Adjustable Block Plane Retro Conversion.

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Project by RusticJohn posted 01-24-2016 08:15 AM 1725 views 2 times favorited 3 comments Add to Favorites Watch

I have converted this small block plane to have an adjustable blade. All of the parts were made from scrap metal, mostly using a wood turning lathe, a hack saw and a file. The plane was originally made in 2008 as a standard Krenov model. However the blade was set at 60 degrees which worked well but was always hard to adjust. A lot of force was needed on the back of the plane to loosen the wedge.

I have wanted to make an adjustment mechanism for some time so but lacked the confidence as my metal working skills are rudimentary. However after making most parts twice, because of errors, and some choice words an OK result was obtained. The plane cuts well and can be given a very fine blade depth adjustment.

Because this was a retro fit onto an existing plane there were complications. Accurately measuring holes on a curvy plane is not easy. Fitting the cap iron to the body was stressful and even now I am not sure how it went in. It was necessary to lower the pin. The shape of the body needed to be changed as it was designed for a wedge. The sides around the mouth were lowered and reshaped slightly. I didn’t want to loose the original shape as it looked rather nice. Metal can be turned on a woodworking lathe if it is solid and has a 3 jaw engineers chuck. I make all my own metal cutting tools based on Holtzpaffell’s ideas and can handle anything up to mild steel hardness.

A good outcome that has provided good lessons to be applied to the next conversion job.

-- RusticJohn

3 comments so far

View racerglen's profile


3112 posts in 4237 days

#1 posted 01-24-2016 12:35 PM

Another fine piece John, love what you do !

-- Glen, B.C. Canada

View Woodbridge's profile


3755 posts in 3875 days

#2 posted 01-24-2016 03:08 PM

very nice retro

-- Peter, Woodbridge, Ontario

View Ivan's profile


17283 posts in 4324 days

#3 posted 01-25-2016 01:41 PM

Realy nice ,handy design.

-- Ivan, Croatia, Wooddicted

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