croessler Posted January 3, 2012 Report Share Posted January 3, 2012 My Mother in-Law wanted a really big Salad bowl for Christmas..... This is the result. It started life as a 24x20x4 blank of African Mahogany;Here I am flattening a face to attach the sacrificial block. Nearly Done! Finished End Result = 19.5" x 3.75" Quote Link to comment Share on other sites More sharing options...
duckkisser Posted January 4, 2012 Report Share Posted January 4, 2012 looks nice wouldnt mine having one for myself. Quote Link to comment Share on other sites More sharing options...
jimmykx250 Posted January 4, 2012 Report Share Posted January 4, 2012 So how did u turn this. Is that a glue block holding it? Are those really strong enough? Really nice work-I would love to own that as well! Quote Link to comment Share on other sites More sharing options...
croessler Posted January 4, 2012 Author Report Share Posted January 4, 2012 Yes, that is a glue block and it is more than strong enough to hold it. As example, when I was ready to cut it away in order to separate the bowl the tool caught and was nearly bent into a U-shape. Strong enough? On another note this was also my first time using Potassium Dichromate to age/darken a piece.... Quote Link to comment Share on other sites More sharing options...
duckkisser Posted January 4, 2012 Report Share Posted January 4, 2012 where do you get potassium dichromate..........does it have a common name i might want to try that sometime. Quote Link to comment Share on other sites More sharing options...
TimV Posted January 4, 2012 Report Share Posted January 4, 2012 Hi Chris, Great job! What glue did you use to secure the glue block? Quote Link to comment Share on other sites More sharing options...
croessler Posted January 5, 2012 Author Report Share Posted January 5, 2012 Duckkisser, I purchased mine on Ebay; You can get it in smaller amounts that way. I started my investigation into it following David Marks' web page on the subject. I used 1/4 tsp per cup of water. I recommend experimenting with it a bit first; a little goes a long way. Also, this is the common name. I recommend buying in smallish amounts (a few ounces) at a time. A pound of this would last a life time unless your a production furniture maker. Quote Link to comment Share on other sites More sharing options...
croessler Posted January 5, 2012 Author Report Share Posted January 5, 2012 TimV, I had used TiteBond III. The real issue is that I forgot to use a piece of craft paper between the block and the turning blank. This usually makes it easier to remove. The grain on the block was in line with the grain on the blank making the strongest bond possible between the two pieces. Not to mention I used a piece of Maple as it was the only smallish piece I had laying around; my parting tool suffered a sad fate because of this choice. However, that piece was not going to prematurely separate! Quote Link to comment Share on other sites More sharing options...
TimV Posted January 5, 2012 Report Share Posted January 5, 2012 Great thanks. Would you have considered using CA on such a large platter? How did you clean up the foot after separation from the glue block? Quote Link to comment Share on other sites More sharing options...
duckkisser Posted January 5, 2012 Report Share Posted January 5, 2012 craft paper hmmmmmm wonder why that makes it easer to remove. going to try that in a few days. Quote Link to comment Share on other sites More sharing options...
croessler Posted January 6, 2012 Author Report Share Posted January 6, 2012 Well.... You are supposed to apply glue to the turning blank then apply the paper; after this you set the sacrificial block in place and clamp it down it some manner. There will be adhesion due to glue that soaks through the paper but you do not get a full bond like I did. Quote Link to comment Share on other sites More sharing options...
croessler Posted January 6, 2012 Author Report Share Posted January 6, 2012 Tim, I have found that the CA is just to brittle to hold up on a larger piece. It will break away.... Quote Link to comment Share on other sites More sharing options...
duckkisser Posted January 6, 2012 Report Share Posted January 6, 2012 how do you like turning mahogany i tried a few small lengths and it seems to rip as much as it cuts. did you find it did that for your bowl as well before you sanded it smooth? Quote Link to comment Share on other sites More sharing options...
croessler Posted January 6, 2012 Author Report Share Posted January 6, 2012 I enjoy turning Mahogany... The key thing I have found is that it turns much like Cherry in that when you hit the end grain sections it can tear out pretty easily. The only recourse I have found is keeping the tools very sharp. On this blank I tried the Easy Wood Tools with carbide cutters and did not get the same amount of tear out. Also, keep in mind that this is African Mahogany and is harder / denser than "real" Mahogany. Quote Link to comment Share on other sites More sharing options...
duckkisser Posted January 8, 2012 Report Share Posted January 8, 2012 ya from what i understand the south american mahogany is softer then african.......its very light as well almost like cedar. has similar texture, and grain to it. Quote Link to comment Share on other sites More sharing options...
croessler Posted January 9, 2012 Author Report Share Posted January 9, 2012 You pretty much nailed it! Only traditional Mahogany is less like Cedar and more like Cherry in it behavior. Cedar has a tendency to splinter (in my opinion). Quote Link to comment Share on other sites More sharing options...
duckkisser Posted January 9, 2012 Report Share Posted January 9, 2012 i found out the hard way but it still worked out i ruffed it out and it was soft enough that i just sanded it to shape after wards with a old broken sanding belt. Quote Link to comment Share on other sites More sharing options...
susieq4131 Posted January 10, 2012 Report Share Posted January 10, 2012 My Mother in-Law wanted a really big Salad bowl for Christmas..... This is the result. It started life as a 24x20x4 blank of African Mahogany;Here I am flattening a face to attach the sacrificial block. Nearly Done! Finished End Result = 19.5" x 3.75" That is gorgeous! I want that piece and your lathe! SQ Quote Link to comment Share on other sites More sharing options...
croessler Posted January 14, 2012 Author Report Share Posted January 14, 2012 I'm sorry but you can't have my lathe! It's my favorite power tool! Quote Link to comment Share on other sites More sharing options...
Standing Tall Posted June 19, 2012 Report Share Posted June 19, 2012 Nice looking work. I do quite a bit of stain work with the potassium dichromate and local mahogany. A good handful of my work I use this on to achieve the finishes on the antiques and replicas down here in the caribbean. Started turning some bowls a while back and sure is a lot of fun. Anyways like I was saying nice work. Here is a 22" bowl on top of a 20x20 butcher block I made both out of local mahogany. 1 Quote Link to comment Share on other sites More sharing options...
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