Husqvarna, Floor Grinder, PG 400, Single Phase, 220 Volt. SKU #: 118198 . Catalog #: 1618-1986 . Details . PG 400 is a versatile and very productive single disc floor grinder for a wide range of applications. With its 16 in. wide grinding width it efficiently grinds adhesives, paint, epoxy and spackle on medium to large concrete areas.