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Thumbnail Filmstrip of Fowler 52-720-000 Surface Roughness Standards Set - 12535 Images
Fowler 52-720-000 Surface Roughness Standards - Complete Scale Set of 30 Specimens.
No. 52-720-000 Fowler's Surface Roughness Standards—ideal for checking, identifying and specifying by symbol the degree of roughness of machine parts—covers every machine method known and every obtainable value..- Features:
- Grade AA values are displayed in microinch and micron values.
- Quick, easy comparisons. Eliminates costly checking methods, saves time, reduces production of scrap caused by poor finishes.
- 30 specimens, each 7‚ÅÑ8" x 3‚ÅÑ8" in size, and made of electro-formed solid nickel.
- Each type of surface finish accurately and consistently reproduced to give operator a realistic idea of the feel, appearance and texture of the machined components.
- Includes instructions and vinyl wallet.
| Surface Finish | Number of Specimens | Micro Inches | Microns |
| Flat Lapping |
3 |
2, 4 & 8 | .05, .1 & .2 |
| Reaming |
3 |
16, 32 & 63 | .4, .8 & 1.6 |
| Grinding |
6 |
2, 4, 8, 16, 32 & 63 | .05, .1, .2, .4, .8 & 1.6 |
| Horizontal Milling |
6 |
16, 32, 63, 125, 250 & 500 | .4, .8, 1.6, 3.2, 6.5 & 12.5 |
| Vertical Milling |
6 |
16, 32, 63, 125, 250 & 500 | .4, .8, 1.6, 3.2, 6.5 & 12.5 |
| Turning |
6 |
16, 32, 63, 125, 250 & 500 | .4, .8, 1.6, 3.2, 6.5 & 12.5 |
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