Bill's Ball Bearing Burr

DESIGNER: Bill Cutler
MATERIAL: Jatoba, Stainless Steel
RELEASE DATE: 8.6.2019
EDITION: 75 Copies Released
SIZE: 3"

Bill's Ball bearing burr is one of my all-time favorite interlocking puzzles. The normal six-piece assembly is further complicated by the addition of two stainless ball bearings which must be placed in the correct location before assembly. The bearings are then released once the puzzle is assembled, and the solver must figure out how to maneuver them in order to disassemble the puzzle. A very unique concept and a must-have for your collection!

Fit and finish is excellent with this puzzle, which was realized with .88" stock to precisely accommodate the bearings. All tolerances are within several thousandths of an inch, with decorative end-grain bevels on the dense Jatoba used.

75 copies made for sale, each signed and dated. This puzzle is shipped assembled.

This item is sold out and no longer available. Our Marketplace is the best source for discontinued work. We occasionally revisit discontinued designs at our sole discretion and do not accept requests or one-off commissions.

To ensure the proper continued operation and fit of your puzzles, please check out our product care guide. We recommend an occasional polishing with Rennaisance Wax to keep wood puzzles in top condition.

Customer Reviews

Based on 4 reviews
Eric C.
Unique Puzzle

Where did those ball bearings come from!? And where do they go now? The burr itself might not puzzle too many puzzlers, but those ball bearings sure throw a wrench in your plans. Great puzzle, and a very satisfying solve once you get there.

Fredrik S.
Wonderful puzzle

This one is love at first touch. The balls provide such nice locking of the whole thing. Perfect fit of all pieces and a good level of difficulty.

Frank R.
A very nice BBBB Puzzle

After assembly I tried now to open this tricky burr, without success. Is is not only made very fine, but also originally - including hidden two balls, which are desturbing us to solve the task and reassemble the burr. Congratulation, Eric, a superb idea to remake this puzzle, suddenly my burr opened, moving some pieces, and it was not clear how, something like magic ?

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