Here's a usefull accessory that will help you adjust out crankshaft endplay and get your magneto gap up to spec.
I've got that one too. Great to see the actual box and instructions.
I have always felt that this sort of device and its clones were really a valid belts AND suspenders approach to keeping the magneto gap in a good solid place! I've looked over many from the eccentric locating stud shown here, to those with wedges...but never went and tried one.
Curious Jay...perhaps you can elaborate...in the upper left hand picture, the babbit sure appears to be wallowed out at an angle! Would be curious as to why. Perhaps an eccentric pin does OK front to back, but leaves side to side a little too free?
George, the unit is NOS never used. The long edges of the babbit are chamfered at an angle. I would say it's to let oil in.
aha....oil groove makes sense
There were two versions of this accessory,
as shown and described in the following patents
Patent number: 1421518
Filing date: Jan 7, 1921
Issue date: Jul 1922
Patent number: 1761139
Filing date: Nov 19, 1927
Issue date: Jun 3, 1930