HAND SCRAPING

TGA® True Geometric Accuracy®
Kitamura hand scrapes all mounted surfaces requiring assembly in order to provide the full surface contact and proper alignment that exceeds the fit and finish of mounting surfaces when machined. This labor intensive process ensures accuracy, long-term reliability and peak performance. True Geometric Accuracy® means Kitamura Mycenters® never use geometry compensation in manufacture to adjust squareness, parallelism or perpendicularity, only the “hands-on” craftsmanship and attention to detail that truly makes Kitamura the Premier Machining Center.
  • Kitamura Features. HAND SCRAPING  1
    First, a tinted paste is applied to the bed casting or other contact surfaces of the machine tool during assembly.
  • Kitamura Features. HAND SCRAPING  2
    Secondly, a stretch (or perfectly flat tool) is passed over areas highlighted by the tinted paste allowing the engineer to see any areas that may not be even or level.
  • Kitamura Features. HAND SCRAPING  3
    Blue tinted marks are visible from the paste and represent the areas that need to be hand-scraped and properly fit to ensure geometric alignment of the machine tool.
  • Kitamura Features. HAND SCRAPING  4
    The hand-scraping process is labor intensive and must be performed by skilled craftsman who are trained in the technique. Machine components must be placed then removed up to 5 times to confirm that the machine base is both level and square.
  • Kitamura Features. HAND SCRAPING  5
    Kitamura currently has over 100 assembly engineers who are certified in hand scraping techniques. Shown above is a completed bed casting of a vertical machining center to which the column will be placed.
  • Kitamura Features. HAND SCRAPING  6
    Hand-scraping and the hand fitting of components allow for true geometric tolerances and long machine tool life. Accuracies of up to 0.000040”/Full Stroke are able to be achieved as a result of this time honored tradition.
  • Kitamura Features. HAND SCRAPING  7
    For long machine tool life, and day-in, day-out accuracy & repeatability, construction counts.
  • Video