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Making a tool for clocks...like squaring a stem for a watch BUT MUCH LARGER


LittleWatchShop

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I am modifying a Webster-style mainspring winder to accept the standard winding keys (shafts).

To do that, I ordered an 8mm steel rod and had to grind a square on the end...much like what you would do making a stem.

I have a nice tool to do this on my lathe (filing rest and reference disc), but whoa...this will not fit on my lath.

So, I had this idea to print a square block and mount it on the rod and use that for aligning the rod at 90 degrees while grinding.

It is a great idea...but...even though printed a super tight fit square and pressed it on to the rod...once it got hot, I lost the tight fit.  Fortunately, before that happened, I got a pretty good reference cut.  I finished with a file and the appropriate elbow grease.

I know that I might have an issue with heat, but I took a chance.  This is still a good idea...just needs refinement.  Next time, I can put a threaded insert on the block and fasten it to the rid with a set screw.

Anyway...good enough for now.

The first image is my attempt without any guide on the grinder.  Pretty sloppy.  Those indents were added later.  The second picture shows the block for squaring.  The third picture is my improved result.  The fourth picture shows the attached coupler.

2022-04-21 11_10_37-20220421_110652.jpg ‎- Photos.png

2022-04-21 11_10_19-20220421_110703.jpg ‎- Photos.png

2022-04-21 11_10_04-20220421_110714.jpg ‎- Photos.png

2022-04-21 11_19_16-20220421_110900.jpg ‎- Photos.png

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