Grinding machine Traditional techniques that support high-precision machining

Traditional techniques that support high-precision machining

Traditional "kisage" technique

Kisage, or hand scraping, can attain a level of flatness beyond what machining can provide.
Kisage is used to make all major mechanical components exceedingly flat, delivering high-precision machining over long periods of time.

Traditional kisage technique

What is “Kisage”

It is possible to maintain the accuracy of the joint over the long term.

Maintaining precision of fastening parts

Maintaining precision of fastening parts

against each other. Stress on the surface, however, causes deformation, which will gradually degrade initial precision. Kisage, also known as hand scraping,makes it possible to heighten flatness so components meet flush without forcing, ensuring long-lasting precision.

Maintaining precision of fastening parts
Bolts can be torqued to force surfaces to meet flusheven if they are not perfectly flat.Over time, however, this causes distortion.
Kisage processing
Maintaining precision of fastening parts
Kisage processing on mating surfaces of fastening components allows them to be secured without stress, which ensures low dimensional change over even long periods of time.

Improved precision on sliding surfaces, lubricating and protecting

Operating precision on sliding surfaces is critical in machine tools. The smoother the surface, the higher the precision, but the wringing phenomenon※ can cause the surfaces to seize to each other.
Kisage is used to adjust smoothness to create depressions where lubricants can pool. The enhanced lubrication prevents seizing, lubricating and protecting sliding surfaces.

Improved precision on sliding surfaces, lubricating and protecting
Both machine bases are very smooth, and lubricant causes wringing. The two surfaces are too closely in contact with each other
Improved precision on sliding surfaces, lubricating and protecting
Kisage creates tiny depressions on the surface, allowing lubricant to pool.
Improved precision on sliding surfaces, lubricating and protecting
Kisage processing of machine tool base B provides the requisite smoothness. Depressions for lubricants assist in lubricating and protecting the surface.
  • *Wringing : When two mated surfaces are excessively smooth, they can seize and become difficult to separate from each other again.

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