Hoffman Scratch Hardness Tester
The Hoffman Scratch Hardness Tester was developed for the comparative evaluation of scratch resistance and adhesion of many types of coatings.
- Simple pocket size tester
- Ideal for field use and demonstrations
This instrument consists of a four-wheeled carriage, a scale arm graduated from 0-20 that is attached permanently to the carriage in a counterpoised condition about the pivot axis, and a scratch tool with a sharp circular rim mounted at 45° to the flat test surface.
Standards:
| GE Aircraft Engine Group Spec. |
E50TF61-S1 |
| Naval Lab Spec. | WS12858 Part 4.5.5 Härte |