The importance of contact ratios

It is expected that when we flip the switch on a device that it will power up and some motion will occur. In the...

Addendum modification and undercut

When you walk onto the sales floor in any furniture store, you are greeted by a smiling, courteous, friendly sales associate. Their job is...

Does all learning happen in a classroom?

Learning takes many forms. Some methods are formal in their approach, such as elementary school and high school. Others, like mentoring, take a more...

How does shaft alignment and speed ratio affect my design?

The motto for the Olympics is “Citius, Altius, Fortius,” which translates to “Faster, Higher, Stronger.” The phrase is also the mantra for most modern...

Heat treating carbon and alloy steels

When considering a material for a gear design, the most significant decision is the ease of machinability vs. the durability of the material. Most...

Are your gears compliant?

The concept of clean living has been around for a long time, but it wasn’t until recently that it became the movement that it...

What, precisely, is my gear made of?

The building blocks for all materials are microstructures known as atoms. Whether the material in question is a plastic, a metal, or even your...

Precision gearing: Accuracy and tolerances

When I was a child, one of the great joys of going on the family vacation was to pull out a paper map and...

Determining tooth thickness of various gear types – Part III

In order to determine the tooth size of a gear after taking into account the backlash allowance, you first must determine what the nominal...

Determining tooth thickness of various gear types – Part II

In order to determine the tooth size of a gear after taking into account the backlash allowance, you first must determine what the nominal...

Determining tooth thickness of various gear types

In order to determine the tooth size of a gear after taking into account the backlash allowance, you first must determine what the nominal...

What is a standard anyway?

There is an old adage that goes: “Everything old is new again.” This is commonly used when a fad — like bell-bottom blue jeans...

Understanding dimensional stability in gearing

In the retail community, the term shrinkage is defined as the difference between the value of the physical on-hand inventory minus the expected on-hand...

Crossed helical gearing a.k.a. screw gears

A common refrain from my childhood was “if you keep crossing your eyes, they are going to get stuck like that!” It never did...

Internal ring gears – design and considerations 

When one is under a great deal of stress, they have a choice to either internalize the stress or to express it. Some express...

Gear mesh and tooth modifications 

As we march through this thing that we all call life, we look to find our perfect partner — that singular person that perfectly...

What is a gear engineer?

When you are a young person, perhaps 4 or 5 years old, someone might ask, “What would you like to be when you grow...

What do you do? I sell gears!

This year, my 11-year-old daughter asked me to be one of the parents who presented their profession on career day. She is very proud...

Standards in terminology for bevel gearing

If you still are digesting the acronyms in my April 2019 column, I apologize. As mentioned in that article, without a proper understanding of...

I graduated; now I am an engineer!?!

In my previous columns, I tried to connect real-world experiences with concepts of gearing in order to entertain and educate you, the reader. In...
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