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Development and production of components for machine tools since 1949.
Our way wipers are available in different shapes and materials, depending on the application and type of application. The main categories available in our catalog include:
The choice of material is essential to ensure durability, scraping effectiveness and compatibility with the working environment:
| Material | Typical applications | Notes |
|---|---|---|
| NBR Nitrile Rubber | Mineral lubricating oils, standard applications | Good abrasion resistance in lubricated environments |
| NBR + PTFE | Dry or poorly lubricated applications | Anti-friction coating available |
| FKM (Viton®) | Presence of aggressive chemical agents | High chemical resistance, use in critical environments |
To obtain an effective and long-lasting scraping, it is essential to respect some basic rules during assembly:
| Problem | Possible cause | Recommended action |
|---|---|---|
| Failure to scrape | Insufficient or no preload | Check preload along the entire guide and compatibility of the way wipers/guide and centering + parallelism between the moving parts of the machine |
| Tear of the lip | Excessive preload or incorrect direction of the lip | Check preload along the entire guide and compatibility of the way wipers/guide and centering + parallelism between the moving parts of the machine |
| Lip swelling | Chemical incompatibility between rubber and fluids/washes | Check the composition of the fluids and contact the manufacturer for support |
| Rapid lip abrasion | Dry running with unsuitable material | Choose a material suitable for dry operation (e.g. NBR+PTFE) |
The ISO 3302-1 standard represents the international reference standard for defining dimensional tolerances rubber products, such as gaskets, seals and moulded parts.
Its objective is to ensure the consistency, reliability, and correct functioning of components, taking into account the specific characteristics of elastomeric materials and production processes.
The directive introduces different tolerance classes (M1, M2, M3 and M4), which allow the most suitable precision level to be defined based on the application, the context of use and the functional requirements of the component. A correct interpretation of classes and tolerances is fundamental to avoid critical issues during assembly, operation and long-term durability.
For this reason, in addition to the regulatory reference, Technical support plays a central roleSupporting the client in reading the standards, choosing the most suitable tolerance class and evaluating technical solutions allows for the reduction of errors, optimisation of the project and assurance of reliable performance.
Below are the main differences between tolerance classes and the reference table, useful as a technical guide for informed evaluation.
Class M1
It is the class with the most restrictive dimensional limits, used when high levels of precision and repeatability are required, typically in technically critical applications.
Class M2
It represents a good compromise between accuracy and production feasibility and is the most used in standard industrial applications, where reliability is required without excessively stringent tolerances.
Class M3
It allows for wider tolerances and is intended for components with less stringent functional requirements, where slight dimensional variations do not affect overall performance.
M4 Class
It is the class with the most permissive tolerances, generally adopted for non-critical or highly deformable elements, for which dimensional accuracy is not a determining factor.
| Nominal size (mm) | Tolerance Class M1 (mm) | Tolerance Class M2 (mm) | Tolerance Class M3 (mm) | Tolerance Class M4 (mm) |
|---|---|---|---|---|
| 0.00 - 4.00 | ± 0.08 | ± 0.10 | ± 0.15 | ± 0.25 |
| 4.00 - 6.30 | ± 0.10 | ± 0.12 | ± 0.20 | ± 0.25 |
| 6.30 - 10.00 | ± 0.10 | ± 0.15 | ± 0.20 | ± 0.30 |
| 10.00 - 16.00 | ± 0.15 | ± 0.20 | ± 0.25 | ± 0.40 |
| 16.00 - 25.00 | ± 0.20 | ± 0.20 | ± 0.25 | ± 0.50 |
| 25.00 - 40.00 | ± 0.20 | ± 0.25 | ± 0.35 | ± 0.60 |
| 40.00 - 63.00 | ± 0.25 | ± 0.35 | ± 0.50 | ± 0.80 |
| 63.00 - 100.00 | ± 0.35 | ± 0.40 | ± 0.60 | ± 1.00 |
| 100.00 - 160.00 | ± 0.40 | ± 0.50 | ± 0.70 | ± 1.30 |
| 160.00 - | ± 0.30% | ± 0.40% | ± 0.50% | ± 0.70% |