Piezoelectric Hemispheres & Focal Bowls
Hemispheres are available in two forms:- Unmachined, low cost, hemispheres with mechanical tolerances + 3% or 0.3mm whichever is greater. Fully machined hemispheres and focal bowls to standard, mechanical tolerances
Unmachined Hemispheres are available from existing tools in the following sizes:
| Outside Diameter | Wall Thickness |
| D / mm | T / mm |
| 11.0 | 2.25 |
| 14.0 | 2.7 |
| 23.5 | 2.5 |
| 25.5 | 3.0 |
| 26.1 | 4.0 |
| 29.4 | 3.0 |
Full machined hemispheres and focal bowls.
The size range achievable is as follows:
Outside Diameter Minimum 6.0mm Maximum 75.0mm
Inside Diameter Minimum 4.0mm Maximum 73mm
Standard sizes available:>
| Outside Diameter | Wall Thickness |
| D / mm | T / mm |
| 6.35 | 1.0 |
| 10.0 | 1.25 |
| 12.7 | 1.5 |
| 23.0 | 2.0 |
| 25.0 | 2.5 |
