Fineness of Grind Gages
BYK-Gardner offers grind gages in accordance with ISO and ASTM methods.
- Robust grind gage block made of high-quality stainless steel
- Single or dual channel designs
- Different lengths and widths
- Different scales: Microns, Hegman, Mils, NPIRI
Many types of solid materials must be ground or milled into finer particles for dispersion in appropiate liquid vehicles. The degree of dispersion influences the physical and optical properties of the coating.
The Fineness of Grind Gage is used to indicate the fineness of grind or the presence of coarse particles or agglomerates in a dispersion. It does not determine particle size or particle size distribution.
Grind gages are used in controlling the production, storage, and application of dispersion products produced by milling in the paint, plastic, pigment, printing ink, paper, ceramic, pharmaceutical, food, and many other industries.
The Fineness of Grind Gage is a flat steel block in the surface of which are two flat-bottomed grooves varying uniformly in depth from a maximum at one end of the block to zero near the other end. Groove depth is graduated on the block according to one or more scales used for measuring particle size.
BYK-Gardner offers a comprehensive range of grindometers with different scales, number of channels, lengths and widths of the channels as well as block sizes. The Grindometers are delivered in reusable protective packaging.
Most gages will have one scale marked in either mils or microns.
1 mil = 25,4 μm
1 mil = 0,001 inch
1 μm = 0,001 mm
The Hegman scale or National Standard scale may be abbreviated “NS” on the gage. The scale ranges from 0 to 8 with numbers increasing as the particle size decreases:
0 Hegman = 4 mil / 100 μm Korngröße
4 Hegman = 2 mil / 50 μm Korngröße
8 Hegman = 0 mil / 0 μm Korngröße
Standards:
| ASTM | D333 | D1210 | D1316 | D6846 |
| ISO | 1524 | |||
| FTMS | 141a, Method 4411.1 |