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1. The Specification of the cutting edge.
The ROCKSTEAD BRAND knife has a mirror-like surface. The mirror surface processing is given along the sides and all the way to the edge.
This mirror-like blade edge provides toughness and durability.
We believe this method produces the finest possible cutting edge.
2. THE MIRROR SURFACE :
The blade of our knives is ground like the surface of a mirror. If you look at the edge of a normal knife blade in a microscope, it looks like the teeth of a saw. These saw teeth edges cause nick with normal usage.
The edge of the ROCKSTEAD blade is polished to the maximum, achieving both maximum sharpness and strength.
3. HARDNESS and TOUGHNESS :
We realized these extraordinary characteristics after developing a new tool steel and heat treatment: hardness: over HRc64 toughness(10R Charpy impact testing): 20J/cm2
4. COATING :
Coating aims at strengthening of the edge of a blade and the prevention of rust. This processing is normally used just on the cutting edges of metalworking tools.
DLC coating
coating thickness: 3 micron. hardness: Hv1700 (Vickers) color: black.
Titanium aluminum coating
coating thickness: 3 micron. hardness: Hv3000 (Vickers)
color: thin purple.
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The history of the ROCKSTEAD BRAND. |
Our company has 70 years history in the production of edged tools for agriculture and horticulture. Furthermore, we have made machine tools for edged tool production, and have achieved improvement in productivity and quality control. Sakai is famous for its traditional edged tools. We have challenged for years the goal of making with a machine a knife which up to now could only be handmade by a master craftsman. A group of technical experts at our company developed the NC machine tool. It can grind the free curved surface of our knife using automatic machine manufacturing technology. The challenge to reproduce the exquisite work of the master Sakai craftsman has been realized with the ROCKSTEAD BRAND. The name ROCKSTEAD comes from the English translation of our founder's name. Naming the new brand ROCKSTEAD expresses the strength and reliability of our product. |
| Our knives production process |
| 1. A model is fabricated and measured with a 3-dimensional measuring instrument. 2. A 3-dimensional CAD drawing is made from the data. 3. NC machining data is made from the CAD by CAM. 4. The data is sent to a custom designed machine tool. 5. The equipment produces the 3-dimensional form, including the newly developed convex blade surface. 6. The knife undergoes a special non-distortion heat treatment. 7. The edge is given a mirror-like finish with specially developed technology. 8. Surface treatment is performed(DLC or TiAln) according to the kind of steel materials to be used. The ROCKSTEAD BRAND has just been introduced for your evaluation. We are waiting to hear your feedback. Thank you. |
