Banshu Miki Uchihamono



Features of Miki Hardware Plane

Until the Heian period, it relied on the work of shaving wood with a spear plane.
The wisdom of craftsmen has created something with a stand like the current one.
It is stated that there were 6 plane smiths in Bunsei 2 (1828) in Miki.
21 processes such as forge welding of steel and iron-forging-quenching-back sharpening-mud coating-stand attaching
The plane, which has become a product after that, has become very popular among carpenters as a high-class plane with excellent sharpness no matter how many times it is shaved, and it has been well received as a tool that makes full use of traditional techniques.

Manufacturing process

1Steel making

Cut the steel to the size of the blade.

2Making iron

Process iron (soft iron, kettle) to the required size.

3Forge welding

Work to join iron and steel. Apply a bonding agent to iron, heat it to a high temperature (1000 to 1100℃), and hit it with a mallet to bond it.


Heat the forge-welded material (800-900℃) and forge it with a mallet to form a shape.


The structure of steel disordered by forge welding and forging is placed in a furnace heated to 750℃ and slowly cooled to spheroidize the structure.

6Steel repair>Steel repair

Work to make the thickness of steel that varies during forging uniform.

7Back sharpening

Polishing work to remove the black skin created during forging.

8Smoothing shape

Make the back while hitting with a mallet.


Shape it with a grinder or the like.


Work to polish the back with a grinder.


Engrave a trademark, etc.

12Mud coating

Apply mud (abrasive powder) so that the quenching is evenly performed.


Work to harden steel by heating it to 780 to 800℃, soaking it in water and quenching it.

14Back top finish

The upper surface (the back part other than steel) is colored and polished.


Heat to 180℃ to make the steel sticky.


Remove the distortion of the finish.


Work to polish with the buff on the back side.

18Sharpening wood

Gloss the back side with a wooden whetstone.


Attach a blade using a rough whetstone, a medium whetstone, and a finishing whetstone.


Use the oak to set the plane blade on the table.


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