The skill of sharpening your tools is as important as the skill of using your woodwork hand tools. A good sharpening session can turn your grandfather’s old plane into a sentimental but highly valued tool. A brand new, budget plane can perform as well as their higher priced cousin with the right sharpening.
Machine Marks
If you have bought a premium plane, you may not need to do much to it once you have taken it out of the box. Less expensive planes may need a little more attention. Inspect the blade carefully for any machining marks. If you find any marks, you will need to flatten and polish the back of the blade. Start with the coarsest grit and work your way up through the grits until the marks are removed, and you have a mirror finish. Only worry about the edge of the blade’s back as the rest of the blade won’t touch the wood so the machine marks can remain.Bevel Edge
The primary bevel of your plane edge should be 25 degrees unless it’s needed for work on a difficult grain. If your bevel is not the right angle, the edge isn’t square or is damaged, you will need to re-grind it. A water-cooled, large grinder will make the job easy but with a little patience you can do the job with sandpaper. Once you are happy with the edge, you can start to polish it. Use various sandpapers to get a polished mirror finish. A honing guide will help you achieve the desired result.If your blade is in poor condition with rust or bad nicks, it may be wise to replace the blade. You can spend hours trying to get a blade into a usable condition and find it is too severely damaged. Make the call early and decide if it can be salvaged or not. Several manufacturers still make blades to fit the width of old planes, just ask.
Micro Bevel
Once you are happy with your bevel edge, it is time to start work on the micro bevel. This secondary bevel should be around 2-5% higher than the primary one. No new planes come with a micro bevel so all blades need some work to achieve this. Start with coarse sandpaper to establish a thin, even line across the blade’s tip. Use your highest grit and then polishing stone for another mirror finish.Once you have a perfectly sharp and honed plane blade, you will only need to work on the micro bevel with a fine stone regularly.
Camber or Left Straight
One decision woodworkers need to make about their new planes is whether to camber the edge or leave it straight. Newbie woodworkers can benefit from a cambered edge because it is more forgiving than a straight edge. If you don’t set the blade at an equal depth on both sides, it can dig in more on one side.To camber use your stone to take slightly more metal the further from the middle. Count the number of strokes you use on the first side so you can repeat evenly on the other side. You should see a slight curvature on the cutting edge. Planes used on heavier timber can have a greater curvature.
If you want to reduce the time, it takes to camber your plane and, you want to preserve your stone, use a power or hand-cranked grinder.
Make it a habit to check the edge of your plane’s blade every time you begin a project. A perfectly sharpened and honed blade edge can make the job easier and the result more precise.
