BUILDING A

METRIC MINNIE

Part 19 by Franco Pucci

More bits and pieces

Attempt 1 at making the worm gear for the steering - epic fail!



Attempt 2 for the steering worm - another fail…


Attempts 3 to 5 - all failed.


Eventually, I decided to make a tool to hog out a worm wheel. Never done one before so that is why it took me so long to attempt this method. I cut an ACME thread on the tool and same thread on the brass worm gear blank.


Cutting the teeth.


The completed tool prior to hardening. I put a little relief on the back of the cutting surface with a file.


And the (final) attempt. I first cut some teeth on the worm wheel using an indexer and tried to get as close to the correct angle as I could.


And the final result was very satisfying!


I made this awesome jig for holding small parts and drilling holes in shafts (centrally) and it was a worthwhile investment in time. See the Clickspring Youtube channel if you want plans.


Part one here  Part two  Part three  Part four  Part five  Part six  Part seven  Part eight 

Part nine  Part 10   Part 11  Part 12  Part 13  Part 14  Part 15  Part 16  Part 17  Part 18 Part 19 Part 20  Part 21