Metric variable speed belts are special drive belts designed according to DIN (Deutsches Institut für Normung) standards, ensuring uniform dimensions and interchangeability across manufacturers. DIN metric variable speed belts are standardized, high-strength belts that fit variable pitch pulleys, allowing smooth speed adjustment in industrial and mechanical systems.
- Design :
- Wider, flat-to-trapezoidal cross-section for smooth engagement with variable speed pulleys .
- Constructed with strong tension cords (e.g., polyester, aramid) to resist stretching.
- Rubber or synthetic compounds provide flexibility, heat resistance, and long service life.
- DIN Standardization :
- Specifies dimensions, tolerances, and performance requirements for belts.
- Common DIN designation format: “W” profile + top width (mm) (e.g., W16, W22, W31.5).
- Ensures compatibility between belts and pulleys of different brands.
- Function : Works with variable pitch pulleys (sheaves that open/close), changing the belt’s running diameter to continuously vary the output speed .
- Applications :
- Machine tools (lathes, milling machines, drill presses).
- Textile machinery.
- Industrial fans, pumps, compressors.
- Agricultural equipment.
- Advantages :
- Standardized (DIN) sizes → easy replacement.
- Smooth, stepless speed adjustment.
- High torque capacity and long service life.
Common DIN Metric Variable Speed Belt profiles (DIN 7753 Part 1 & 2 are the key standards):
| Profile (DIN) | Top Width (mm) | Height (mm) | Typical Angle | Notes |
|---|---|---|---|---|
| W 13 | 13 | 5 | 40° | Narrowest type, for low-power drives. |
| W 16 | 16 | 5 | 40° | Light-duty machinery, compact systems. |
| W 22 | 22 | 8 | 40° | Standard for medium-power machine tools. |
| W 31.5 | 31.5 | 10 | 40° | Heavy-duty drives, higher torque. |
| W 50 | 50 | 15 | 40° | Very heavy-duty, used in large industrial equipment. |
No products were found matching your selection.