ORTLIEB Lead Grinding Machines OBD52 and OSS52 and Die Grinder OBS. Detailed Operating Manual ORTLIEB Lead Grinding Machines OBD52 and OSS52 and Die Grinder OBS. Detailed Operating Manual and a Sales & Specification Catalogues. Manufacturers: Ortlieb Models: OBD52 OBD-52 OBD 52 OSS52 OSS-52 OSS 52 Contents: Operators Manual