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tool too sharp ?? (Read 276 times)
 
jimmy russell
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central machinery 10 x 18
tool too sharp ??
Oct 2nd, 2017 at 10:06am
 
hey gang..i gotta question...is it possible to have somekind of dangerous angle on a tool ??  Im asking because im turning an extremely hardwood bowl (oak endgrain) and my tools are extremely sharp...but i do them by hand with no real idea of the angle.....as soon as it barely touches the wood...i mean barely...it digs in like crazy...and scares the bajeezus out of me...jumped off the jaws twice already...and i got some strawberries an my knuckles as well...help...
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Tom Coghill
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Re: tool too sharp ??
Reply #1 - Oct 2nd, 2017 at 10:37am
 
Jim - you are experiencing a "catch".  This happens when the tool is presented to the wood incorrectly.  Not knowing what tool you are using, my best recommendation is to find a local AAW group and join.  They will teach you to turn safely and avoid the catch.

Others may request you provide location info as to help you.  You can load that info in your profile.

Be Safe!
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« Last Edit: Oct 2nd, 2017 at 11:37am by Tom Coghill »  
 
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Don Stephan
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Re: tool too sharp ??
Reply #2 - Oct 2nd, 2017 at 10:45am
 
Jimmy

What is your turning experience before this situation - what tools have you used successfully and what types of projects.  What tool is causing the problem on the oak bowl, and are you experiencing this inside or outside?

Finally, what does the bevel look like on the tool causing the problem?
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Ed Weber
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Re: tool too sharp ??
Reply #3 - Oct 2nd, 2017 at 11:08am
 
Long story short, no you can't have a tool too sharp.
While there are many factors involved with a catch or dig-in, IMO the main issue is tool presentation. The cutting edge needs to be presented to the spinning wood at the proper angle for the particular task. As has been mentioned, we would need to know some more information about your situation before we can give more targeted advice.
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jimmy russell
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Re: tool too sharp ??
Reply #4 - Oct 2nd, 2017 at 2:56pm
 
i have only been turning for about 2 months...but ive done about 30 hours per week (its addictive).i am in tampico mexico so i do not have access to classes or tools except those purchased online from the states....the tool i was using is from a set...i was using the 3/8" spindle roughing gouge to try and hollow out the bowl...i do not have a bowl gouge yet...i did try and put a rounded point on the roughing gouge to make it more like the bowl gouge....im sure a lot of you guys are laughing your asses off by now...either way thx for the help and encouragement...
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jimmy russell
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central machinery 10 x 18
Re: tool too sharp ??
Reply #5 - Oct 2nd, 2017 at 3:38pm
 
problem solved...it was definitely the angle...i had my degrees backwards...instead of 30 it was about 70...30 upside down though..lol..either way i just carved through the bowl with no catches...wasnt as hard of wood as i thought...i will post some pics so you guys can see that i got talent...hardy har..
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Don Stephan
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Re: tool too sharp ??
Reply #6 - Oct 2nd, 2017 at 4:07pm
 
Never have I heard of a 3/8" spindle roughing gouge, could you have perhaps a 3/8" spindle/spindle detail/detail gouge?

Regardless, I've read numerous third party reports of those breaking as a result of a catch while hollowing the inside of a bowl.

Bowl gouges come as parbola, U, and V (the interior shape of a bowl gouge), but all are much stronger and are the only gouges that should be used to hollow the inside of a bowl.

Reed Gray, aka Robo Hippy, has a Youtube video showing how he has used a thick scraper to hollow the inside of bowls, and some people use carbide tools.

There are too many videos on Youtube and similar sites that demonstrate questionable practices, but the videos listed on this web site have been previewed for proper and safe work on the lathe.
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Glenn Matthies
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Re: tool too sharp ??
Reply #7 - Oct 3rd, 2017 at 6:25am
 
Spindle gouge or spindle roughing gouge.  They are two different things.  Under NO circumstances should you use a spindle roughing gouge (SRG) for hollowing out a bowl.  The tang is too thin compared to the size of the gouge and could break while turning if you get a catch.  This would turn the SRG into a potentially fatal projectile.  Spindle gouge can be be used safely although it isn't the ideal tool for the job. 

I do agree with others that the problem is likely presentation of the cutting edge to the wood. 

One general observation about turning...  When the tool is presented correctly, it cuts smoothly.  If you present it incorrectly, is works poorly, catches or doesn't cut at all.  Its easy to tell if you are doing it right or not but it isn't always easy to figure out what you are doing wrong.

Good luck and turn on!
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John Grace
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Re: tool too sharp ??
Reply #8 - Oct 4th, 2017 at 6:16am
 
Jimmy...As others have already mentioned, a bowl gouge (even a cheap one) is your first order of business.  Relative to how to's, you can readily find hundreds of very good and more than a few really bad ones on YouTube.  Like you, access to a turning club wasn't practical for me either and YouTube is where I learned most of the techniques.  Good luck and safe turning...
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