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Sharpening turning tools

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Forum topic by MedicKen posted 07-30-2011 07:52 PM 1122 views 0 times favorited 10 replies Add to Favorites Watch
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MedicKen

1610 posts in 2922 days


07-30-2011 07:52 PM

I am just getting starting turning and have a question about sharpening the tools involved. I have a grinder that is outfitted with the Wolverine jig. I have watched the video that came with the jig and it all looks pretty straight forward, well almost. The video does a fair job of explaining the jig and how its used with fairly new chisels. My problem is the tools I have acquired are AFU. Meaning, the bevel angles are not consistent and not even close to what I have read they should be. Is there a trick to setting the angles and what have you found to be the optimum for the varying tools?

-- My job is to give my kids things to discuss with their therapist....medic20447@gmail.com


10 replies so far

View CharlieM1958's profile

CharlieM1958

16241 posts in 3678 days


#1 posted 07-30-2011 07:57 PM

I guess you could find a reference chart somewhere, but what I’ve seen from experienced turners is that there is a lot of personal preference involved.

-- Charlie M. "Woodworking - patience = firewood"

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WayneC

12642 posts in 3557 days


#2 posted 07-30-2011 08:03 PM

Angles vary from tool to tool. I have seen some charts in wood turning books and their are videos on the topic. I have also seen jigs that are used set up the arm and varigrind positions. I linked a commercial version, but similar stuff can be shop made.

http://www.woodturnerscatalog.com/store/Sharpening___Universal_Jigs___Raptor_Set_Up_Tool___raptor?Args=

-- We must guard our enthusiasm as we would our life - James Krenov

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David Kirtley

1286 posts in 2458 days


#3 posted 07-30-2011 08:53 PM

The angles also vary for the material you are turning. If you turn really hard stuff, they get a steeper angle. Softer stuff gets a finer angle. The way you hold the tool makes a difference as well.

The real answer it to turn with them. The bevel is the clearance angle. If you want it to cut and all you are getting is scraping or it is skipping off the cut on the bevel, try a bit finer bevel angle. If you are getting too many hangs or losing the edge too fast, you might try with a higher angle.

-- Woodworking shouldn't cost a fortune: http://lowbudgetwoodworker.blogspot.com/

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mpax356

67 posts in 1952 days


#4 posted 07-30-2011 10:21 PM

For a bowl gouge I would start at 50 to 60 degrees. As you gain experience you might vary it. You might try about 40 degrees on your spindle gouge. The key to using the vari grind is understanding what you want your profile to look like. Sharpening turning tools is not intuitive. I recommend you check find a local chapter of the American Association of Woodturners. You will much more easily and safely climb that learning curve with a few hours with an experienced turner. You can find a local chapter here
http://www.woodturner.org/community/chapters/LocalChapters.asp
I see there is one in Bakersfield.

-- MPax, Atlanta

View ChesapeakeBob's profile

ChesapeakeBob

365 posts in 2943 days


#5 posted 07-31-2011 05:42 PM

MedicKen… I give up… what is “AFU?”

-- Chesapeake Bob, Southern Maryland

View WayneC's profile

WayneC

12642 posts in 3557 days


#6 posted 07-31-2011 05:47 PM

Bob AFU = All (4 letter word beginning with F) Up

-- We must guard our enthusiasm as we would our life - James Krenov

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ChesapeakeBob

365 posts in 2943 days


#7 posted 07-31-2011 05:51 PM

Thanks Wayne. I was not thinking of engineering terms. LOL!

-- Chesapeake Bob, Southern Maryland

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WayneC

12642 posts in 3557 days


#8 posted 07-31-2011 06:00 PM

Yup. It is a very precise term used to describe a number of very specific conditions. You clearly know when it applies.

-- We must guard our enthusiasm as we would our life - James Krenov

View Bluepine38's profile (online now)

Bluepine38

3341 posts in 2545 days


#9 posted 07-31-2011 07:30 PM

Unfortunately in usually applies to me with a prefix SNAFU indicating Situation Normal AFU, at least I am
serving as good bad example of do as I say not as I do. This is a term that was in general usage in the
military a few (OK more than a few) years ago.

-- As ever, Gus-the 77 yr young apprentice carpenter

View lcurrent's profile

lcurrent

123 posts in 3275 days


#10 posted 08-05-2011 10:01 PM

cr1 Got it nailed on the button

-- lcurrent ( It's not a mistake till you run out of wood )

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