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How I Customized My Singer Heavy Duty Sewing Machine for Leather Stitching - The Granny Wheel Story

The Granny Wheel is compatible with all the Singer Heavy Duty sewing machine series: 85SCH, 4423, 4411, 4432, 4452, HD 6380, Model 64S and other sewing machines. In this video Rani tells the story of how and why he invented the Granny Wheel. In brief, it was after he purchased the Singer Heavy Duty 4432 sewing machine. He wanted to add stitching to his leather bracelets, straps, belts and dog collars, to upgrade them and make them more beautiful. The plan worked out and the sewing machine proved capable of sewing through the leather but Rani found a problem: the sewing machine's handwheel wasn't comfortable to turn. It was too small and hard to grip. He began to have wrist pains. To solve this problem Rani invented the Granny Wheel. He began to experiment with different designs using his 3D printer and manufactured many prototypes. Eventually, the final Granny Wheel took shape and today it is permanently fixed on his sewing machine, making his stitching and sewing so much easier and less tiring. To his surprise Rani found out that the Granny Wheel has even more benefits than he had realized. The main one was that he could now even sew without electricity - off Grid. He can now take his sewing machine out to his cabin in the woods or to his boat and continue sewing his bracelets. In the second part of this video Granny Wheels' Rani, who makes bag handles, guitar straps, belts, bracelets and dog collars, is taking the Singer Heavy Duty 4432 for a test run. We will try sewing full grain cow and buffalo butt and shoulder leather of different thicknesses and then analyze the results. It turns out that the Singer Heavy Duty does a fair job of sewing leather up to 9 ounces (3.7mm) ! But it's not all milk and honey; the machine is limited in thread thickness - we cannot use beyond thread #69. We will talk about the relationship between threads, needles, and the sewing machine and how to choose the correct thread and needle for your project CHAPTERS - you can use these to jump to a specific segment: 00:00 How the Granny Wheel was born 01:23 Granny Wheel designed on Tinker CAD 01:55 Granny Wheel printed with a Creality Ender 3D Printer 02:14 Final touches to the Granny Wheel - screwing, polishing 02:27 Sewing Granny Wheel jute pouch 02:37 Setting jute pouch snaps 02:59 Introducing the different types of leather we will try stitching with the Singer Heavy Duty Sewing machine: Cow and Buffalo butt and shoulder full grain leather straps of different thicknesses. 03:34 Stitching 2.4mm - 6 Oz cow butt leather 04:18 Stitching 2.7mm - 7 Oz buffalo butt leather 05:04 Stitching 3.3mm - 8 Oz cow shoulder 05:50 Stitching 3.7mm - 9 Oz cow butt 06:48 Analyzing the test results: The Singer Heavy Duty sewing machine stitched all the leather straps successfully but was at it's limit at 9 ounces thickness and struggled quite a bit. 07:12 Discussing relation between leather thickness, hardness and the ability of the sewing machine to penetrate the leather. 08:10 Talking about some of the common sewing machine problems like bird's nest, needle not penetrating, sewing machine jams, sewing machine going too fast. 08:43 Talking about the fact that the Singer Heavy Duty can cannot sew threads thicker than 0.3mm (size 69) with leather. This is because there are no corresponding leather needles to be found. This is disappointing because we would like thicker threads that are more strong and visible. 11:06 Granny Wheel stitching a leather strap demonstration. 11:18 Granny Wheel installation instructions. CAMERA: iPad Air 16G EDITING: Adobe Premiere Pro LIGHTING: Sunlight BACKGROUND MUSIC: https://www.FesliyanStudios.com BUY GRANNY WHEELS: Official website: https://www.grannywheels.com Etsy: https://www.etsy.com/il-en/shop/Grann... Amazon: https://www.amazon.com/dp/B0B6G7XVY6 VIDEOS: Singer Heavy Duty problems and fixes:    • Sewing Machine Problems Solved: Speed...   Off Grid Sewing Solution for Camper, Car, Truck, Boat or RV    • Granny Wheels Singer Heavy Duty 85SCH...   Needle and Thread Chart For Sewing Machines: https://www.tolindsewmach.com/thread-... SINGER Heavy Duty: 4432 Sewing Machine: https://www.amazon.com/SINGER-4432-St... Buffalo Leather (USA) : https://www.etsy.com/il-en/shop/Carve... Cow Leather (UK): https://www.etsy.com/il-en/shop/Leath... Nylon Bonded Thread #69: https://www.amazon.com/gp/product/B07... Schmetz Leather Machine Needle Size 18/110: https://www.amazon.com/gp/product/B00... Sewing Machine parts and accessories: https://www.sewingpartsonline.com/ Heavy Duty 6380 Sewing Machine: https://www.singer.com/heavy-duty-638...