Once again, I end up having a tool with a non-typical fit of something. This
Panasonic EY3530 cordless saw was cheap/almost free (with 7.2 to 24V smart
charger), but the arbor size for the blades is 20mm (.7874").
The Panasonic blades are some of the most expensive blades in the 5-3/8"
size.

Quite a few other 5-3/8" blades for other brands have arbor holes of 10mm,
so I'm pondering the likelyhood of enlarging the holes to 20mm, while having
the holes remain concentric.

In the past, I've considered trying to ream blade arbor holes, and that may
be good enough (for wood), but lately I wonder if a slight inacurracy might
cause rapid blade wear, particularly when cutting metal.

I expect the saw blade core to be relatively easy to cut, and I could grind
to the finished size if needed.

Clamping to a lathe faceplate, or to a rotary table, while indexing on the
original hole to center the blade, are the conlusions I've arrived at.

The blade tips are carbide for both metal and wood cutting blades, so
shimming away from a flat surface would preserve flatness.

I suppose that it's fairly safe to assume that other holes in the blades are
probably concentrically located to the arbor hole, but some blades don't
have additional holes.

--
WB
..........
metalworking projects
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