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Chisel Sharpening

Posted: Fri Nov 14, 2008 12:46 pm
by thebear
I recently received the lathe chisel sharpening tool from SS that mounts on table and uses the disk sander. My question is that the round nose chisel comes from the factory at 30 degrees and this tool want to take it to 15 degrees. What is everybody's opinion of changing the angle. I am fairly new to turning. Thanks h

Posted: Fri Nov 14, 2008 2:59 pm
by ryanbp01
Bear-

I use the strip sander with the chisel sharpening attachment. I like it since it makes sharpening nearly goof-proof. As far as changing the angle is concerned, I have not noticed any problem when turning. If you are sharpening chisels with your method, place a clean cloth towel (I use white)across the way tubes to catch the metal shavings. This helps to reduce shavings getting into the headstock. Your copy of PTWFE is also a good source of information.

BPR

Posted: Fri Nov 14, 2008 4:21 pm
by beeg
Lathe chisel sharpening angles are mostly a personal preference. I think I left my round nose at the original angle.

Posted: Fri Nov 14, 2008 6:45 pm
by shydragon
At the TA I attended, this is what Rick recommended.

Gouge...13 degrees left of 0
3/8" Gouge...5 degrees left of 0
Skew...13 degrees left of 0
Parting...8 degrees of left of 0
Scraper...0 degrees

Bowl Gouges...4 degrees left of 0

Notes on the Skew...Toe up and to right side (2nd station). Heel up to left side.

Notes on the scraper... Turn tool around and set to 0 degrees

Posted: Fri Nov 14, 2008 8:27 pm
by beeg
shydragon wrote:At the TA I attended, this is what Rick recommended.

Gouge...13 degrees left of 0.
3/8" Gouge...5 degrees left of 0.
Skew...13 degrees left of 0.
Parting...8 degrees of left of 0.
Scraper...0 degrees.

Bowl Gouges...4 degrees left of 0.

Notes on the Skew...Toe up and to right side (2nd station). Heel up to left side.

Notes on the scraper... Turn tool around and set to 0 degrees.

So the angles would be as follows.

Gouge...13 degrees left of 0. = 32&#176]
3/8" Gouge...5 degrees left of 0. = 40°
Skew...13 degrees left of 0. = 32°
Parting...8 degrees of left of 0. = 37°
Scraper...0 degrees. = 45°

Bowl Gouges...4 degrees left of 0. = 41°

Posted: Sat Nov 15, 2008 3:23 am
by a1gutterman
Rick did say that SS sends out the chisels unsharpened and he did make recommendations, as previously stated, but it is my understanding that a turner with experience, will want more then one chisel, of the same style, that have different angles (I am knot such a person).

Chisel Sharpening

Posted: Sat Nov 15, 2008 8:32 am
by flashbacpt
TheBear,

Lets keep this simple........You are new to turning which means that you have a lot of fun ahead of you, beyond what you can imagine, and you have a lot to learn, which also can be a lot of fun.

You have purchased the Lathe Tool sharpening guide that works with the flat disk.... Go with the "settings" given by ShyDragon. In addition, do the following, mark your settings on your guide (the guide does not have 13 degrees) , and then mark the end of the tool handle with the proper settings (ie. 13L). By doing both, you have saved yourself a lot of time trying to remember the settings or looking for that piece of paper that you wrote them down on. Also, by marking the gauge with the settings, you can return to the exact setting. Once sharpened, you are set to go.

Yes, those brand new tools NEED Sharpening! The gouge will take a little longer to sharpened as you are grinding a new angle!

Best of Luck!
FlashbacPT
John:)

Posted: Sat Nov 15, 2008 10:05 am
by shydragon
Rick did mention the first time through, that we would consume two sandpaper discs, after that it should be touchup. Also, he mentioned dipping the tool in water frequently.

Posted: Sat Nov 15, 2008 10:24 am
by Ed in Tampa
beeg wrote:So the angles would be as follows.

Gouge...13 degrees left of 0.32°
3/8" Gouge...5 degrees left of 0.40°
Skew...13 degrees left of 0.32°
Parting...8 degrees of left of 0.37°
Scraper...0 degrees.45°

Bowl Gouges...4 degrees left of 0. 41°
Huh???????
Bob where are you getting .32 .40 and .45 degrees from???????

Posted: Sat Nov 15, 2008 11:03 am
by beeg
The zero setting gives you a 45°. So 45 - 13 = 32° angle. I still think if Bear is just starting out turning, he should keep the original angles for now. But as far as the round nose tool, he may want to go ahead and change the angle now. Since the guide is setup for the 15° angle.

Since your changing the angle, I'd make one grind pass, dip the tool in water, make another pass, dip it, pass, dip, pass, dip. Until you have the new profile done.