The Hyperboloid Burr is a six-piece burr puzzle made from identical hyperboloid pieces. It was designed by Oskar van Deventer with the help of Naoaki Takashima.
With Oskar's permission Ali & Steve recreated the puzzle in Brass. The six piece version of the puzzle assembles and displays well, but if picked up by a single piece falls apart under its own weight. Each piece is 1.6in long, has a diameter of .75in and weighs 17oz. The assembled seven piece puzzle has a nice heft to it, weighing in at about three quarters of a pound.
The seven piece assembly is completed with a satisfying "click" and holds together well - it's a fidgit toy in its own right. It turned out the tolerances for this puzzle were absolutely critical. A mere 0.03mm tighter or looser and the seven piece version of the puzzle either does not assemble or falls apart! The pictures contain no spoilers, neither the six piece or seven piece assembly is shown and the puzzle ships disassembled.
Designed by Two Brass Monkeys: Ali Morris and Steve Nicholls