How to choose the correct cardan shaft and its spare parts
To choose the correct category of a new cardan shaft we need to know the transmissible power to the equipment used according to the following table.
| Maximum Power (Kw) | Maximum Power (hp) | Torque (Nm) | |
| Category 1 | 13 | 18 | 228 |
| Category 2 | 18 | 24 | 317 |
| Category 4 | 31 | 42 | 547 |
| Category 5 | 42 | 57 | 748 |
| Category 6 | 51 | 69 | 900 |
| Category 8 | 71 | 96 | 1250 |
| Category 10 | 109 | 148 | 1918 |
| Category 12 | 136 | 184 | 2400 |
| Category 14 | 187 | 254 | 3300 |
To recognize the category of a cardan shaft and identify its spare parts, we need to measure the spider with maximum precision by taking measurements A and B in millimetres.
| A=22 x B=54 | A=23,8 x B=61,2 | A=27 x B=70 | A=27 x B=74,6 | |
| Albero Cardanico | Category 1 | Category 4 | ||
| Cruise | Category 1 | Category 2 | Category 3 | Category 4 |
| Fork for Inner tube | Category 1 | Category 2 | Category 3 | Category 4 |
| Fork for Outer Tube | Category 1 | Category 2 | Category 3 | Category 4 |
| Grooved fork 1″ 3/8 Z=6 | Category 1 | Category 2 | Category 3 | Category 4 |
| Inner Tube Joint 1″ 3/8 Z=6 | Category 1 | Category 2 | Category 3 | Category 4 |
| External Pipe Joint 1″ 3/8 Z=6 | Category 1 | Category 2 | Category 3 | Category 4 |
| A=30,2 x B=80 | A=30,2 x B=92 | A=35 x B=94 | A=35 x B=106,5 | |
| Albero Cardanico | Category 5 | Category 6 | Category 8 | |
| Cruise | Category 5 | Categoria 6 | Category 7 | Category 8 |
| Fork for Inner tube | Category 5 | Category 6 | Category 7 | Category 8 |
| Fork for Outer Tube | Category 5 | Category 6 | Category 7 | Category 8 |
| Grooved fork 1″ 3/8 Z=6 | Category 5 | Category 6 | Category 7 | Category 8 |
| Inner Tube Joint 1″ 3/8 Z=6 | Category 5 | Category 6 | Category 7 | Category 8 |
| External Pipe Joint 1″ 3/8 Z=6 | Category 5 | Category 6 | Category 7 | Category 8 |
