Highland Park diamond sphere cups are designed from the segment up to cut and polish both soft and hard material fast. With over 10 years of R&D in diamond segment technology, our sphere cups set the standard for production sphere cutting.
Here is guide to selecting the right size cup:
| Cup Size Inch | Cups Size MM | Sphere Size Range Inch | Sphere Size Range MM |
| 1" | 25mm | 1" to 1.4" | 25 to 35.5mm |
| 1-3/16" | 30mm | 1.3" to 1.6" | 33 to 40.5mm |
| 1-3/8" | 35mm | 1.5" to 1.8" | 38 to 46mm |
| 1-9/16" | 40mm | 1.75" to 2.1" | 44.5 to 53mm |
| 1-3/4" | 44mm | 2" to 2.6" | 50.5 to 66 mm |
| 2-1/4" | 56mm | 2.5" to 3.1" | 63.5 to 78.5mm |
| 2-1/2" | 63mm | 2.8" to 3.5" | 71 to 90mm |
| 3" | 75mm | 3.4" to 4.1" | 86 to 104mm |
| 3-1/2" | 90mm | 4" to 4.9" | 101.5 to 124.5mm |
| 4" | 102mm | 4.6" to 5.5" | 117 to 140mm |
| 5" | 127mm | 6" to 8" | |
| 6" | 152mm | 7.25" to 9" |
NOTE: The resin diamond cups occasionally have small air bubble pockets that appear as part of the manufacturing process. This is only cosmetic and will not affect cup performance or lifespan