steel used within industrial applications.
- Gear Terminology and Definitions Backlash is the amount by which the width of a tooth space exceeds the thickness of the engaging tooth on the pitch circles.
- Gears Lubrication General Gear lubricants are formulated and applied to prevent premature component failure, assure reliable operation, reduce operating cost, and increase service life.
- Gear Type and Overview Spur Gears, Rack and Pinion Gears, Internal Ring Gears, Helical Gears, Helical rack Gears, Face Gears, Worm Gears, Double Enveloping GEars, Hypoid Gears, Straight Bevel Gears, Spiral Bevel Gears, Screw Gears
- Gears Wear, Failure and Lubrication The most critical function provided by gears lubricants is to minimize friction and wear to extend equipment service life.
- Gear Pitting and Lubrication Pitting occurs when fatigue cracks are initiated on the tooth surface or just below the surface.
- Gear Lubricant Characteristics and Viscosity Gear lubricant must possess the following characteristics:
- Gear Scuffing Wear Gear scuffing can occur when there is substantial sliding between a lubricated rolling contact
- Gear Tooth Strength Calculation and Equation Design guidelines for determining or estimating your required gear tooth strength.
- Gear Wear, Adhesion and Guidelines The amount of gear wear that is acceptable depends on the expected life, noise, and vibration of the gear units.
- Gear Wear and Abrasion Adhesive wear can be found between gear tooth surfaces during frictional contact.
- Gearbox Design and Application Overview Regardless of the initial conceptualization approach, engineering and design must identify the gearbox application, gear configurations / type and packaging requirements.
- Helical Gear and Pinion Calculator and Equations This calculator will determine the following design variables for a gear and pinion.
- Keyway Cutter Hole Keyway Dimensional Data - ANSI/ASME B94.19-1997 American National Standard Keys and Keyways for Milling Cutters and Arbors
- Design of Square Key and Keyway Equations and Calculator
- Inspection Techniques for Spur Gears There are several methods used within industry to perform dimensional conformance inspection on spur gears.
- Involute Spline Engineering Drawing Data When defining engineering design data on an engineering drawing for involute splines, uniform and consistent specifications.
- Involute Spline per ANSI B92.1 Equations These splines or multiple keys are similar in form to internal and external involute gears.
- Involute Spline and Serration Universal Design Calculator Involute Spline and Serration Design Calculator for the following engineering standards:
- Involute Gear Design Equations and Calculator Equations and engineering design calculator to determine critical design dimensions and features for an involute gear
- Lewis Factor Equation Lewis factor Equation is derived by treating the tooth as a simple cantilever and with tooth contact occurring at the tip as shown above.
- Micropitting and Gear Lubrication Micropitting occurs on surface-hardened gears and is characterized by extremely small pits approximately.
- Polishing Wear of Gears Polishing wear is characterized by a mirror-like finish of the gear teeth
- Gear Ratio Equations and Calculators of Planetary or Epicyclic Gear Assemblies Gear Ratio Equations and Calculators
- Roller Chains Review Roller chains are used to transmit mechanical energy between sprockets in power transmission applications.
- Screw Gear Axial Force Calculation Axial thrust or load applied per the applied on a screw (worm gear) thread calculate the axial thrust of a nut.
- Shaft Arbor and Keyseat Dimensional Data - ANSI/ASME B94.19 E & F Standard Keys and Keyways for Milling Cutters and Arbors ANSI/ASME B94.19 Shaft and Arbor Class E and F
- Shaft (Arbor) Keyway Dimensional Data - ANSI/ASME B94.19 A & B Standard Keys and Keyways for Milling Cutters and Arbors ANSI/ASME B94.19 Shaft and Arbor Class A and B
- Specifying AGMA Bevel Gear, and Hypoid Gear Backlash Specifying mating gears backlash and tolerances, is determined by the operating velocity, lubrication, modes of operation and loading imposed on the mating gears.
- Specifying AGMA Spur Gear, Helical Gear, and Herringbone Gear Backlash When specifying tolerances to control backlash, care should be taken to ensure that excessive tight tolerances are not specified.
- Splined Gears Preferred Number of Teeth 6mm to 58mm
- Modules, reference diameters and numbers of teeth for splined gear shaft and diameters.
- Splined Gears Preferred Number of Teeth 60mm to 500mm Modules, reference diameters and numbers of teeth for splined gear shaft and diameters.
- Spline Engineering Design Formula ISO 5480standard applies to splined connections with involute splines based on reference diameters for connecting hubs and shafts..
- Spline Gear Specifications on Engineering Drawings Geometrical data for spline gear teeth are too extensive to specified directly on the engineering drawing as dimensions.
- Spur and Helical Gear Mechanical Drawing Specifications Requirements Defining a gear for manufacturing, or procurement requires engineering and manufacturing information.
- Spur Gear Train Backlash Review Spur gear backlash is the amount of tooth space between mating gears at the pitch circle diameter.
- Worm Gear Formula Table Worm gears are grouped into two general classes, fine-pitch worm gearing, and coarse-pitch worm gearing.
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