I used to do them with a hole saw. It used to go like this.

Grab sheet and drill 1/2 way thru with hole saw.
Turn over and drill from other side because the hole saw spelches the Tufnol if you go thru in one pass and wrecks the blank
Put each blank in lathe one at a time and bore centre hole to -0.00 +0.02
Mount 10 blanks on a mandrel and turn to OD.

Transfer to gear hobber.

Now it goes.

Screw cut sheet to router table.
Press go.
Go have tea
Come back and remove sheet,
Cut tabs with Stanley knife

Transfer to gear hobber