Solids Of Constant Width Sets- Large size Phone Stand We have upgraded the pin

We have upgraded the pin material to a higher alloy 8620 steel for longer durability

This item qualifies for a shipping cost refund when purchased with the complete kit

All items are proudly made in Canada using North American materials whenever possible

there’s no need to manually rotate each roller to apply grease to your pins

Solids Of Constant Width Sets- Large size Phone Stand We have upgraded the pinSet of Cones of constant width. This model is the large size. CNC machined in Canada out of brass or aluminum bar stock. Approximately 1. 75" in diameter. These are machine finished and light hand polishing is done. 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.