Flute Lead Error

Flute Lead Error

The effects and causes of hob flute lead error. In previous issues, we looked at several types of hob errors: flute spacing error, rake error, and runout. Another important type of error can be found in the lead of the flute, also known as the gash. Flute lead error...
Gear Tooth Tip Profile Error

Gear Tooth Tip Profile Error

Hobs mounted without precision. Consider the following two gear tooth profile inspection charts (these have been simplified for illustrative purposes from what one would see in practice):     Inspection charts such as these plot the geometric variance normal...
Lead Variation, Wobble

Lead Variation, Wobble

Gear tooth lead variation caused by wobble. In this issue we will consider the problem shown in the following gear tooth lead inspection chart (Figure 1). This chart is a measurement along both the left and right flanks of four teeth of a gear. This is an...