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34x5 mm protective lens designed for high-power 20KW fiber laser cutting applications, helping maintain a clean protective barrier between cutting conditions and the cutting head optics.
34x5 20KW Protective Lens for Fiber Laser Cutting Heads
The 34x5 20KW Protective Lens is a fused-silica protective window sized at 34mm diameter x 5mm thickness, rated for fiber laser cutting heads running up to 20kW. It sits on the process or collimation side of the head, forming a replaceable barrier that shields the internal focusing and collimation optics from spatter, smoke and thermal stress during high-power cutting.
The 34x5 window size is one of the more common protective-lens formats used on high-power fiber laser cutting heads, and it is produced in multiple power-rated variants - 6kW, 15kW, 20kW and higher - because the coating and material grade needed to handle thermal stress increases with power. The 20kW-rated version is built for heads and machines running at that higher end, where the window takes more reflected and scattered energy during cutting. Like other protective windows, it is a routine, sacrificial wear part meant to be replaced once pitting, haze or a drop in cut quality shows up, so the more expensive focusing and collimation lenses behind it stay protected.
Key Features of the 34x5 20KW Protective Lens
Fused-silica (quartz) construction sized at 34mm diameter x 5mm thickness
Rated for fiber laser cutting heads up to 20kW
Fits heads specified for this diameter and thickness combination
Acts as a sacrificial barrier for the internal focus/collimation optics
Built to handle the higher thermal load of high-power cutting
Suited to daily-use industrial cutting environments
Applications & Industries
High-Power Fiber Laser Sheet Metal Cutting Machines
Automotive & Auto-Component Manufacturing
Industrial Machinery & Fabrication Units
Metal Processing & Laser Job-Work Shops
Structural Steel & Heavy Fabrication
High-Power CNC Laser Cutting Operations
Benefits of the 34x5 20KW Protective Lens
Features
A 34mm x 5mm fused-silica window rated to 20kW, sized to seat directly into a matching cutting head's process or collimation-side lens holder.
Benefits
Protects the head's expensive focusing and collimation optics under demanding, high-power cutting conditions, helps maintain consistent cut quality, and keeps downtime lower.
How to Confirm You Need This Size
Check your cutting head's specified lens diameter and thickness against 34x5mm.
Confirm your machine's rated power falls within the 20kW class this lens covers.
Compare against the 6kW and 15kW versions of the same 34x5 size if unsure which power class you need.
Inspect the current window for pitting, haze or cracking before ordering.
Confirm fitment with the supplier before placing a bulk order.
Why Choose Us
Correctly sized 34x5mm fused-silica window, not an approximate fit
Ready stock for fast dispatch and reduced machine downtime
GST-registered supplier (GSTIN 24AFSFS3212F1Z2) with proper invoicing
Expert support for size and power-rating selection on WhatsApp
Bulk pricing and pan-India delivery from Ahmedabad, Gujarat
Correctly Sized 34x5 20KW Lens vs a Mismatched Lens
Parameter
Correctly Sized 34x5 20KW Lens
Approximate / Mismatched Lens
Dimension Match
34mm x 5mm, exact
Close but not exact
Power Rating
Matched to 20kW class
Under-rated for the application
Seating in Holder
Sits flush, no gap
Loose fit or forced fit
Thermal Handling
Suited to the rated power
Higher risk of thermal stress damage
Frequently Asked Questions
It is a sacrificial fused-silica window that protects the focusing and collimation optics inside a fiber laser cutting head from spatter, smoke and debris.
34mm diameter x 5mm thickness, rated for cutting heads running up to 20kW.
Fiber laser cutting heads specified for a 34x5mm process or collimation-side window rated to 20kW. Confirm your head's lens holder size before ordering.
Replace it when you notice pitting, burn marks, haze or a drop in cut quality. In daily production it is a routine, frequently-changed consumable.
Yes, bulk quantities are available with a GST invoice for business buyers.
Get the Right 34x5 20KW Protective Lens for Your Cutting Head
Confirm fitment and order the correctly sized 34x5, 20kW-rated protective lens for your fiber laser cutting head, with bulk pricing and pan-India delivery.
