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40x5 mm protective lens designed for fiber laser cutting applications, helping shield cutting head optics from dust, smoke, and spatter during operation.
40x5 Protective Lens for Fiber Laser Cutting Heads
The 40x5 Protective Lens is a fused-silica protective window sized at 40mm diameter x 5mm thickness. 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 40x5mm format is a wider-diameter protective window with a thicker profile than the 40x2mm variant, used on fiber laser cutting head models built around this specific size. As with other protective windows, it takes the direct exposure to spatter and reflected energy at the head, so this low-cost, easily replaced window wears out instead of the more expensive focusing and collimation lenses behind it. It should be checked regularly during maintenance and replaced once wear becomes visible.
Key Features of the 40x5 Protective Lens
Fused-silica (quartz) construction sized at 40mm diameter x 5mm thickness
Fits heads specified for the 40mm diameter x 5mm thickness window format
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 40x5 Protective Lens
Features
A 40mm diameter x 5mm thickness fused-silica window sized for this specific window format, 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 40x5mm.
Compare against other window formats if your head takes a different diameter or thickness.
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 40x5mm 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 40x5 Lens vs a Mismatched Lens
Parameter
Correctly Sized 40x5 Lens
Approximate / Mismatched Lens
Dimension Match
40x5mm, exact
Close but not exact
Fit Precision
Matched to the exact window recess
Loose fit or forced fit
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.
40mm diameter x 5mm thickness.
Fiber laser cutting heads specified for a 40x5mm 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.
