Setting up and sharpening bench planes (intro)

Here is what I discovered about setting up and sharpening bench planes.

If you read some of the many bench plane discussions on woodworking forums you will at some point stumble upon a debate about the best way to sharpen and flatten them1)yes, that’s right, plane soles are often not flat.

Sadly these debates are often marred by ill humour with each side taking affront at the possibility of an alternative method to the one they are advocating.   It is hard to fathom why the subject attracts such emotion, but it does.

Not unreasonably a degree of opprobrium is reserved for internet pundits who – like me – are neither woodworkers nor craftsman but have an opinion nonetheless.   My only defence for this post is that I make no claim to be an expert, and can honestly say that the little I have learned has been carefully researched and tested as best I can in practice.  If nothing else I hope I can offer fellow novices the small service of summarizing the many opinions that the internet has spewed forth on the matter.

The perspectives of others participating in these discussions are often revealing, for example:

  • the enthusiastic but casual amateur woodworker will often be prepared to go to extreme efforts to get the best results, since they are doing it for fun and time is not their primary consideration.
  • Someone running a woodworking school will have other criteria, in particular they will tend to like techniques that allow them to keep dozens of tools sharp with minimal effort and that can easily be taught to new students.
  • And finally, the (dwindling) number of people who earn a living using hand tools will do whatever they find most convenient and will naturally have an affinity to whichever approach they were taught as an apprentice.

Throw in a multitude of possible methods and a (tiny) bit of science and there is a lot of scope for disagreement about which is the True Way.

The good news is that that all the different approaches seem to have the same end result – namely a sharp edge – so If you can’t muster the energy to read the original discussions or my summary, then my advice is pick a pundit of your choice, do some practice and then turn your attention to other matters2)Paul Sellers, as ever, is a source of practical and well explained advice – take a look at his youtube videos.

If you want to persevere, gentle reader, bear with me while I attempt to lead you through the state-of-the art of all things plane sharpening, starting at the very beginning.

Why bother sharpening and flattening your tools?

As I mentioned in an earlier post the sheer amount of information on this topic – some of it contradictory – and the vociferous way it is often presented can be intimidating, particularly when you approach the subject from a perspective of complete inexperience, as  I did.

To give you an idea of the depth of my ignorance you should know that, although I understood that so-called edge tools (knives, saws, chisels, axes, planes etc) needed to be sharp to work efficiently, I naively assumed that new tools would arrive sharp from the manufacturer and had a vague idea they would stay sharp for a long time, quite possibly longer than the natural life of the tool itself.

It turns out that both these assumptions are wrong.  There are exceptions, for instance in the world of planes, top-end modern manufacturers will supply tools that are sharp out of the box, but that, in common with any tool – old or new, cheap or expensive – will eventually be made blunt with use3)another interesting exception is modern “hard-point” saws which are sharpened at the factory and are – by design- expected to be replaced when blunt.  These have now pretty much vanquished the older saws that had to be sharpened by hand, but could last for decades of use.

Furthermore, unless you are the lucky type, you can safely assume that your eBay sourced plane or your el-cheapo modern plane will not be sharp when you first get it.

So there is no escaping it, you’ll have to learn how to sharpen.

What about flattening?  Just as precision power tools can’t be guaranteed to arrive 100% accurately set up and will require some “fettling” to work optimality, even comparatively simple hand tools may need some set-up work too, in particular surfaces that are machined to fit together may not do so 100% accurately and the plane sole may not be flat.

There are a number of reasons this might be so: the manufacturing techniques and materials in use 60 or 70 years ago did not allow the same kind of cost-effective accurate machining as is possible today, so some variation in production was unavoidable.  Also today’s modern manufactures may forgo some of the production process that result in a more refined product so they can compete better on price.  And finally, tools wear with use and surfaces that were flat originally may change shape over time.

The good news is that sharpening and setting up a plane is not a difficult skill to master.    Indeed it is frequently repeated view that pretty much any plane, no matter the price, can be got to work well if you are prepared to put in enough effort.

In the next couple of posts I will tell you how I went about doing this with mine and what evidence can be mustered in favour of the various techniques you may choose to employ.

 

banana

References   [ + ]

1. yes, that’s right, plane soles are often not flat
2. Paul Sellers, as ever, is a source of practical and well explained advice – take a look at his youtube videos
3. another interesting exception is modern “hard-point” saws which are sharpened at the factory and are – by design- expected to be replaced when blunt.  These have now pretty much vanquished the older saws that had to be sharpened by hand, but could last for decades of use

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