Filling Some Gaps in Spline Design Guidelines: Centering, Friction, and Misalignment
Editor's note: At the author's request, some statements have been removed for clarity since the article was originally published in October, 2019.
International spline standards such...
Application of Finite Element Analysis for the Strain Wave Gear Tooth Surfaces Design and Modification
This paper represents the application of finite element analysis for the strain wave gear with modified conjugate tooth surfaces. The unmodified tooth profile is...
Methods to Determine Form Diameter on Hobbed External Involute Gears
In custom designs of external spur or helical gears, designers generally prefer a lower form diameter for greater transverse contact ratio. A larger root...
Design features of worm gearing composed of plastic and/or powder-metal components
This article deals with worm gearings in cases when the worm-gear pair is composed either of plastic or of powder-metal made components. The technology...
Taking deburring to the next level
Once a gear is created, deburring becomes a necessary step to ensure a gear’s accuracy. Traditionally, deburring has been done by hand, but that...
Lean Heat Treatment for Distortion Control
Controlling distortion is of key importance during the case hardening process for the production of gear components. By effective control of distortion and the...
Inspection & Metrology: ‘We must never stand still’
Small series and prototype production at ZF Friedrichshafen AG create new challenges for quality control time and again: measurement programs for new components need...
Tooling & Workholding: Making Out-of-Round Parts Round
One of the most vexing problems in machining today is how to most efficiently make an out-of-round part round. In the days of thick-walled...
Tooling Workholding: A new solution for bevel gears
The creativity of the designers knows no bounds with new drive element and gear geometries. Faced with constantly increasing demands from a wide variety...
Is anyone printing gears using metal additive manufacturing?
The AGMA Emerging Technology Committee wanted to look at additive manufacturing through the lens of the goal of the committee: “Identify, investigate, and inform...
Online exclusive: How many mils is your coating?
Instantaneous handheld coating thickness gauges that can be operated by virtually any technician deliver lab-quality readings even on curved and complex surfaces like gears.
From...
Tooling & Workholding: A success story: Low-deformation workpiece clamping
Those who want to turn, mill, or grind rings, flanges, housings, or other thin-walled parts will quickly reach the limits of what is possible...
Two-Probe Pitch Inspection Method For Large Gears
A gear’s pitch (a k a index or spacing) accuracy is one of the most fundamental gear characteristics affecting its performance. Pitch errors affect...
Chamfer Hobbing, Perfect Timing
New gearbox developments, particularly for eDrives, are creating a whole new set of gear design and manufacturing criteria. Compact gearbox design is paramount, and...
Residual Stresses in Case Hardened Steel Gears
Aerospace gear components are required to demonstrate excellent load-carrying and endurance characteristics. Case-hardened steels are often used for these parts. During the manufacturing process...
Choosing the proper grinding wheel
Methods of gear grinding have changed over the years. As manufacturing standards get tighter, the right machines and abrasives needed to meet specifications have...
Why are Today’s Hypoids the Perfect Crossed-Axes Gear Pairs?
In 1924, Ernest Wildhaber, a well-known gear scientist, invented hypoid gearing. Compared to spiral bevel gears, hypoid gears provide an offset that allows lowering...
Increasing Static Friction with Laser
Flat and curved surfaces with functionality of high static friction are increasingly needed for force-fitted nonslip power transmissions. The motivation is driven by the...
Hydraulic workholding takes hold
In the brave new world of smart factories, Internet 4.0 and highly automated machines and cells, workholding rarely gets top billing. It’s surprising that...
Still Stuck with Hand Deburring?
No blueprint ever revealed, nor engineer ever designed, a part with burrs. It is only after a process is selected for making a part...
