How to Choose a Milling Gear Cutter & Buy One - Milling a Gear 3 

We’re showing you how to choose a gear cutter for making gears on a mill. Use the following key parameters: Pitch or Module, Pressure Angle and Tooth Count for the gear you plan to make, then use the involute gear cutter to mill a gear in your ... bit.ly/3onfQon
own shop.
In this video we go through these parameters in detail so you can find an involute cutter for
milling a gear. Find, select and purchase here: bit.ly/3qjtko4
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Involute Gear Cutter Chart & the Gear Cutter Size Guide:
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Designing or reverse engineering a gear? See our suite of online calculators that help with gear design, measurement, and making:
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Use this link to find our calculators to aid in gear design and measurement:
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Chapters
0:00 Intro
0:11 The Answer
0:35 Gear Cutter Chart
0:57 Gear Cutter set of 8 Compared
1:59 Disc Cutter Markings Decoded
2:38 Comparison of Disc Cutter to a Hob
3:00 Science Diagram of Cutter Nomenclature
4:01 Pressure Angle
5:14 Gear Gages and Reverse Engineering
6:07 Milling a Gear with a Bridgeport and an Ellis Dividing Head
6:33 Depth of Cut
6:57 Buying a Gear Cutter
7:55 Hob and Cutter Manufacturers
8:22 Undercut
9:09 Milling a Gear with a CNC Haas and a 5C Indexer
Depth of Cut
Use our calculator for Gear Dimensions to get all the critical dimensions for your gear
Here is the output from the calculator as an example
* Inputs
* Number of Teeth: 66
* Diametral Pitch: 16
* Pressure Angle: 14.5 degrees
* Gear Type: External
* Outputs
* OD Reference: 107.9500 mm 4.2500 in
* Pitch Diameter: 104.7750 mm 4.1250 in
* Root Diameter: 100.8062 mm 3.9688 in
* Addendum: 1.5875 mm 0.0625 in
* Dedendum: 1.9844 mm 0.0781 in
* Working Depth: 3.1750 mm 0.1250 in (Depth of cut is greater than this)
* Whole Depth: 3.5719 mm 0.1406 in (Depth of cut is EQ or less than this)
* Circular Pitch: 4.9873 mm 0.1963 in
* © 2021 Evolvent Design, 20-Mar-2022
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The devil is in the details. Machineries Definitions
D = Working Depth
f = Clearance
D+f = Depth of Cut
But different manufacturers can define clearance differently. Use what is marked on the tool, if not available revert to asking the OEM or using Whole Depth
We are rooted in the internationally used standards set by AGMA. For this work we used
AGMA ANSI/AGMA 1012-G05
To check your gear when it is done, use the Measurement over Pins (Wires) calculator to make sure you have the pitch circle and tooth thickness you want.
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References and Credit:
Stephen P. Radzevich, 2017, "Gear Cutting Tools - Science and Engineering", 2nd edition
CRC Press
amzn.to/3iylum8
This is a very comprehensive book and dives into the math behind gear cutting tools. A technical joy, plan on rolling up your sleeves.
Music: "Loso Solo"
Jonathon McEuen
His excellent guitar mastery is honed over many years. He wrote this just for the channel along with a few others. I am blessed to have friends with many different talents, and Jonathon definitely knows his craft which gets right to the essence of the channel. Sharing the skill & craft.
The history of gears is surprisingly interesting - the process of milling and hobbing gears plus the transmission of torque and movement all find a place here. We will open the "Secret Gear Case" to YT as well through this channel - a personal mission.
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To learn about lubricants for your machines
oilviscositychart.com​
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Disclaimer:
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