manost12 Posted March 20, 2018 Share Posted March 20, 2018 Hey Guys, since it's not easy to get a blob50 or any york dumbbell up here in germany (and silarukov is to expensive including shipping costs), I decided to make one on my own. Actually I let it manufacture for me because I dont have the equipment and for that I will provide a drawing. My question relates to the shape/curvature of the blob. I relatively new to this sport so I never had the chance to touch one and its quit hard to figure it out from images or videos. In the images attached you can see the blob with different radius on the sides. All measurements are in millimeter, dimensions i found on the board. So what do you think, which one is more identically to the original? Or am i completely wrong about the shape? I am really not sure and want to get as similar as possible to the original (based on shape, not weight). Any suggestions appreciated. I am also planning to make a lighter one, but i want to have a long time goal to feel in my hands. Thanks in advance. 1 Quote Link to comment Share on other sites More sharing options...
Andrew Dube Posted March 20, 2018 Share Posted March 20, 2018 I made an aluminum blob trainer last year. My dimensions are almost identical to your first drawing. Only difference is the radius was 226 mm. Here is my blob next to a blob50. 3 Quote Link to comment Share on other sites More sharing options...
manost12 Posted March 20, 2018 Author Share Posted March 20, 2018 Ok, thank you. Wasn't sure if it tends more to conus or convex shape. My only concern is that the radius I chose is to small and hence to hard to grip. What weight is your aluminium blob? Sth. around 15kg? Quote Link to comment Share on other sites More sharing options...
Andrew Dube Posted March 20, 2018 Share Posted March 20, 2018 1 hour ago, manost12 said: What weight is your aluminium blob? Sth. around 15kg? It's around 20lb or 10kg: exactly what I predicted when I did a volume to mass calculation. I have a loading pin and base screwed into one side with a baseplate so I can load it with weight plates. Quote Link to comment Share on other sites More sharing options...
manost12 Posted March 20, 2018 Author Share Posted March 20, 2018 Nice. I build a similar one out of wood where I can attach the loading pin on the bottom and on the side, so I can also do some facelifts with it. It's a bit slippery through the wooden surface but it works. Quote Link to comment Share on other sites More sharing options...
Florian Kellersmann Posted March 20, 2018 Share Posted March 20, 2018 The Blob50 and the Fatman Blob don't have the same shape. What are you looking exactly for? Quote Link to comment Share on other sites More sharing options...
manost12 Posted March 20, 2018 Author Share Posted March 20, 2018 You right I messed that up in my initial post. Actually I am looking for the Fatman blob shape. I have to admit I didn't now there is such a big difference since the blob50 is a pretty good replica of the Fatman, at least I thought?! Quote Link to comment Share on other sites More sharing options...
Alawadhi Posted March 29, 2018 Share Posted March 29, 2018 On 3/21/2018 at 1:51 AM, manost12 said: You right I messed that up in my initial post. Actually I am looking for the Fatman blob shape. I have to admit I didn't now there is such a big difference since the blob50 is a pretty good replica of the Fatman, at least I thought?! No. A pretty good replica of the 2nd generation blob. Not the first generation which is the fatman. 1 Quote Link to comment Share on other sites More sharing options...
Martin Gaisser Posted March 29, 2018 Share Posted March 29, 2018 Would the more pronounced convex shape on both sides make it any harder??? I know my blob50 and regular blob, not sure the generation, both have significantly less curvature on one side. I just got a loadable blob trainer from a friend and it has equal sides. Didn't know if that made it much harder or not. Quote Link to comment Share on other sites More sharing options...
manost12 Posted March 29, 2018 Author Share Posted March 29, 2018 I would think so. The more convex the sides are, the less "sharp" would be the edge and therefore harder to get a good grip I guess. At least from a theoretically viewpoint... Quote Link to comment Share on other sites More sharing options...
manost12 Posted March 29, 2018 Author Share Posted March 29, 2018 No problem. Here is my final drawing I handed out for manufacture. I adjusted the measurements for my needs, so they are not exactly as the dimensions I found at the board anymore (Had troubles to find affordable steel this size). Based on calculations the larger blob (left) will be around 23kg (dimensions similar as blob50), the smaller one around 19kg. I have no clue why the original blob has the same weight though it has a larger diameter. Maybe because of the flattend side on the bottom? Or my weight calculations are just wrong (hopefully not). I will post pictures and exact weights when I get them. 2 Quote Link to comment Share on other sites More sharing options...
insane.warrior Posted August 18, 2023 Share Posted August 18, 2023 @manost12 hi! I must say that this is an informative discussion and helpful photos Could I please ask you to share the results? What material did you use and what final weight was? Thanks in advance 3 Quote Link to comment Share on other sites More sharing options...
Fist of Fury Posted August 19, 2023 Share Posted August 19, 2023 On 8/18/2023 at 11:38 AM, insane.warrior said: @manost12 hi! I must say that this is an informative discussion and helpful photos Could I please ask you to share the results? What material did you use and what final weight was? Thanks in advance This calculator might be helpful for you: https://www.omnicalculator.com/math/volume 1 Quote Link to comment Share on other sites More sharing options...
insane.warrior Posted August 19, 2023 Share Posted August 19, 2023 27 minutes ago, Fist of Fury said: This calculator might be helpful for you: https://www.omnicalculator.com/math/volume Thanks! As for me, I have already come up with approximate calculations The bigger blob presented above should indeed weight about 23 kg if it’s made from steel. Quote Link to comment Share on other sites More sharing options...
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