#  Dimensions and materials

### Grinding wheel dimentions

The number (drawing number) following the grinding wheel shape defines all its dimensions. Each dimension is preceded by a letter that identifies a specific dimension of the grinding wheel.

 | **D** | Diameter |
|---|---|
| **T** | Overall thickness |
| **H** | Bore |
| **U** | Thickness of the section |
| **X** | Depth of the section |
| **W** | Rim width |
| **V** | Face angle |
| **A** | Angle n°1 |
| **B** | Angle n°2 |
| **R** | Radius |
| **T1** | Reduced hub thickness |
| **U1** | Reduced thickness of the section |
| **E** | Thickness at bore |
| **K** | Inside recess diameter |
| **S** | Angle of body |
| **d** | Offset diameter from body |
| **J** | Hub diameter |
| **Dx** | Diameter of the second layer |
| **Ux** | Thickness of layer 2 |
| **Uz** | Thickness of layer 3 |
| **Wx** | Rim width layer 2 |
| **Wz** | Rim width layer 3 |
| **A1** | Clearance angle n°1 |
| **A2** | Clearance angle n°2 |
| **Rx** | Radius 2 |
| **Rz** | Radius 3 |
| **Kx** | Second inside recess diameter |
| **CL** | Keyway width |
| **BC** | Bolt circle |

###

 | ### Body material |

|---|

The two letters following the drawing number define the type of wheel body. The first letter indicates the material, while the second specifies the type of bond.

 | **AR** | Aluminium / phenolic bond |
|---|---|
| **MR** | Pressed aluminium (cup wheel) / phenolic bond |
| **PR** | Pressed aluminium / phenolic bond |
| **SR** | Steel / phenolic bond |
| **AP** | Aluminium / polyimide and hybrid bond |
| **CP** | Pressed copper / polyimide and hybrid bond |
| **XP** | Aluminium and Pressed Copper / polyimide and hybrid bond |
| **AM** | Aluminium / metal bond |
| **SM** | Steel / metal bond |
| **SH** | Steel / metal-vitrified bond |

### Modification of a dimension

This modification, engraved after the drawing number, allows us to adjust certain dimensions (e.g. the angle) and profile the grinding wheel according to the customer's requirements without creating a new drawing number.

 | **Gravage** | **Modification** |
|---|---|
| **V=23** | ![MODIF 3A1 V23](https://actionsuper.ch/images/Photos/gravage-modifcations/MODIF_3A1_V23.webp) |
| **V=113** | ![MODIF 3A1 V113](https://actionsuper.ch/images/Photos/gravage-modifcations/MODIF_3A1_V113.webp) |
| **V=23/2** | ![MODIF 3A1 V23 2](https://actionsuper.ch/images/Photos/gravage-modifcations/MODIF_3A1_V23_2.webp) |
| **V=113/2** | ![MODIF 3A1 V113 2](https://actionsuper.ch/images/Photos/gravage-modifcations/MODIF_3A1_V113_2.webp) |
| **A=23/4 B=60** | ![MODIF 3A1 A23 B60](https://actionsuper.ch/images/Photos/gravage-modifcations/MODIF_3A1_A23_B60.webp) |
| **A1=4 A2=2** | ![MODIF 3A1R A1 A2](https://actionsuper.ch/images/Photos/gravage-modifcations/MODIF_3A1R_A1_A2.webp) |
| **A=5** | ![MODIF 6A2 A5](https://actionsuper.ch/images/Photos/gravage-modifcations/MODIF_6A2_A5.webp) |
| **B=5** | ![MODIF 6A2 B5](https://actionsuper.ch/images/Photos/gravage-modifcations/MODIF_6A2_B5.webp) |