AGMA 06FTM04 - Precision Planetary Servo Gearheads
October 1, 2006 - AGMA

Automated machines use servomotors to perform complex motions. Planetary gearheads are frequently used in conjunction with servomotors to match the inertias, lower the speed, boost the torque, and at the same time provide a mechanical interface for pulleys, cams, drums and other mechanical...

AGMA 940 - Double Helical Epicyclic Gear Units
January 6, 2009 - AGMA

This information sheet addresses epicyclic gear drives which utilize double helical type gearing on the planetary elements. It is intended to be a supplement to and used in conjunction with ANSI/AGMA 6123--B06, Design Manual for Enclosed Epicyclic Gear Dives. It...

Planetary Geology: An introduction
January 1, 2013 - DUNEDIN

In a dynamic treatment of planets of the Solar System from a unified perspective Planetary Geology deals with the origin of planetary bodies, the forces that fashion their surfaces, the rise and fall of icecaps and oceans, and the role of life in planetary history.

DSF/PREN 16604-20 - Space sustainability – Planetary protection

This standard contains planetary protection requirements, including: - Planetary protection management requirements; - Technical planetary protection requirements for robotic and human missions (forward and backward contamination); - Planetary protection requirements...

AGMA 13FTM08 - Application and Improvement of Face Load Factor Determination Based on AGMA 927
September 1, 2013 - AGMA

The face load factor KHβ, which in rating equations represents the load distribution over the common face width in meshing gears, is one of the most important items for a gear strength calculation. In the international standard for cylindrical gear rating, the ISO 6336-1 [1],...

AGMA 06FTM03 - Detailed Procedure for the Optimum Design of an Epicyclic Transmission Using Plastic Gears
October 1, 2006 - AGMA

This paper shows all the steps suggested to get an optimum (volume based) design for an epicyclic (planetary) transmission using plastic materials. The design was developed using the tooth proportions proposed in ANSI/AGMA 1006-A97, Tooth Proportions for Plastic Gears and...

AGMA 95FTM10 - Efficiency of High Contact Ratio Planetary Gear Trains
October 1, 1995 - AGMA

A new method is described for calculating the efficiency of planetary gear trains. An example, showing how the method can be applied to the case of a fixed differential gear train is given.

AGMA 08FTM07 - Planetary Gearset Lubrication Requirement Estimation Based on Heat Generation
October 1, 2008 - AGMA

A planetary gearset is composed of sun gear, planet gears, ring gear, carrier and bearings. As the gearset is in motion under torque, heat is generated at all sliding and rolling contacts for gear meshes and bearing surfaces as lubricant is supplied. Without...

SAE J646 - (R) Planetary Gears - Terminology
July 1, 2018 - SAE

Figures 1 through 5 illustrate in simplified form some of the more common planetary gear arrangements in order to establish applicable terminology. Figures 6 and 7 provide additional examples that use elements of those gear arrangements. Gear ratio is the numerical ratio...

Planetary Geodesy and Remote Sensing
October 22, 2014 - CRC

Although lunar exploration began in the 1960s, the moon and other planets have many long-standing, unanswered questions about planetary environments, origin, formation and evolution, magnetization of crustal rocks, internal structure, and possible life. However, with the recent development...

AGMA 06FTM10 - Fabrication, Assembly and Test of a High Ratio, Ultra Safe, High Contact Ratio, Double Helical Planetary Transmission for Helicopter Applications
October 1, 2006 - AGMA

An ultra-safe, high ratio planetary transmission, for application as a helicopter main rotor final drive, has been designed, fabricated and tested. The transmission improvements are reduced weight, reduced noise and improved fail-safety and efficiency. This paper discusses the fabrication,...

AGMA 04FTM9 - Design of a High Ratio, Ultra Safe, High Contact Ratio, Double Helical Compound Planetary Transmission for Helicopter Applications
October 1, 2004 - AGMA

An ultra-safe, high ratio compound planetary transmission, for application as a helicopter main rotor drive, has been designed under the sponsorship of the National Rotorcraft Technology Center- Rotorcraft Industry Technology Association (NRTC/RITA). It is anticipated that this new...

AGMA 97FTM7 - Bending Load on Internal Gears of Planetary Gear Sets
November 1, 1997 - AGMA

As compared to external toothings, the design fundamentals and standards for proving the load-carrying capacity of internal toothings have been little developed. Mostly only insufficiently considered is the influence of stress in the toothed gear rim, which is essential in almost all cases....

AGMA 94FTM2 - Analytical Method for the Calculation of the Efficiency of Planetary Gears
October 1, 1994 - AGMA

This paper presents a synthesis of an analytical method for the calculation of the efficiency of simple or compound planetary gear atrains. It is based on fundamentals formulae. It is intended to improve the accuracy of the rating of the efficiency of pianetary gears to be...

An Introduction to Planetary Atmospheres
September 7, 2010 - CRC

Planetary atmospheres is a relatively new, interdisciplinary subject that incorporates various areas of the physical and chemical sciences, including geophysics, geophysical fluid dynamics, atmospheric science, astronomy, and astrophysics. Providing a much-needed resource for this...

AGMA 10FTM08 - Calculation of Load Distribution in Planetary Gears for an Effective Gear Design Process
October 1, 2010 - AGMA

The design of gears - especially planetary gears - can just be carried out by the consideration of influences of the whole drive train and the analysis of all relevant machine elements. In this case the gear is more than the sum of its machine elements. Relevant...

AGMA 14FTM20 - Influence of Central Members Radial Support Stiffness on Load Sharing Characteristics of Compound Planetary Gearsets
October 1, 2014 - AGMA

In this study, a non-linear dynamics model of Ravigneaux compound planetary gearsets which adopts the intermediate floating component is set up based on concentration parameter. By considering the position errors and eccentric errors, the dynamic load sharing factors of the gearsets are...

AGMA 11FTM19 - Convoloid Gearing Technology - The Shape Of The Future
October 1, 2011 - AGMA

Since the invention of the involute curve and the application thereof to gearing, the world has embraced and developed this type of gear tooth form to a very high degree of engineering and manufacturing excellence. Improvements in recent years have been relatively modest, since this...

AGMA 12FTM05 - Combined Effects of Gravity, Bending Moment, Bearing Clearance, and Input Torque on Wind Turbine Planetary Gear Load Sharing
October 1, 2012 - AGMA

This computational work investigates planetary gear load sharing of three­mount suspension wind turbine gearboxes. A three dimensional multi­body dynamic model is established, including gravity, bending moments, fluctuating mesh stiffness, nonlinear tooth contact, and bearing...

AGMA 13FTM07 - Finite Element Analysis of a Floating Planetary Ring Gear with External Splines
September 1, 2013 - AGMA

This study investigates the stresses and deflections of a floating ring gear with external splines working in a large planetary wheel motor of a mining truck. Such calculations carried out with conventional engineering approaches described in popular standards and textbooks are not...