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25.4x4 mm protective lens designed for 4KW fiber laser cutting applications, helping shield cutting head optics from dust, smoke, and spatter during operation.
25.4x4 4KW Protective Lens for Fiber Laser Cutting Heads
The 25.4x4 4KW Protective Lens is a fused-silica protective window sized at 25.4mm diameter x 4mm thickness. It is rated for fiber laser cutting heads running up to 4kW. It fits 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 cutting.
The 25.4x4mm format is a standard mid-size protective window used on fiber laser cutting heads specified for general-purpose cutting at entry-level power. The 4kW rating matches the common power range seen on many machines used for everyday sheet metal work. As with any protective window, it should be checked regularly during maintenance and replaced once pitting, haze or a drop in cut quality becomes visible, protecting the focusing and collimation optics behind it.
Key Features of the 25.4x4 4KW Protective Lens
Fused-silica (quartz) construction sized at 25.4mm diameter x 4mm thickness
Rated for fiber laser cutting heads up to 4kW
Fits heads specified for this diameter and thickness combination
Acts as a sacrificial barrier for the internal focus/collimation optics
Low-cost routine consumable, easy to inspect and replace
Suited to daily-use industrial cutting environments
Applications & Industries
Fiber Laser Sheet Metal Cutting Machines
Automotive & Auto-Component Manufacturing
Industrial Machinery & Fabrication Units
Metal Processing & Laser Job-Work Shops
Structural Steel & Heavy Fabrication
General & High-Power CNC Laser Cutting Operations
Benefits of the 25.4x4 4KW Protective Lens
Features
A 25.4mm diameter x 4mm thickness fused-silica window rated to 4kW, 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, helps maintain consistent cut quality, and keeps downtime and maintenance cost lower.
How to Confirm You Need This Size
Check your cutting head's specified lens diameter and thickness against 25.4x4mm.
Confirm your machine's rated power falls within the 4kW class this lens covers.
Compare against other sizes in this range if your head takes a different diameter or thickness.
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 25.4x4mm 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 fitment selection on WhatsApp
Bulk pricing and pan-India delivery from Ahmedabad, Gujarat
Correctly Sized 25.4x4 4KW Lens vs a Mismatched Lens
Parameter
Correctly Sized 25.4x4 4KW Lens
Approximate / Mismatched Lens
Dimension Match
25.4x4mm, exact
Close but not exact
Power Rating
Matched to 4kW class
Under-rated for the application
Seating in Holder
Sits flush, no gap
Loose fit or forced fit
Sealing
Consistent dust/spatter seal
Gaps can let debris through
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.
25.4mm diameter x 4mm thickness, rated for cutting heads running up to 4kW.
Fiber laser cutting heads specified for a 25.4x4mm process or collimation-side window. 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 25.4x4 4KW Protective Lens for Your Cutting Head
Confirm fitment and order the correctly sized 25.4x4 4KW Lens protective lens for your fiber laser cutting head, with bulk pricing and pan-India delivery.
