Obsidian Manufacturing Industries Inc. Address 5015 28th Ave. Rockford IL 61109 United States Map It Phone 815-962-8700 Fax 815-398-0285 Website http://www.obsidianmfg.com Email info@obsidianmfg.com Product Categories Manufacturer Categories Chucks Grinding Machines Grinding Services Machine Tool Accessories Machine Tool Maintenance/Remanufacture Workholding