Securing gears on shafts

[DonRotolo]

Originally Posted by dlavery

Grinding a cutting tool to cut a retaining ring groove is a fundamental lathe skill that you will want to practice.

This is a point worth repeating. Just because you can buy pre-made lathe tools doesn't mean you cannot make your own. In fact, there are times when making your own provides a far superior result. Making your own lathe tools is not at all difficult, as long as you follow some basic rules, and having that skill will serve you very well throughout your life.

Pre-made tools are best used when you need something that will last a long time, such as for a production run or an operation you'll repeat many times (like cutting screw threads). For short sample runs - and in FIRST, is there anything else? - unless you happen to have the right tool, grind your own.

FIRST is here to help you learn these skills. Go at it!

Over the years I have forgotten the details of most tools, but I DO know where to look them up, and that's just as good. I have a good tool grinding attachment for my grinding wheel, allowing for decent precision, and with just a little understanding of the principles, you can eyeball something if necessary. Pre-made tools in my shop are limited to 3 carbide jobbies and a parting tool.

Remember, you can use an e-clip even in a square shaft* - it's the groove that needs to be round, not the outside of the shaft. (*not recommended, but possible anyway)

Don

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