BM111 LENS

About BM111 LENS

The BM111 is an auto-focus fiber laser cutting head designed for CNC fiber laser machines used to cut metal sheets and tubes. It automatically adjusts the focusing lens position to maintain the correct focal point for different material thicknesses, improving cutting speed, precision, and efficiency.

Basic Description

The BM111 cutting head receives the laser beam from the fiber laser source and focuses it into a small, high-energy spot on the workpiece. This concentrated beam melts or vaporizes the metal while assist gas (oxygen, nitrogen, or air) removes molten material during cutting.

It includes optical components such as:

• Collimating lens

• Focusing lens

• Protective lenses (cover glasses)

• Nozzle and gas flow system

These parts help maintain stable beam quality and protect the optics during cutting operations.

Key Features

• Auto-focus system adjusts focus automatically with accuracy about 0.05 mm.

• Power capacity up to about 3.3 kW for medium-power fiber laser machines.

• Dual water-cooling circuits to maintain stable temperature.

• Three protective lenses (top, middle, bottom) to protect optical lenses.

• IP65 dust-proof design for longer service life.

• Modular structure for easier maintenance and lens replacement.

Main Technical Specifications

• Model: BM111

• Laser Power: 3.3 kW

• Clear Aperture: 28 mm

• Collimation Lens: F75 or F100

• Focusing Lens: F125 / F155 / F200

• Auto-focus Range: +10 mm to 12 mm

• Assist Gas Pressure: up to 30 bar

• Weight: about 5.7 kg

• Fiber Interface: QBH / QD