Wear-resistant crowns for heavy work are used on large machines when working with sand gravel and exploded rock. Maximum amount of wear-resistant material
| Wear-resistant crowns CATERPILLAR system J | ||||||
| Catalog number | Designation | L (mm) | B (mm) | H (mm) | K (mm) | Weight (kg) |
| 9N4353 | J350 | 253 | 95 | 113 | 75 | 10,8 |
| 9N4453 | J460 | 310 | 126 | 142 | 99 | 21 |