Related Glossary Terms
- computer numerical control ( CNC)
computer numerical control ( CNC)
Microprocessor-based controller dedicated to a machine tool that permits the creation or modification of parts. Programmed numerical control activates the machine’s servos and spindle drives and controls the various machining operations. See DNC, direct numerical control; NC, numerical control.
- flat ( screw flat)
flat ( screw flat)
Flat surface machined into the shank of a cutting tool for enhanced holding of the tool.
Hand scraping mating surfaces on CNC machine tools helps maintain high levels of machining accuracy and reduces wear and tear, resulting in a long, stable and productive life for the machine, as detailed in a new white paper from machine tool builder Okuma America Inc., Charlotte, N.C.
This manual process ensures that tight tolerances are consistently maintained and that precision CNC machining performance is sustained for years, yielding the lowest cost-per-part.
Every Okuma CNC machine is hand scraped on each mating surface to set the foundation for consistent accuracy and long-term stability. Hand scraping assures the proper mating of two or more surfaces, creating a custom flat surface. For components that traverse a way surface, tighter tolerances can only be achieved by hand scraping. Hand scraping creates pockets that hold lubrication, resulting in less friction between the two mating surfaces.
Okuma's hand scraping professionals utilize several special tools in a variety of motions. Hand pushing, "body power strokes," and curved scraping maximize the efficiency of the machine tool's operation. Hand scraping is a highly skilled art and is essential to creating a solid, efficient machine tool foundation, according to Okuma.
Okuma America's Hand Scraping white paper is available for complimentary download at here. You can also view a hand scraping video demonstration here. For more information on Okuma machine tools visit www.okuma.com.