"Ellsworth" grind

Re: "Ellsworth" grind

Wally Dickerman at Green Valley, Az.

>Brian, you can grind an Ellsworth grind, or very close to it on either gouge. The nose angle can be anywhere btween 60 to 70 degrees. 60 deg. is a liitle more user friendly, I think. I strongly advise you to buy or make your own jig to grind it. Oneway's Wolverine is a good choice, but you can buy the jig that is sold under Ellsworths name for a lot less. If you decide to make your own, there are plans available on the web.

Wally

Re: "Ellsworth" grind *LINK*

Fred Holder

>I own a Crown made Ellsworth Grind Gouge in PRO-PM and also have a Crown PRO-PM 5/8" bowl gouge. The latter came first. The flute geometry looks very similar on both tools, if not the same. I found that I could not get an exact match of the Ellsworth Grind with any of my jigs and finally invested in one of his grinding jigs. I set it up per the instructions and it matched the Ellsworth Grind from the factory to a "T". In my test of the tool, reported in the February issue of Woodturning magazine, I turned three bowls with a sharpening put on with the Tormek, but I could not match the grind configuration exactly with the Tormek, but I did manage to sharpen the edge.

I subsquently took the 5/8" Crown PRO-PM gouge that I've had for a couple of years or longer and ground it using the Ellsworth Jig. To my eye, the tools looked the same and the resulting bevel looked the same.

As a result, I would suggest the purchase of an Ellsworth Grinding Jig from Craft Supplies USA or elsewhere. Set it up properly and grind both of your gouges to the Ellsworth Grind. It works very well.


Fred Holder's Domain Site

Re: "Ellsworth" grind

Brian Roberts

>Thanks Wally!

I assume the "nose angle" is the angle of the back of the gouge to the concave ground shape, as viewed from the side?

I found Jean Michel's site and found the grinding jig plans he offered. He did a beautiful job on them - gave me a great place to start. I've done all my grinding free-hand for years, but I think you are correct - might be better to jig this one!

I'm confused?

Brian Roberts

>O.K. - I'm confusing myself now (wish I could include a sketch) - is nose angle the angle of the ground bevel to the "wings" as viewed from the side or the angle of the ground bevel to the bottom of the gouge?

Re: I'm confused?

TDaniel

>Brian, nose angle will be determined by the distance the tool is from the grind wheel; assuming your tool is mounted where the point is at the center of the wheel, the more tool you extend thru the jig, the more acute the bevel will be. The side angles are determined by the adjustment of your jig.

TD

Re: "Ellsworth" grind

Brad Vietje

>Brian,

You can put an "Ellsworth" or side-grind, or Irish, or Celtic grind on any bowl gouge, but the tool will behave a little differently depending on the geometry of the flute that is ground into the round bar stock (though I think powder metals are actually molded that way). Real sticklers will probably tell you that if it doesn't have D.E's signature on it, then it ain't the real deal.

The Ellsworth gouge has a wider flute than the superflute or the Pro-Pm bowl gouge, so it ejects chips a little diferently. Similarly, the Glaser bowl gouges tend to have a narrower flute -- each shape has certain advantages and certain dis-advantages. Once you get the tool ground to a desired profile, you can certainly master its use with practice, regardless of the shape of the flute.

Safe Spinning,

Brad Vietje

Thetford, VT

Re: "Ellsworth" grind

Mike Schwing from Md.

>I use Ellsworth's grinding jig and it couldn't be easier to sharpen and maintain that perfect profile. You have to build the bottom half of the jig on your own but thats a snap as well. The one thing that needs paying careful attention to is the grinding of the tip. I tend to grind it to be more pointed than round, and it decreases the usefuleness of the tool quite dramatically. I can notice it quite quickly when attempting an interior finishing cut or when getting deeper into a bowl. A little more work on the grindner to return it to its more rounded shape and everything is right in the world again.

Re: "Ellsworth" grind

Jim Pugh in Ohio

>Brian, go to the top left side of this frame and there is a box labeled "tool grinds". Select that and work your way down to Joel Hunnicutt's section which is labeled "Various bowl gouges".

The 'nose angle' is from the bottom surface to the cutting point. A sharper angle allows the tool to start cutting on the inside of a bowl more easily. A more blunt nose angle allows cutting down in the lower/bottom of the inside of a bowl more easily.

Re: "Ellsworth" grind *LINK*

Doug Bartos in MD

>Hi Brian,

Attached is a link to the instructions for using the Ellsworth jig. It shows the cutting angles and how far back to cut the wings as well as how to construct the sliding jig. Hope this helps.

Doug


Ellsworth Jig Instructions

Ahhhhh........pictures!!!

Brian Roberts

>A heartfelt thank you to all who responded!!

I knew you would have the answers I needed. And the links to pictures are what I really needed!!! Now, I'd like to think I'm fairly intelligent (SWMBO says the smartest thing I ever did was to marry her), but when I see the pictures it finally all makes sense.