Exactly as Agreed
Plastic machining places high demands. Plastic is affected by many factors, such as temperature and humidity, as well as the condition of the cutting tools and the machines.
Workpieces at OTV are machined and inspected at a temperature of 20–22°C. Subsequent assembly or inspection measurement at our customers’ sites should therefore generally always be carried out at the same temperature to avoid unnecessary influence on the plastic component.
To ensure that OTV meets the requirements for dimensions and tolerances, each cutting tool is measured for wear and tolerances before use.
Tolerances
As standard, we use ISO 2768-1 (medium), unless otherwise specified or agreed.
Surface Roughness
We have listed possible surface roughness values for different plastic types.
However, this is for guidance only, and our technical department should be contacted for further information.
| RA 0.4 – 1.0 | Very fine surface finish that requires a long machining time |
| Material: PETP and POM | |
| Tool requirements: Diamond-coated tool | |
| RA 1.6 – 3.2 | Good surface finish achieved by milling and turning |
| Material: Almost all engineering plastics | |
| Tool requirements: No special requirements | |
| RA 3.2 – … | Saw-cut surface |
| Material: Almost all engineering plastics | |
| Tool requirements: No special requirements |
Plastic Expert
We are experts in plastics, so please contact us if you are unsure or have a question.