Bickford-Cincinnati 11-inch Manual Bickford-Cincinnati Radial-Arm Drills with 11, 13, 15, 17 or 19-inch diameter columns. Operator's Instruction and Maintenance Manual with Parts as Photographic Plates. Manufacturers: Bickford-Cincinnati Models: 11-inch 13-inch 15-inch 17-inch 19-inch Contents: Operators Manual Parts Manual