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Decimal Equivalents| Abrasive Grit| Diamond Grit

Power SharpeningA-13 Infill Hand Plane

Everyone Needs a Grinder !

Power with out a doubt is the way to go..
When I first started out I though that I could get by with my trusty hand stones but I was refinishing hand plane blades and found that is was much to slow and labor intensive.. You need some kind of power sharpener if it is just a 6" or 8" bench grinder.. A two speed or low 1725 RPM model is better but you can use a 3600 RPM model.. You will just have to cool the blade much more often in water so not to over heat the blade and loose the temper (hardness). I do belive if you a brand new to hand planes and dont have any investment in stones and jigs, it might be best to buy a power sharpening system than a lot of stones and jigs.. I like the Lee valley MK II I have neber seen or tried one but I built my MK III on its design,, I like that you can use fine grits on the system not use a honing compound on a leather wheel like the Tormek.. I do think for lathe tools that the Tormek may be eaiser to sharpen tool than the MK II style sharpeners..

HF Slow Wet 8"

This is a a pretty good Slow/Wet Grinder I picked up at Harbor Freight for $49, the large 10" wheel spins at 200 RPMs and the small 6" at 3400 RPMs..
Te tool rest I made at work on my break and modeled it some what after the LeeValley Veritas tool rest.. It's great for grinding a chipped really bad iron on a plane blade, especially with the amount of poorly sharpened irons I need to do each month, Power is the way to go.

HF Grinder I bought for $49 in pictures below..
They have had sales with price as low as $39 2003

HF Grinder

Here you see loaded a Stanley 750 Chisel that I am sharpening a 25 degree primary angle..
Next step is to hone on bench stones the secondary angle form 27-30

Hf 8" Grinder

View of the profile I milled clamp block.
I hope to be changing this set up soon and remove the 3/8" bar and make it easier for free hand use...


I had time to use this machine much more than when I first wrote it..
The wet wheel is very light on power and will work fine but you must use the high speed wheel to rough the blade first.. I made the tool rest below and I found I was over heating the bearing of the slow wheel by adding to much presure becuse I was not using the high speed wheel.. All in all I would use hand stones after sharpening and came to the conclusion that I had might as well bought a bench grinder...

Bench Grinder is a Must !

After the Primary Edge is roughed on the Iron (Blade) with either a Wet Slow Speed Grinder or The Sharp Sharp Method Below, I think use several different Bench Stones to Hone the Edge to a razors edge. If you don't have a Wet Slow Grinder the next best grinder is a Slow Speed Bench Grinder or a Variable Speed Grinder Like the WC Slow Speed 8" or if you do a lot of grinding a HF 10" even a HF 6" is better then none at all

10" HF Bench Grinder

If you have a standard bench grinder you will have to be extra careful not to let the chisel or iron get to hot and turn blue.. Keep a plastic container of water near by to cool the what ever you are grinning. With the Standard Speed 3400 RPM grinder I would stay away from grinding the very edge of the cutting tool by at the least 1/32" if you try to grind to the very edge 9 out of 10 times the steel with turn blue and you will lose the temper (hardness).. What I would do is if I will hone the secondary angle at 30° I would power grind the primary angle to 25° and then hone on a bench stone the final 30°

I also bought a Jet 10" Slow Wet Grinder when they first where introduced and feel unless your using it for Lathe Tool sharpening you only need a bech grinder with the WC 8" Slow Speed Grinder would be my first choice if I had to do it over again..


Make sure you check out my MK III Sharpening Machine


Sharpening Jigs and Gauges A review of the numerous Jigs on the market and which Jigs that might help you decide which one you might want to buy..

Power Sharpening I feel everyone should have at least one power sharpener in a shop.. On this page I go over several machine types that are made today.

Scary Sharp Sharpening is a method of sharpening some one came up with to sharpen blades on sand paper instead of a bench stones and is the most common method for new sharpeners to use..

Bench Stones oil stones vs water stones and what the pros and cons of these honing stones .. With a section of Shapton's to come..

MK III Power Sharpener This page is about the sharpening machine I made and modeled after two popular machines on the markets

Grit Equivalency Gives you a beak down of what abrasive in classes of grit so you can gauge the abrasive qualities of one to another.

Loose Grit Sharpening Blades and Iron or Flattening Bench Stones Loose Grit is a great method to use.. It is also good for extending the life of Scary Sharp Sand Paper

Diamond Equivalency Mesh sizes in micros so you can look the them up and figure about what they compare to in regular grit

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