Butternuts (White Walnuts) are my favorite.
Couple gallons of nuts in 5 gal bucket with water to cover ,
Set untill hulls darken. (couple days at most)
Paint mixer on a cordless drill.
3-4 minutes of stirring and they are Hulled.
Anyone who has seen the shell of a Butterrnut will see why its so fast and easy.
Toss any floaters away.
To crack;
Leather glove and hold "longways" in a good vice.
( I cup the nut to contain any that may gernade)
I tighten until i hear the crack, and then slightly more to hear a light crunch.
Bigger pieces left, are then opened with Dykes, if needed.
I do several bushels every fall.
Larger pieces are turned into a "Maple Glazed Nuts" .
My Moms old recipie, for friends and family at Christmas.
Smaller pieces are for adding to cakes , fudge . ect.
Good Homade Walnut crackers all over youtube.
This one looks interesting for DIY I deas.
Homemade Nut CRacker