Boci Original Laser Protective Lens Windows D34X5 Blt421 Head

• Customization: Available
• After-sales Service: Online Guildance;Factory Training
• Customized: Customized
• Model NO.: boci
• Standard Component: Standard Component
• Type: Laser Source
• Product Name: Boci Focusing Collimating Lens
• Product Type: Laser Cutting Head Parts
• Protective Lens: Quartz Fused Silica Laser Protective Lens
• Apply to: Handheld Laser Welding Machines
• Diameter mm: 22.4/24.9/27.9/37/30/34/38.1/38/50
• Thickness mm: 1.5/1.6/2/4.1/5/7
• Marketing Type: Original Lens
• Laser Type: Fiber Laser Lens
• Applicable Industries: Laser Welding/Cutting/Engraving Machine
• Suitable Power: 0-8kw
• Wavelength Nm: 1064 Nm
• Accessories: Laser Torch Accessories
• Ceramic Part: D41 M11
• Nozzle: M11 H15
• Bochu: Boci Laser Cutting Head
• Transport Package: Carton Box
• Specification: BOCI
• Trademark: BOCI
• Origin: China
• HS Code: 8456909000
• Package Size: 12.00cm * 11.00cm * 10.00cm
• Package Gross Weight: 0.900kg

Product Description

LARGE STOCK OF LASER REPLACEMENT  CONSUMABLES AND CHINA LASER SOURCE
Allwin cnc machinery holds the largest stocks of genuine laser consumables and spare parts.
Available in-stock we offer competitive pricing and superb service.

The D34x5 protective lens (34mm diameter, 5mm thickness) is a key consumable commonly used in the BOCI BLT421 series fiber laser cutting heads. It is typically used as a "lower protective lens," mounted above the nozzle to block metal splatter and dust generated during cutting, thus protecting the expensive focusing lens.

Packaging & Shipping

 

Core Parameters and Specifications:
Dimensions: Diameter 34mm, Thickness 5mm.
Power Compatibility: Designed for high-power lasers, supporting fiber laser systems of 8kW, 15kW, 20kW, and even up to 40kW.
Material Properties: Made of high-purity Quartz Fused Silica, featuring extremely high light transmittance (typically >99.76%) and excellent thermal shock resistance.
Coating Process: Double-sided 1064nm anti-reflective (AR) coating to reduce laser loss and prevent lens overheating and deformation.

Specification Chart

 

CHECK WHICH PLASMA CONSUMABLES YOU NEED
 

List of Laser Lens Models for Raytools Cutting Head
Product Model	Specification (mm)	Description
211LCG0034	D22.4*4.1	Focusing Protective Lens
211LCG0020	D24.9*1.5	Collimating Protective Lens
211LCG0037	D27.9*4.1	Focusing Protective Lens
211LCG0037E	D27.9*4.1 New	Focusing Protective Lens
211LCG0045	D37*1.6	Collimating Protective Lens
211LCG0068	D30*5	Focusing Protective Lens
110255IAG0004	D37*7 6k	Focusing Protective Lens
211LCG0078	D37*7 12k	Focusing Protective Lens
211LCG0076	D38.1*1.6	Collimating Protective Lens
211LCG0075	D38*2	Focusing Protective Lens
211LCG0069	D50*2	Focusing Protective Lens
211LCG0070	D50*2 Full-wave band	Focusing Protective Lens

 

	POWER	FOCAL DISTANCE	SIZE	AUTO RANGE
BLT421	≤8kw	150/200	404*122	±50
BLT441	≤15kw	200
BLT461	≤20kw	200
BLT481	≤30kw	200

 

BLT4XX series=2d /bevel laser cutting series
Focus range:±50mm
Reposition Precision: +0.01mm
Focus Speed: 500mm/s
Max Gas Pressure: 25Bar
Laser Wavelength: 1030-1090nm

Cutter Model	BLT421/BLT421S series	BLT441 series	BLT462 series	BLT482 series	BLT4102 series
Support Power Range	≤8kw	≤15kW	≤20kw	≤30kW	≤40kW
Fiber Interface	QBH,EOC	Q+, QD, QBH, ADD
Focal Length (mm)	150/200	200	200	200/300	300

Compatible Models
This lens specification (D34x5) is primarily compatible with the following BOCI intelligent laser head series:
BLT421 / BLT421S: Mainstream 8kW-15kW autofocus cutting heads.
BLT441 / BLT461: Mid-to-high power series.
BLT641 / BLT642H: Suitable for ultra-high power (15kW and above) cutting machines.

The lifespan of Fiber Laser Lens
The lifespan of laser cutting and laser welding machine lenses can vary depending on several factors. These factors include the laser power, operating conditions, maintenance practices, and the quality of the lenses themselves.
Typically, high-quality lenses used in laser cutting and welding machines have a relatively long lifespan. With proper care and maintenance, they can last for hundreds or even thousands of hours of operation. However, it's important to note that the lenses will gradually degrade over time due to factors such as thermal stress, beam intensity, and debris accumulation.
Regular cleaning and inspection of the lenses are essential to prolong their lifespan. Keeping the lenses free from dirt, debris, and residue will help maintain their optical clarity and efficiency. Additionally, following the manufacturer's recommended maintenance procedures and replacing the lenses when necessary will ensure optimal performance and extend their lifespan.
 

Product Description

Imported Blue Film Laser Protective Lens JGS1 Optical Quartz Glass Laser Protection Optical Lens

Laser Cutting Head
The primary function of a laser cutting head is to focus the laser beam to a small spot size and accurately direct it onto the workpiece. It contains optical components, such as lenses or mirrors, that manipulate the laser beam to achieve precise cutting.

 

Laser Protective Mirror
Thoroughly clean both the laser focus lens and the lens mounting area on the laser machine before installation.

Laser Collimating Lens
Wear appropriate personal protective equipment, such as safety goggles, to protect your eyes from laser radiation. 
Laser Focusing Lens
Ensure that the laser focus lens is compatible with your specific laser machine.

Laser Ceramic Part
The ceramic ring is a key component of fiber laser cutting heads (such as Precitec and Raytools), mounted above the nozzle. Its main function is to transmit the electrical signals collected by the nozzle to maintain a stable distance between the nozzle and the workpiece, and also serves as a "pre-break point" for impact protection.

Laser Cutting Nozze
The nozzle removes molten metal and protects the lens by controlling the flow and direction of the auxiliary gas. Choosing the right nozzle depends primarily on the thickness and type of the material being cut, as well as the laser head model.

 

Common Nozzle Types and Selection

Depending on the cutting process, nozzles are generally divided into single-layer and double-layer types:
Single Layer Nozzle
Applications: Primarily used for cutting stainless steel, aluminum alloys, brass, etc., using nitrogen (N2) or compressed air.
Advantages: Slower gas flow rate effectively prevents oxidation of stainless steel surfaces, resulting in a smoother cut.

Double Layer Nozzle
Applications: Specifically designed for cutting low-carbon steel using oxygen (O2).
Advantages: Features an internal airflow channel, providing a fast and concentrated gas flow rate, which helps assist the oxidation reaction and quickly removes heavy slag.

Nozzle Orifice (Diameter) Selection Guide
Based on material thickness, recommended common orifice diameters are as follows:
Thin Plates (below 3mm): A 1.0mm - 1.5mm orifice diameter is recommended to ensure a fine cut.
Medium-Thick Plates (3mm - 10mm): A 2.0mm - 3.0mm orifice diameter is recommended to increase airflow and improve slag removal efficiency.
For thick plates (10mm and above): It is recommended to use a large diameter of 3.0mm - 6.0mm or larger to ensure that the gas can penetrate deep cuts.

How to extend the lifespan of laser consumables?

The key to extending the lifespan of laser cutting machine consumables (protective lenses, nozzles, ceramic rings) lies in regular cleaning, standardized operation, and environmental control.

1. Promptly remove dirt and dust from the machine body, cutting head, sensors, and other components to prevent lens contamination.
2. Depending on the frequency of laser cutting machine use, regularly and carefully wipe reflectors, focusing lenses, etc., with anhydrous alcohol.
3. In high-temperature or humid environments, pay attention to whether water vapor condenses and clean it promptly.
 

Company Profile

FAQ

Question : How about your after service?

Answer : Technical support by phone, e-mail or MSN around the clock.
Question : How can we install the consumables?
Answer : Friendly English version manual and operation video CD disk.
Question : How do I choose the right consumables for my machine?
Answer : According to your needs and budget, we will provide the best answer for your efficient production.
Question : How about the payment terms?
Answer : 30% T/T for deposit, 70%T/T paid before shipping. 
Question : When can I get the price?
Answer : We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price, please tell us in your email so that we will regard you inquiry priority.
Question : Can I get a lower price if I order large quantities?
Answer : Yes, once the order is confirmed, you will enjoy our factory price.
Question: Which port is the nearest from your company?
Answer : The Qingdao port is the nearest
Question: Can I have a visit to your factory before the order?
Answer : Yes, look forward to communicating and cooperating with you!
Answer : Yes, look forward to communicating and cooperating with you!