The diameter of the crossbeam’s central hole is designed to allow the operator to perform sampling operations as easily as possible, in addition to standard static and dynamic tests, while ensuring the integrity and strength of the crossbeam.
Pagani penetrometers in the TG series are available with two different drilling diameters; consequently, the centerers for the TG 63 model also differ from those for the TG 73 model.
A summary table of the diameters (CANNOT BE MODIFIED) is provided below:
| Model | Crossbeam hole diameter |
| TG 63-100 | 105 mm |
| TG 63-150 | 105 mm |
| TG 63-200 | 105 mm |
| TG 73-200 | 110 mm |