Optical Focusing Lens Barrel Assembly | CNC Machining Manufacturer

Product Description

Our Optical Focusing Lens Barrel Assembly is a complete set of precision optical structural components, including main lens barrel, sliding sleeve and retaining ring, manufactured from 6061 aluminum alloy. It serves as the core mechanical kit for zoom & focus adjustable lenses, processed by combined turn-mill composite and 5-axis CNC machining, finished with black hard anodizing.

The manufacturing workflow starts with aluminum bar cutting. CNC lathe rough turning forms inner & outer circles, steps, inner shoulders and external threads. Then 5-axis or turn-mill equipment machines spiral inclined slots, straight sliding grooves, positioning pin holes, counterbore mounting holes and bayonet slots. Next, inner wall deburring and high-gloss boring are carried out. After full dimensional inspection, parts go through black hard anodizing, followed by secondary cleaning and re-inspection to eliminate dust residue, meeting strict optical cleanliness requirements.

The most critical feature is the spiral inclined guide slot on the barrel body, which acts as the guide track for focusing movement. The slot width, depth and helix angle are tightly controlled with strict tolerances. Smooth slot walls without tool joint marks guarantee a stable focusing experience with no jitter or wobble. 5-axis simultaneous milling is required to create the continuous smooth spiral profile, which cannot be achieved by standard 3-axis machines.

Multi-layer coaxial positioning shoulders inside the barrel secure lens spacers and retaining rings. Strict coaxiality and end runout control prevent lens eccentricity and blurred imaging. Inner and outer circles are completed in a single clamping setup to minimize positioning errors from repeated re-fixturing. Straight sliding grooves limit travel and prevent rotation of the inner sleeve, while end bayonet slots define the end stop of focusing movement. Sharp corners are fully cleaned to avoid scratching internal sliding assemblies.

The inner bore adopts optical-grade surface finishing to reduce roughness and suppress stray light reflection for better image quality. We closely monitor the anodizing film thickness at 20–30μm, because uneven coating will change inner diameter and cause tolerance out-of-specification. All components are produced as a matched set with carefully controlled fitting clearances, ensuring interchangeability and smooth assembly in mass production.

We deliver one-stop service from 3D drawing breakdown, process planning to mass finished product delivery. Our machining tolerance reaches ±0.01mm. We are capable of complex cavity 3-axis & 5-axis CNC machining for non-standard custom metal parts. We support small batch sampling and large-volume mass production with stable product consistency.

Key Features

• Material: 6061 Aluminum Alloy, black hard anodized finish
• Machining: Turn-mill composite + 5-axis CNC integrated machining
• Precision: ±0.01mm tight tolerance control
• Core Structure: Continuous spiral guide slot, multi-stage coaxial positioning shoulders
• Surface: Optical grade inner bore, low reflection, anti-glare black coating
• Service: Prototype, small batch & mass production available

Benefits

• Integrated spiral groove & rotary barrel forming, no welding seams for high structural rigidity
• High coaxiality lens mounting shoulders to maintain lens concentricity and stable imaging
• Black hard anodized surface provides wear resistance, corrosion resistance and stray light suppression
• Matched component sets guarantee interchangeability and smooth assembly
• Customizable barrel dimensions for different focal length optical lens projects

Applications

✅ Machine Vision Optics: Industrial inspection cameras, production line scanning zoom lenses ✅ Precision Measuring Optics: Telephoto zoom lenses, microscope optical assemblies ✅ Surveillance & Vision: High-definition security cameras, vehicle inspection optical modules ✅ Laser & Scientific Equipment: Laser collimating lenses, laboratory research optical devices ✅ Medical Optics: Medical endoscope optical sleeves and related optical structural parts

Why Choose Us

We are a professional high-end CNC machining factory with ±0.01mm machining accuracy. Every toolpath reflects our pursuit of precision manufacturing. We offer full service from 3D drawing analysis, process planning, CNC programming, prototype testing to mass delivery. We specialize in complex cavity 3-axis & 5-axis CNC machining for non-standard aluminum, stainless steel and copper components.

We serve global B2B customers across multiple industries:

1. Consumer Electronics: Phone, tablet & laptop housings, heat sinks, camera brackets, VR/AR structural parts, wearable shells
2. Automation & Industrial Equipment: Jigs, fixtures, module frames, sliding blocks, motor bases, sensor housings
3. Semiconductor & Vacuum Equipment: Vacuum cavities, connectors, precision bases, inspection tooling
4. Medical Devices: Surgical instrument bases, medical detector housings, endoscope & medical aesthetic structural parts
5. Automotive: New energy motor housings, battery end plates, sensor brackets, automotive lighting components
6. Aerospace & UAV: Aircraft structural parts, drone frames, aviation instrument housings
7. Optics & Photonics: Optical barrels, lens bases, light source heat sinks, camera module supports
8. Telecommunications: 5G base station heat cavities, filter components, communication equipment housings
9. Robotics: Robot joint parts, reducer housings, AGV structural components
10. Instrumentation: Test equipment housings, precision gauge bases, flowmeter & lab equipment parts

We support custom samples, small batch and mass production. Send your 3D drawings to get your quotation quickly.

FAQ

Q1: What material options for optical lens barrel? A: Mainly 6061 aluminum, we also support custom 7075 aluminum, stainless steel as requested.

Q2: What is your machining tolerance? A: Our precision CNC machining can reach ±0.01mm for high-demanding optical components.

Q3: Can you fabricate according to my 3D CAD drawings? A: Yes. Please send STEP/IGS files, our engineers will conduct drawing evaluation and process planning.

Q4: What surface treatments for optical barrel? A: Black hard anodizing, natural anodizing, polishing, high-gloss boring, optical anti-reflection surface treatment.

Q5: What is your order volume range? A: We accept prototype, small batch and large mass production orders.

Our CNC Machining Services

We are a trusted CNC machining manufacturer & factory, delivering high precision custom metal components for global B2B buyers.

• 3-axis & 5-axis CNC Milling
• CNC Turning & Turn-Mill Composite Machining
• Non-standard custom metal parts & complex cavity machining
• 3D drawing evaluation, process planning, prototyping & mass production
• Available Materials: 6061/7075 Aluminum, 303/304 Stainless Steel, Copper
• Surface Finishing: Anodizing, Passivation, Polishing, High-gloss mirror cutting, Deburring

Industries We Serve Consumer Electronics | Automation & Industrial Equipment | Semiconductor & Vacuum | Medical Devices | New Energy Automotive | Aerospace & UAV | Optics & Photonics | Telecommunications | Robotics | Instrumentation

Get A Free Quote Share your 3D drawings and specifications, our engineering team will review and reply promptly.