Krenov Plane

A Krenov style plane to suit a 42mm plane blade from a block plane. The plane block is styled like a Japanese plane block, i.e. a block with chamfered edges.

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Concept


When I first began woodworking, I bought a cheap block plane for menial work, rounding edges, clearing tearout, etc. After I had to convert to using hand tools, this block plane was no longer sufficient for more involved duties such as smoothing surfaces and squaring edges. The blade was adequate, but the plane body and overall setup made it difficult to use, create a nice finish and keep steady.

A simple metal block plane
The original block plane in use

A Japanese plane block was considered first, however, the western style blade meant it would not self-seat in the plane block. An easy to make body and system was required. A Krenov plane body is one of the easiest to make. Thus, it was chosen as the style for the wooden plane body.

A Krenov plane
An example of a Krenov plane

A design was created to blend the Krenov construction with a Japanese style. Using a metal pin rather than a wood dowel for holding the blade, and having a square block with chamfered edges would achieve the look.

A Krenov plane CAD render
Concept render of the Krenov plane
A Krenov plane diagram
Diagram of Krenov plane parts and dimensions

Build


Pine was chosen for the body as I had a 42mm post which would work perfectly.

Wood blocks
The 42mm post and 12mm boards were cut as well as dowels for wood nails
Wooden box
The box assembled and glued
Wooden plane body
The overhanging wood was cut and the body was planed
Wooden plane body
The body was chamfered to support impacts and be comfortable
Wooden plane body
The blocks were chiseled to create the mouth
Steel rod
The excess rod from the pedalboard springs were used as a pin
The completed Krenov plane
The completed and assembled Krenov plane

The plane manages to achieve a Japanese-style look to an extent. Nonetheless it is functional and works much better than the original block plane. The 3mm music wire was surprisingly as strong as a usual pin.