ZNK Laser Protective Lens 37×7 20kW
This ZNK protective lens is an optical consumable for fiber laser cutting heads. It sits in front of the focus lens and takes the hit from spatter, dust and fumes, protecting the more expensive focusing optic behind it. Made from high-purity fused silica, the Ø37 mm × 7 mm size is fixed by the model designation and the part is specified for use at up to 20 kW.
Specifications
| Model | 37×7 Protective Lens |
| Diameter (D) | 37 mm |
| Thickness (T) | 7 mm |
| Power Rating | 20 kW |
| Material | High-purity fused silica / quartz |
| Application | Protects the focus lens in fiber laser cutting heads |
Key Features
| Feature | Benefit |
|---|---|
| Lens protection | Shields the focus lens from molten spatter and debris, extending optic life. |
| Rated for 20 kW | Specified for high-power fiber laser cutting systems. |
| High-purity fused silica | Low-absorption optical material helps maintain beam quality under high power. |
| Low-cost consumable | Inexpensive part to replace during routine maintenance. |
Compatibility
Sized for fiber laser cutting heads that use a Ø37 mm × 7 mm protective window rated to 20 kW. If you are unsure whether this size matches your cutting head, send us your head model and we will confirm before you order.
Applications
| Use Case | Details |
|---|---|
| Optic protection | Guards the focus lens from spatter on high-power heads |
| Production cutting | High-throughput fiber laser cutting |
| Maintenance | Replacement protective lens for worn or contaminated parts |
Why Choose ZNK?
| Specialist supplier | Focused on fiber laser cutting consumables and spare parts |
| Reliable fit | Dimensionally consistent parts for repeatable results |
| Technical support | We help you match the right consumable to your machine |
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