Maryland Metrics Technical Data Chart:
Method of Indicating Surface Finish to DIN ISO 1302
Click for additional information on DIN 1302
- The latest DIN standard sheet version applies to all parts made to DIN standards.
- Variations on dimensions without tolerance values are according to "DIN ISO 2768-mk".
| Graphical symbol of surface finish to DIN 3141 | Roughness values, Ra, for permissible waviness height, Rt | |||
Assignation according to DIN 3141
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Meaning according to ISO 1302 | |||
(surface without graphical symbol) |
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Surfaces which do not need to meet specific requirements | ||
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even |
Surfaces which only have to meet requirements of general evenness and better appearance | ||
rough |
Individual raw surfaces which may be remachined | |||
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Clean raw surface with higher requirements | |||
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Surface with a roughness value which must not exceed the highest permissible medium roughness value | |
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all dimensions in mm