An offset shaft bearing assembly (100, 200) for a downhole tool comprising: an outer housing (101, 201), the outer housing (101, 201) having a housing centerline; a drive shaft, the drive shaft extending through the outer housing (101 201), the drive shaft being generally tubular and having a shaft centerline; and two or more radiused conical bearings (111a, 111b, 211a, 211b) positioned to couple the drive shaft to the outer housing (101, 201), each radiused conical bearing (111a, 111b, 211a, 211b) having: an outer surface (123, 123'), the outer surface (123, 123') being generally cylindrical, wherein the outer surface (123, 123') is coupled to the outer housing (101, 201) and aligned with the housing centerline; an inner surface (125, 125'), the inner surface (125, 125') being generally cylindrical, wherein the inner surface (125, 125') is coupled to the drive shaft and aligned with the shaft centerline such that the inner surface (125, 125') and outer surface (123, 123') are concentric a first bearing surface (117, 119), the first bearing surface (117, 119) coupled to the outer surface (123, 123') of the radiused conical bearing (111a, 111b, 211a, 211b); and a second bearing surface (117, 119), the second bearing surface (117, 119) coupled to the inner surface (125, 125') of the radiused conical bearing (111a, 111b, 211a, 211b), the bearing surfaces (117, 119) radiused such that the bearing surfaces (117, 119) remain in contact despite angular misalignment between the outer surface (123, 123') and the inner surface (125, 125'); characterised in that the inner surface (125, 125') of at least one radiused conical bearing (111a, 111b, 211a, 211b) is offset from the housing centerline in a direction perpendicular to the housing centerline such that the shaft centerline is at an angle to the housing centerline. an outer housing (101, 201), the outer housing (101, 201) having a housing centerline; a drive shaft, the drive shaft extending through the outer housing (101 201), the drive shaft being generally tubular and having a shaft centerline; and two or more radiused conical bearings (111a, 111b, 211a, 211b) positioned to couple the drive shaft to the outer housing (101, 201), each radiused conical bearing (111a, 111b, 211a, 211b) having: an outer surface (123, 123'), the outer surface (123, 123') being generally cylindrical, wherein the outer surface (123, 123') is coupled to the outer housing (101, 201) and aligned with the housing centerline; an inner surface (125, 125'), the inner surface (125, 125') being generally cylindrical, wherein the inner surface (125, 125') is coupled to the drive shaft and aligned with the shaft centerline such that the inner surface (125, 125') and outer surface (123, 123') are concentric a first bearing surface (117, 119), the first bearing surface (117, 119) coupled to the outer surface (123, 123') of the radiused conical bearing (111a, 111b, 211a, 211b); and a second bearing surface (117, 119), the second bearing surface (117, 119) coupled to the inner surface (125, 125') of the radiused conical bearing (111a, 111b, 211a, 211b), the bearing surfaces (117, 119) radiused such that the bearing surfaces (117, 119) remain in contact despite angular misalignment between the outer surface (123, 123') and the inner surface (125, 125'); an outer surface (123, 123'), the outer surface (123, 123') being generally cylindrical, wherein the outer surface (123, 123') is coupled to the outer housing (101, 201) and aligned with the housing centerline; an inner surface (125, 125'), the inner surface (125, 125') being generally cylindrical, wherein the inner surface (125, 125') is coupled to the drive shaft and aligned with the shaft centerline such that the inner surface (125, 125') and outer surface (123, 123') are concentric a first bearing surface (117, 119), the first bearing surface (117, 119) coupled to the outer surface (123, 123') of the radiused conical bearing (111a, 111b, 211a, 211b); and a second bearing surface (117, 119), the second bearing surface (117, 119) coupled to the inner surface (125, 125') of the radiused conical bearing (111a, 111b, 211a, 211b), the bearing surfaces (117, 119) radiused such that the bearing surfaces (117, 119) remain in contact despite angular misalignment between the outer surface (123, 123') and the inner surface (125, 125'); characterised in that the inner surface (125, 125') of at least one radiused conical bearing (111a, 111b, 211a, 211b) is offset from the housing centerline in a direction perpendicular to the housing centerline such that the shaft centerline is at an angle to the housing centerline.