[ARC5] Bearings for DM-28 dynamotors

[AKLDGUY .]

> Note Mike's point about "brass".  The metal "hitter" should be softer
> than the "hitee" (i.e. the dyno shaft.)
> Don't hit steel with steel!  - Les

Good advice.
In my earlier days when I overhauled car engines and gearboxes,
the "hitter" was referred to as a drift. I see on Wikipedia that that's
the name for a hole alignment tool, and no mention is made of an
impulse inflicting tool.

Perhaps "drift" was a term unique to the UK/British Commonwealth
when used in that sense?

73 de Neil ZL1ANM