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Reed @robo hippy
We actually pretty much agree of the tool usage you described. I think you have 't been around enough bad turners to realize how much wood can drive onto the SRG.
The SRG can engage the whole width of flute 1 1/4" when it catches and once the catch begin the wood could conceivably drive onto the whole length of the tool right up to the handle. However other bad things well before the tool can dig that deeply.
The SRG can scoop up a whole lot more wood mass that a bowl gouge
This video show getting a SRG catch with wood driving onto the whole flute. It was posted a while back
View: https://www.youtube.com/watch?v=IOhHeyoZLaY
the above video uses this mistake to show why you should not use an SRG. I have run into many students who rough bowls with a bowl gouge this way. Somehow they mostly get away with it and they accept the occasional catch as part of the process.
You are absolutely correct misusing the bowl gouge in the same way as misusing the SRG with get a catch. The difference is the downside of the catch with the SRG will be much greater than the catch with the bowl gouge. Bowl gouges don't get broken and bowl gouge catches rarely pull the wood off the lathe.
You have made two points.
Misuse of the tool causes the catch and
People often misuse the SRG
CONCLUSION : don't use the SRG on bowls....
expert turner can use whatever tools they wish because they never get catches.
We actually pretty much agree of the tool usage you described. I think you have 't been around enough bad turners to realize how much wood can drive onto the SRG.
With the wing of a bowl gouge the wood cannot dive onto the tool further than the bottom of the flute about 3/8" the width of the catch could be the length of the wing 3/4 " or whatever the length the wing is.With a 1 1/4 inch SRG on the inside of a bowl, at most you can get half of that width into the wood at one time. Same with the outside of a bowl. Even with a dead flat board, it is impossible to engage the entire cutting surface of the SRG. With a 1/2 inch gouge, with a swept back grind, you can get well over 1/2 inch of metal into the wood with your 'cutting with the wing' cut.
The SRG can engage the whole width of flute 1 1/4" when it catches and once the catch begin the wood could conceivably drive onto the whole length of the tool right up to the handle. However other bad things well before the tool can dig that deeply.
The SRG can scoop up a whole lot more wood mass that a bowl gouge
This video show getting a SRG catch with wood driving onto the whole flute. It was posted a while back
Exactly why we cannot reccomend the SRG for bowls.The problem with the SRG on bowls is that people tend to approach it with handle low, and bevel extended up. No one who turns much would ever approach a bowl with a scraper that way, any more than they would with a bowl gouge, no matter what grind is on the nose.
the above video uses this mistake to show why you should not use an SRG. I have run into many students who rough bowls with a bowl gouge this way. Somehow they mostly get away with it and they accept the occasional catch as part of the process.
In Stuart Batty's 7 Fundamentals video clip he states that Craft Supplies gets over 100 SRGs returned that are broken. He states that it is because the end grain causes the dig ins. Absolutely not! It has nothing at all to do with the wood grain. You can get the same dig in with any turning tool out there. It is presentation, and the fact that this is not taught properly. The SRG should be demonstrated as a 2 different type of cuts tool, instead of primarily the peeling cut.
Yes, we can never idiot proof any tool because we all know that as soon as you do, some one invents a better idiot...
robo hippy
You are absolutely correct misusing the bowl gouge in the same way as misusing the SRG with get a catch. The difference is the downside of the catch with the SRG will be much greater than the catch with the bowl gouge. Bowl gouges don't get broken and bowl gouge catches rarely pull the wood off the lathe.
You have made two points.
Misuse of the tool causes the catch and
People often misuse the SRG
CONCLUSION : don't use the SRG on bowls....
expert turner can use whatever tools they wish because they never get catches.
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