Solids Of Constant Width - Heptagon- Set of 3 Phone Stand 10 - Bolts with grease

10 - Bolts with grease fitting (new version with protection)

5 cross hole centres (7100963)

it is suggested to increase to 20 tons

with replacements available

it is no longer considered suitable for achieving a satisfactory experience

Solids Of Constant Width - Heptagon- Set of 3 Phone Stand 10 - Bolts with greaseSet of three Cones of constant width. This model is based on a Heptagon. CNC machined in Canada out of brass or aluminum bar stock. Approximately 1" in diameter. These are non spherical solids that amazingly have constant width in every directionallowing them to roll smoothly. They are derived from two dimensional curves that were put into use by the 19th century German engineer Franz Reuleaux.