Revision as of 00:48, 29 March 2021

Grinding Exterior Keyway

Use cutoff grindger wheel and guide, then use a dremel to clean up:

Brute force with grinder:

Summary of grinder route:

Use cutoff grinder wheel with guide to make the sides. Use a guide clamped on the shaft. This provides the straight, vertical edge
Use a larger grinder wheel to bore out between the sides.

For 2" or larger: doesn't really exist.

Use a reciprocating broach, or parting tool blade if you don't have a broach

Simply mount a needle file on a Universal Axis - based reciprocator, and let it CNC all night long to make a perfect keyway very slowly. With 10 micron step size, this should not be a problem. Working out functional parameters would be a good project for a student. Needle files: [2]
The above is inspired by this:

Can we find a tiny angle drill?
Harbor Freight 3/8" drill attach. If take off right angle chuck, may have a way to mount grinding disc. [3]

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+=Angle Drill=
+*Can we find a tiny angle drill?
+*Harbor Freight 3/8" drill attach. If take off right angle chuck, may have a way to mount grinding disc. [https://www.harborfreight.com/38-in-90-angle-drill-attachment-69337.html?cid=paid_google|||69337&utm_source=google&utm_medium=cpc&utm_campaign=&utm_content=&gclid=Cj0KCQjw0oCDBhCPARIsAII3C_Gpg5ar4MtAY7f8e1BtbKmB6cNRpLoe5Il3XOuCecutQ_8K-brFvNwaAoHvEALw_wcB]