Correcting bad bowl gouge sharpening video

[john lucas]

I put this video together last night to show how to correct bad sharpening of a bowl gouge. I also added how I sharpen my hollowing tools and a dovetail rebate tool. Hope it helps.
http://www.youtube.com/watch?v=M9G16ylEZHQ

 

[Dean Center]

Very helpful and clear. Keep 'em coming.

 

[TJ Hamilton]

John, thanks for the informative and useful tutorial.

In the first segment, it looks like you are correcting the grind on the bowl gouge freehand, ie, without a tool rest. Is that correct?

Second, do you have a source for the carbide tool stock?


Thanks, Tom, just a tad south in Douglasville, GA

 

[john lucas]

TJ The gouge is in a Wolverine jig. I should have shown that I guess. However you would do the same thing freehand it would just take more skill.
You can buy HSS carbide cutters from any place that sells supplies to the metal industry. I usually buy them from either Enco or Grizzly or MSC. www.useenco.com www.grizzly.com www.mscdirect.com Pay attention to the shipping it can be more than the tools. I usually order 10 at a time when I'm placing some other kind of order for those companies.
By the way, I'm Hoosier by birth, Southerner by choice. Born in Brownstown Indiana. I was born in the same hospital as John Mellencamp and in fact my cousin married his cousin a bunch of years back so now we are related.

 

[TJ Hamilton]

Thanks, John. Since we're on this subject, and I've created my share of uneven bowl gouges, what's your opinion of the cause? Too much time or pressure in one place?

Also, thanks for the info on the HSS carbine cutter stock.

If your travels get you down this way please call and we'll get together.

Best regards, Tom, a Muncie Hoosier originally.

 

[john lucas]

You are right, the cause is simply too much pressure or to slow a speed somewhere during the cuts. I think people push to hard on the stone and they seem to think that you go from one side to the other without stopping. Well in a perfect world that works. Usually you have to slow down or make multiple passes on one section of the blade to get the edge ground correctly.

 

[john lucas]

Where is Douglasville, Ga. I'll be demonstrating for the Dalton Area Woodturners next tuesday. If your not too far away come and visit. They meet in the Dalton High school woodshop.

 

[TJ Hamilton]

John, D'Ville is 20 miles west of Atlanta on I-20. Thanks for the heads up on the Dalton demo...but 90 miles is a bit outside my Tuesday night zone!

Best regards, Tom

 

[Wayne Spence]

John-The audlio on the sharpening video was so garbled I could not understand a word you said. I believe the video was clear enough that the audio was not needed but you never know. Keep those videos coming, they are always helpful.

 

[Mark Warden]

John-The audlio on the sharpening video was so garbled I could not understand a word you said. I believe the video was clear enough that the audio was not needed but you never know. Keep those videos coming, they are always helpful.

The Audio sounds fine on my computer just a little hot and maybe you could move the mic more to the side so your P's don't pop so much. Wayne try turning your sound down in the mixer you might have too much gain on the preamp.

 

[john lucas]

I've played the audio on 3 computers and it sounds OK. Well it does have the Pop's I'm using a cheap headset mike. I'll work with it along with all the other things I plan to learn about video and editing etc.

 

[Wayne Spence]

John-My old? computer is now defunct. Finallly hooked the laptop to a monitor and the sound comes through OK. Thanks for checking things out.
The only things more unpredictable than cars and unseasoned wood are computers.

 

[john lucas]

Well I got in my car the other day (a 2003 Honda Civic) and it would not start. Something to do with the chip in the key. Well luckily I was home and woke up my son to try his key. It worked. Mine started working later in the day. If there's one thing in this world that makes me madder than a computer that won't work is electronics in a car. I simply don't need all that crap and it really irritates me that we have to pay for it. What would I have done if I was in a strange city late at night and #@$&@ Key would not work. I'd probably pull out my 45 and fill the sucker with lead and let it sit.

 

[George Clark]

TJ You can buy HSS carbide cutters from any place that sells supplies to the metal industry.

John,

Really helpful videos, but you have confused me in the above quote. Are you referring to HHS cobalt cutters?

George

 

[john lucas]

George No they are just plain High Speed Steel. They are sold in 3" lengths and come in sizes from about 1/8" up to an inch. I buy the 3/16" for about 75 cents each. I buy 10 and still end up paying more for shipping than the cutters cost so I usually try to buy them when I'm purchasing something else such as milling cutters or collets for my lathe.
You can cut these things to size with a Dremel and an abrasive wheel. You can also file a notch in the corners with a triangular file, place them in a vice and break them at the notch by either using large pliers or a hammer. If you use the hammer put a rag over the bit so it won't fly across the room.
I usually make them about 3/4" long, shape them and then glue them into a 1/4" hole. You can also drill and tap the side of your bars so you can use a set screw to lock it in place. I do this on my larger tools so I can remove the bit to make sharpening easier. They can be sharpened on our regular white wheels quite easily.
They come pre hardened. I have silver soldered them plain steel for smaller cutters. The heat won't damage the hardening.

 

[john lucas]

George Grizzly has them. They are a little more expensive than some of the discount metal houses but your probably more likely to order something else from Grizzly so you won't feel as bad about the shipping costs for small items.
http://www.grizzly.com/products/HSS-Square-Tool-Bits-3-16-x-2-1-2-L/G1506

 

[Robin Thompson]

John, thanks for posting the video. Perfect for me as my sharpening skills need improvement. The other thing i took note of is how balanced your grinder is where in comparison mine is all over the place. I'll have to address this perhaps starting with a new and better grinder. Go after the root cause instead of treating the symptoms.

 

[john lucas]

Robin Remove the wheels and see if it still vibrates. If it doesn't then the problem is in the wheels or wheel to spindle contact. If your wheels are very far out of true they will cause the grinder to walk. Sometimes just truing up the front surface of the wheels will stop most if not all the walking.
If money is a problem buy the Woodcraft T shaped diamond wheel cleaning tool. Try truing with this. I did it for years. It's not perfect and something like the Geigerssolution truing wheel is much better, but it does work if your careful to not let it bounce while your truing it.

 

[George Clark]

John,

Thank you for your responses. I find your videos helpful and informative. I, and many others, appreciate your willingness to share your time and knowledge with the woodturning community.

George