Delapena VHM-3M Manual Delapena VHM-3M Honing Machine. Instruction and Maintenance Manual with Electrical Schematic. Includes a copy of the booklet: "Delapena Recommended Honing Speeds & Honing Stone Pressures" Manufacturers: Delapena Models: 3M VHM VHM-3M Contents: Operators Manual Maintenance Manual Electrical Diagrams