Rigid Grinding Discs
Aka-Allegran, available in 4 different versions, is recommended for fine grinding materials harder than 150 HV and Aka-Largan is recommended for fine grinding materials softer than 150 HV.
Aka-Allegran 9 provides perfect planeness and edge retention. It is the hardest disc in the range and recommended for fine grinding materials harder than 450 HV. It replaces grinding papers P320-P1200. This grinding disc should be used with diamond suspension 15 – 3 µm.
Aka-Allegran 6 is recommended when an optimal balance between material removal and fine surface finish is required. It is the most universal disc in the range. It provides fast fine grinding of most materials with a hardness of above 150 HV with 9 - 3 µm diamonds. It will replace the traditional grinding steps from P320 - P1200 with one single step.
Aka-Allegran 3 provides very short preparation times, perfect planeness and retains soft phases (e.g. soft inclusions in steel). It is a medium hard disc and recommended for fine grinding materials harder than 150 HV. It replaces grinding papers P320-P1200. Aka-Allegran 3 should be used with diamond suspension 9 – 3 µm.
Aka-Allegran 1 provides outstanding flatness. It is the softest disc in the range and recommended for materials harder than 150 HV. Aka-Allegran 1 should be used with diamond suspension 1 – 0.1 µm. This disc can also be used for final polishing of very hard materials and coatings.
Aka-Largan 9 provides perfect planeness and edge retention for materials softer than 150 HV (it can be used for materials with a hardness between 50-400 HV). It should be used with diamond suspension 15 – 3 µm. Aka-Largan is the optimal choice for fine grinding of soft and very soft materials.
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FAQ:
Can a rigid grinding disc be used for other preparation step(s) than fine grinding?
Rigid grinding discs are usually only used for fine grinding. However, for very hard materials like sintered carbides or certain ceramics our Aka-Allegran 1 can be used with 1 µm diamond suspension for a final polishing step. This step guarantees maximum planeness and perfect edge retention, especially important for sintered carbide with very thin coatings.
What is the difference between a rigid grinding disc and a lapping disc?
Why are there so many different rigid grinding discs?
In a rigid grinding disc, the abrasive grains/diamonds from the diamond suspension become embedded into the disc surface for the best possible grinding action. To get a high removal with hard materials the diamonds should only be pressed slightly into the surface of the disc and a relatively hard disc is therefore used. For softer materials, the diamonds must be embedded deeper into the disc, otherwise they will be embedded into the sample. Therefore, we offer 5 different rigid grinding discs to cover materials with all different hardness.