Dec 18, 2015 | Tool Time
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...
Mar 10, 2014 | Tool Time
Identification, Measurement, and Correction of this Error. In Issue 2 of “As the Gear Turns,” we investigated the effects of hob rake error on the gear tooth profile. Rake error is only one of several possible factors leading to tooth profile errors. In this issue, we...
Dec 11, 2013 | Tool Time
The importance of hob rake. In order to produce high quality gears, it is important to use hobs of AGMA Class A or better. Equally important, these hobs must be properly sharpened in order to maintain the correct hob tooth geometry. Improper hob sharpening introduces...
Nov 12, 2013 | Tool Time
Hobs mounted without precision. Runout Error - Figure 1 Runout Error - Figure 2 Runout Error - Figure 3 The importance of using a precisely mounted hob is critical to achieve high quality gears. The machine cutter spindle and arbor support systems should run true...
