Renovating an Infill Shoulder Plane

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Derek Cohen (Perth Oz)

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Location
Perth, Australia
Renovating an Infill Shoulder Plane


A few years ago I bought an infill shoulder plane that was advertised on an Internet site as a Norris. It certainly had the lines of a Norris, and it was cheap enough to take a chance. Well, it duly arrived, and it turned out to be shop-made.

Who ever made it – there was no manufacturers name or any identification, other than the single word “steel” printed on the front lip – certainly knew his stuff. The shoulder plane was beautifully dovetailed, the (Mahogany?) infill a perfect fit, the mouth was small and the sides were square. Someone suggested it might be a Slater. Anything is possible – Slater certainly made planes under different disguises, however there usually was some inscribed information that it was one of his. This plane had nothing, nada, zip.

IMG_2294a.jpg


There were a few negative features – such as the pitting, poorly fitted screws (as if someone had replaced them at some stage (which might suggest that the infill had been replaced as well), the wedge was quite chewed up, and the iron was short.

IMG_2293a.jpg


It was the short iron that bothered me the most since this made it very difficult to adjust for projection. The iron’s blade was a little over 30mm (1 ¼”), which is a reasonable length. It was a thick 3/16”. The problem lay with the stalk, which was short by about 75mm (3”).


IMG_2291a.jpg


I spent some time checking out the prices of a replacement, but this was actually more than the price I paid for the plane! So I put it off and just made do. With a sharp iron, this shoulder plane performed very well.

I also liked the size: 30mm (1 ¼”) wide, 201m (8”) long, and 65mm (2 ½”) high at the center. It had heft and authority.

So time went by, and finally I decided to do something about that iron….

Repairing the iron

The solution was simply to lengthen the stalk. Unfortunately I do not own a welder. So I decided to rivet on an extra piece. Also, while I was about it, I thought that I would create a snecked rear end.

The first step was to cut and roughly shape a length of mild steel (taken from an offcut of angle section).

A lap joint was then ground and filed and sanded onto both the stalk and the extension.


Makingtheextensioncombo.jpg


The tools I used were very basic: files, small angle grinder, disk sander and belt sander combo.

The plan now was to add to join the two pieces with rivets. I had some 5mm brass rod that should work. So the first step was to drill a 5mm hole in each piece, then chamfer the inside for the rivet.

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A small piece of the brass rod was cut ….

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….. and the end peined.

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This was placed in the holes, trimmed shorted, then peined to complete the rivet at one end.

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Before the other side could be done, the rivet first had to be filed flush. Then the procedure was repeated for the second hole.

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A little filing and smoothing with a deburring wheel, and it came up really well.

Cosmetics

I trust what follows does not upset anyone. The plane is an unknown make but well made. I felt that it would be respectful to the maker to try and return it to a state in which it might also be appreciated for its looks.

While the pitting of the steel body did not affect its performance, the walls were not flat – in places they curved inward very slightly. I decided to lap the sides until they were flat, which would also take care of the pitting.

The sole was left as-is as this was flat. The pitting was minimal, with the steel only discoloured.

Mouth.jpg


Initially I planned to replace the screws with fresh steel screws and then file these flush with the body, thereby enabling them to disappear. However I discovered that the ones I had were too narrow and so used some brass ones that were the correct size. I had done this before with a Spiers smoother and liked the effect.

Lapping was done (less screws and less iron) on a belt sander, beginning with 80 grit and working through to 240 grit. At this point the screws were replaced, ground down flush with the body, and the lapping recommenced with 240 and then 400 grit belts.

The chips on the wedge were sanded out. This did not alter the dimensions. All other wood was just cleaned as I wanted to retain as much of the patina as possible. While this was removed on the wedge, polishing with a mix of shellac and waxes created a very close colouring. I am confident that the wedge will quickly regain patina through use.

The finished plane

The end result looks like this:

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Regards from Perth

Derek
 
Wow :shock: Thats quite a transformation. When I was reading the bit about the mild steel I half way expected to see you heat treating something. Then was surprised to see you extending it. I don't think that would have ever occured to me. Great job!

I think you and Jake must be in competition to see who is the most innovative :wink:
 
That looks great Derek. I would never have thought about riveting to extend the blade. I like the use of the magnetic stand to hold the steel while on the sander as well, very clever.

John
 
Derek

Nice work! I'm particularly interested because I have a London pattern Slater infill shoulder plane. Its dimensions are identical to your plane but the middle turret has a shallower curve. The iron is 7 3/8 inches long.

It's really good to see how you do your metalwork. I'm woefully ignorant in this area but I've got some brass rod and you've inspired me to have a go at rivetting. Many thanks for posting.

Regards.
 
Derek

Looking again at your plane, the mouth seems amazingly tight. The mouth on my Slater is 4mm wide and this is necessary because the iron is mounted low at 15 degrees. Presumably your iron must be mounted more steeply than this?

Regards.
 
Hi Evergreen

Yes, the mouth of this shoulder plane is incredibly tight, so small that it is not worth trying to measure - I wasn't going to weaken the sole or open the mouth by lapping it.

The bed is 20 degrees.

I would love you to post a picture or two of your Slater here for comparison of style. It is possible that this one is a Preston. I posted the article on Wood Central and it was noted that "steel" appears on the front rim of a Preston as well. Anyone here have a Preston to show?

Regards from Perth

Derek
 
Hi Derek

Here is my Slater.
DSC00036.jpg

At least, I think it's a Slater because the iron is clearly stamped underneath.
DSC00038.jpg

The body has no markings whatsoever and could be shopmade but it's damn well done if it is. I've shown it with the wedge and iron removed to demonstrate the subtle angle of the top bridge between the two sides. This gives you just a fraction more space to slide the iron in.
DSC00035.jpg

The mouth is quite wide at 4mm.
DSC00033.jpg

Sorry the pictures are so big. I tried to resize them but they wouldn't stay resized for some reason!

Regards.
 
nicely done Derek.

when peining rivets its better to have a tapered hole rather than a countersunk hole. the rivet then has more grip after being mushroomed in.
with countersinking, if you skim too much off the sides you lose the grip from the rivets.
a little taper reamer is ideal

PDR0075.jpg


I
 
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