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Maple Burl Shot Glass

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Project by Dave Church posted 04-26-2016 03:04 PM 717 views 0 times favorited 7 comments Add to Favorites Watch

I found a few trees in my woods that had what I believe is black knot disease, and were dropping these burls on the ground. I gathered a few up to turn on the lathe. The first one I tried broke apart so I decided I needed to cast them in some sort of resin. I picked up this Easy Cast and it worked wonderfully. This was only my second ever project on the lathe. I love how it turned out, but was a bit disappointed with how out of round the shot glass became while sanding. I have since slowed down the turning speed while sanding and it has helped (also using the shot glass helped with my disappointment), but if anyone has any other advice please share. Thanks.

-- What? I didn't "break" it, I was just testing its durability, and then I "placed" it in the woods because it's made of wood and I just thought he should be with his family.





7 comments so far

View LesB's profile

LesB

1263 posts in 3047 days


#1 posted 04-26-2016 05:14 PM

Interesting project. I hope you wore a good dust mask while turning and sanding the epoxy.
Could the “out of round” problem have been moisture in the wood? During sanding the piece probably got warm and lost moisture causing it to deform. That would probably have happened later regardless as the piece dried out over time.
One method for avoiding this is to partially turn the piece but leaving it fairly thick, then use a microwave oven to dry the wood out. There are numerous “how to” videos and guides already on the internet so I won’t describe it here. If you have any questions you can contact me. It takes a few heating and cooling processes to do it…especially on a larger piece and you may have to do it when the wife isn’t around (LOL). Then if it gets out of round in the drying process you can true it up while finishing the turning.
By the way, super glue is another good product to repair and make small patches in turnings. I use the medium or thick type. It can fill small voids and if used in small cracks early in the turning it can prevent them from getting larger.

-- Les B, Oregon

View Dave Church's profile

Dave Church

15 posts in 1385 days


#2 posted 04-26-2016 06:04 PM

The out of round happened within a few minutes while sanding so I think it is very unlikely it was due to moisture. I believe it has something to do with sanding different hardness materials. My thought is that the casting material is pretty soft and very easy to remove a lot of material while sanding, while the wood is a little harder and doesn’t remove as much. Reducing the RPM’s seemed to help this problem because while sanding at high speeds it is impossible to keep consistent pressure. When spinning too fast your hand naturally oscillates with the non uniform materials, which creates repeating points of higher pressure and lower pressure (almost in a bouncing motion). This tends to take more material off during the high pressure section and less off during the low pressure section. In very little time, my glass had one side that was very thin and one side that was much thicker. I was curious to see if anyone else has this problem.

Thanks for the moisture control advise though, that is a separate issue I’ve been running into. It seems pretty straight forward to fix.

-- What? I didn't "break" it, I was just testing its durability, and then I "placed" it in the woods because it's made of wood and I just thought he should be with his family.

View Bill's profile

Bill

404 posts in 1753 days


#3 posted 04-26-2016 08:36 PM

That looks awesome! Well done. What did you use for your mold?

-- Putting the "mental" in experimental since 1973

View Dave Church's profile

Dave Church

15 posts in 1385 days


#4 posted 04-26-2016 08:45 PM

I just used a wax paper cup and ripped it off after the resin was set.

-- What? I didn't "break" it, I was just testing its durability, and then I "placed" it in the woods because it's made of wood and I just thought he should be with his family.

View Ken90712's profile

Ken90712

17255 posts in 2793 days


#5 posted 04-26-2016 10:25 PM

Love it, great find….

-- Ken, "Everyday above ground is a good day!"

View helluvawreck's profile

helluvawreck

25316 posts in 2471 days


#6 posted 04-27-2016 01:42 PM

That is a beautiful piece.

helluvawreck aka Charles
http://woodworkingexpo.wordpress.com

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

View leafherder's profile

leafherder

1069 posts in 1557 days


#7 posted 04-27-2016 01:47 PM

Great job – and it is not out of round if you make people take a shot before examining it too closely – if they notice AFTER the drink they just can’t handle their liquor. LOL
Thanks for posting, I will have to look for some of those burls on my next walk in the woods.

-- Leafherder

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