ASTM A193/A193M B7M All Threaded Stud Bolts
Alloy steel bolting for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.
Standard: IFI-136, ASME B16.5, DIN976
Inch Size: 1/4”-4” with various lengths
Metric Size: M6-M100 with various lengths
Other Available Grade:
ASTM A193/A193M B7, B7M, B16 B8 Class 1 & 2, B8M Class 1 & 2,
ASTM A320/A320M L7, L7M, L43, B8 Class 1 & 2, B8M Class 1 & 2, and so on.
Finish: Plain, Black Oxide, Zinc Plated, Zinc Nickel Plated, Cadmium Plated, PTFE etc.
Packing: Bulk about 25 kgs each carton, 36 cartons each pallet
Advantage: High Quality and Strict Quality Control, Competitive Price,Timely Delivery; Technical Support, Supply Test Reports
Please feel free to contact us for more details.
The balance of forces is very precarious. The dexterity is very inportant, and also very important to have time and patience. I spent two days to find the right balance of all the elements. Shape and weight of the spinner, alignment of the magnet base perfectly level, align the axes of the two ring magnets. For me it was the most challenging experiment done so far.
the top is made with a pencil, cut into 3.3 cm. on the tip of the pencil I glued a piece of aluminum foil. To fit the ring I used thick rubber made from an inner tube of a bicycle, but thickness can also doing many turns of electrical tape. To add weight, I attached magnetically 3 washers iron magnetic ring.
Pay attention to detail, this experiment is not easy. A tape around more or less change the weight of very little but can make the difference.
More info about this experiment here
https://www.supermagnete.com/Magnet-applications/Levitron-Levitating-spinning-top
For this experiment I used these two magnetic rings.
https://sumag.net/r-27-16-05-n-x01
https://sumag.net/fe-r-100-60-20-x01