Raytools BS06K-CAT Protective Lens (Bottom) – 27.9 × 4.1mm Fused Silica

Raytools BS06K-CAT Bottom Protective Lens – 27.9 × 4.1mm Maintain reliable cutting performance and protect your fibre laser cutting head with this 27.9 × 4.1mm bottom protective lens, designed for compatibility with the Raytools BS06K-CAT cutting head. Manufactured from high-quality fused silica, this replacement protective lens helps shield the cutting head's internal optical components from molten metal spatter, dust and debris generated during laser cutting. Designed for fibre laser applications operating at a nominal wavelength of 1064nm and rated for power levels up to 4kW, it provides an effective protective barrier while maintaining excellent optical transmission and beam quality. Reliable Protection for Fibre Laser Cutting Heads Protective lenses are essential consumable components in fibre laser cutting systems. Positioned within the cutting head, the bottom protective lens acts as a barrier between the cutting environment and sensitive internal optics. During operation, exposure to heat, contamination and cutting spatter can gradually affect lens condition, potentially reducing cutting quality and increasing the risk of damage to more expensive optical components. Replacing contaminated or damaged protective lenses helps maintain consistent cutting performance and minimise unnecessary machine downtime. High-Quality Fused Silica Construction Manufactured from fused silica, this replacement lens offers excellent thermal stability, low thermal expansion and optical properties suited to demanding fibre laser cutting applications. Its construction helps minimise optical distortion and maintain efficient laser transmission, supporting accurate and consistent cutting results when correctly installed and maintained. Key Features & Benefits Raytools BS06K-CAT compatibility – Designed for use as a bottom protective lens in compatible cutting heads. Precision dimensions – 27.9mm diameter × 4.1mm thickness. High-quality fused silica – Excellent thermal stability and optical transmission. Up to 4kW rated power – Suitable for compatible fibre laser cutting applications within the stated power rating. 1064nm nominal wavelength – Designed for near-infrared fibre laser applications. Protects internal cutting head optics – Helps prevent contamination from dust, debris and molten metal spatter. Supports consistent cutting quality – Helps maintain beam transmission and cutting accuracy. Replaceable consumable component – Straightforward replacement as part of routine cutting head maintenance. Technical Specifications Specification Details Product type Bottom protective lens Compatible cutting head Raytools BS06K-CAT Diameter 27.9mm Thickness 4.1mm Material Fused silica Nominal wavelength 1064nm Stated maximum laser power 4kW Application Fibre laser cutting head protection Compatibility & Maintenance Suitable for Raytools BS06K-CAT fibre laser cutting heads requiring a 27.9 × 4.1mm bottom protective lens. Always check the existing lens dimensions, cutting head model and required optical specification before ordering. For optimum performance, inspect protective lenses regularly and replace them when contaminated, scratched or damaged. Handle replacement optics carefully and follow the cutting head manufacturer's cleaning and installation procedures.