Dongguan Changxinda Precision Technology Co., Ltd.
| Roughness | Ra1.6 |
| Standard | GB,JIS,DIN,ASTM,BS,NF |
| Supply Ability | 10000Pcs/Month |
| Material | Stainless steel |
| Feed Rate | 0.01 to 1000 mm/min |
| Service Technology | Turn-Mill Compound Machining |
| Weight | 1500 kg |
| Payment Terms | L/C,D/A,D/P,T/T |
| Color | Customized,nature |
| Machinetype | CNC Lathe |
| Axis | 2-axis (X and Z) |
| Dimension | accroding to the drawing |
| Applications | Turning, Threading, Drilling, Boring |
| Delivery Time | 3-7 days. Small batch (10-100 pcs): 7-14 days. Mass production: 14-30 days depending on quantity and complexity. Rush service available for urgent projects. |
| Tolerance | +-0.02 |
| Lead Time | 18 days |
| Concentricity | 0.03 |
| Spindlespeedrange | 50-4000 RPM |
| Packaging Details | Standard export packaging or custom |
| Model Number | Custom |
| Certification | ISO9001 |
| Place of Origin | China |
| Brand Name | China-CXD |
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Product Specification
| Roughness | Ra1.6 | Standard | GB,JIS,DIN,ASTM,BS,NF |
| Supply Ability | 10000Pcs/Month | Material | Stainless steel |
| Feed Rate | 0.01 to 1000 mm/min | Service Technology | Turn-Mill Compound Machining |
| Weight | 1500 kg | Payment Terms | L/C,D/A,D/P,T/T |
| Color | Customized,nature | Machinetype | CNC Lathe |
| Axis | 2-axis (X and Z) | Dimension | accroding to the drawing |
| Applications | Turning, Threading, Drilling, Boring | Delivery Time | 3-7 days. Small batch (10-100 pcs): 7-14 days. Mass production: 14-30 days depending on quantity and complexity. Rush service available for urgent projects. |
| Tolerance | +-0.02 | Lead Time | 18 days |
| Concentricity | 0.03 | Spindlespeedrange | 50-4000 RPM |
| Packaging Details | Standard export packaging or custom | Model Number | Custom |
| Certification | ISO9001 | Place of Origin | China |
| Brand Name | China-CXD |
Dongguan Changxinda Precision Technology Co., Ltd. specializes in turn-mill compound machining of precision telephoto lens barrel housings for professional camera and optical instrument applications. Manufactured using advanced turn-mill composite machining centers that combine CNC turning and milling capabilities in a single setup, these large-diameter precision optical housings deliver superior dimensional accuracy, concentricity, and surface finish required for high-performance telephoto lens systems. The telephoto lens barrel serves as the critical structural foundation for long focal length camera lenses, providing precise lens element positioning, smooth focusing mechanisms, and robust mounting interfaces for heavy optical assemblies. The natural aluminum finish with visible machining marks and silvery metallic luster showcases the authentic precision manufacturing quality that professional optical equipment manufacturers trust.
The turn-mill compound machining process offers exceptional advantages for large-diameter telephoto lens barrel production. By performing turning operations for the long cylindrical body and large mounting flange, combined with milling operations for mounting holes and precision features in a single workholding setup, turn-mill machining eliminates the accumulation of setup errors that would occur with conventional multi-machine processing. This single-setup approach ensures perfect concentricity between the large-diameter cylindrical bore, external mounting features, and the oversized mounting flange - absolutely critical for maintaining optical axis alignment in telephoto lenses where even minor misalignment causes significant image degradation. The result is superior geometric accuracy, improved surface finish, and reduced production lead times for these precision large-format optical components.
The aluminum alloy construction offers excellent machinability, good strength-to-weight ratio, and superior thermal stability essential for large telephoto lens applications. The substantial wall thickness and rigid flange design provide the structural integrity needed to support heavy lens element groups while maintaining precise alignment. Aluminum's low thermal expansion coefficient helps maintain optical alignment across temperature variations, critical for outdoor photography applications. The material's excellent machinability enables production of the long precision bore, large mounting flange, and complex internal features with tight tolerances. The natural metallic finish displays characteristic tool marks and bright silvery sheen that indicate high-quality turn-mill compound machining.
Precision is fundamental to telephoto lens barrel performance. Changxinda's turn-mill compound machining operations achieve tolerances of +/-0.01 mm on critical dimensions, ensuring consistent lens element positioning and optical axis alignment across production batches. The single-setup machining process maintains perfect concentricity between the large internal cylindrical bore, external mounting features, and the oversized top flange. Internal diameter accuracy is controlled to tight tolerances to maintain optical axis alignment for the long focal length light path. Flange flatness and perpendicularity are strictly controlled to ensure proper mounting to camera bodies without stress-induced optical distortion. Each barrel is verified using coordinate measuring machines to confirm all critical dimensions meet specifications.
The telephoto lens barrel features a long cylindrical main body with a large-diameter precision bore for accommodating multiple lens element groups. The oversized top mounting flange includes multiple precision holes arranged in a circular pattern for secure attachment to camera bodies or lens mounts. The substantial flange thickness provides the rigidity needed for heavy telephoto lens assemblies. Internal guide surfaces and mounting features are precision-machined for lens element positioning and focusing mechanism integration. The turn-mill process produces all these features - the long precision bore, large mounting flange, mounting holes, and internal features - in a single efficient operation, ensuring perfect geometric relationships between all critical surfaces.
Dongguan Changxinda Precision Technology Co., Ltd. is ISO 9001:2015 certified and committed to delivering precision machined components that meet the highest industry standards. With a team of more than 30 experienced professionals and comprehensive turn-mill compound machining capabilities, the company provides fast delivery, responsive communication, and reliable quality that has resulted in many successful cooperation cases with satisfied customers worldwide. Whether you need prototype telephoto lens barrels for optical system development or production quantities for commercial camera lens manufacturing, Changxinda delivers turn-mill compound machining excellence tailored to your large-format optical housing requirements.
Q1: What advantages does turn-mill machining offer for telephoto lens barrels?
A: Turn-mill machining performs turning and milling in a single setup, ensuring perfect concentricity between the large-diameter bore and mounting flange. This is critical for telephoto lenses where misalignment causes significant image degradation.
Q2: What diameter ranges can you machine for telephoto barrels?
A: Our turn-mill centers can handle large-diameter precision bores from 50mm to 300mm+ diameter, accommodating various telephoto lens formats from DSLR to large-format cinema systems.
Q3: What materials are available?
A: Aluminum alloys (6061-T6, 7075-T6) are standard for their machinability and thermal stability. We also work with magnesium alloys for ultra-lightweight telephoto applications.
Q4: What tolerances can you achieve on large diameters?
A: We achieve +/-0.01mm on critical dimensions. Large bore concentricity is typically held within 0.02mm TIR through single-setup turn-mill machining.
Q5: Can you produce custom designs for specific telephoto systems?
A: Yes, we specialize in custom telephoto barrel manufacturing. Our team works with your optical designs and 3D CAD models to develop barrels meeting your exact specifications.
Q6: What is typical lead time for large telephoto barrels?
A: Prototypes typically require 3-4 weeks due to the large size and precision requirements. Production orders range from 6-10 weeks depending on quantity and specifications.
Q7: Do you provide surface treatments?
A: Yes, we offer anodizing (Type II and Type III hardcoat), black anodizing for internal light control, and custom colors for professional appearance and wear resistance.
Q8: Can you handle both prototype and production quantities?
A: Yes, we support from single-piece prototypes for optical system development to production quantities for commercial telephoto lens manufacturing.
Q9: What quality documentation is provided?
A: We provide material certificates, CMM dimensional reports, surface finish reports, concentricity verification, flatness measurements, and first-article inspection reports.
Q10: How is optical axis alignment ensured in large barrels?
A: Single-setup turn-mill machining maintains concentricity between bore and flange. CMM verification confirms alignment of all critical surfaces to maintain optical performance in telephoto systems.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2008
Total Annual:
10000000-20000000
Employee Number:
90~102
Ecer Certification：
Verified Supplier
Dongguan Changxinda Precision Technology Co., Ltd. is a professional CNC precision parts manufacturer established in Dongguan, China since 2008. With 17+ years of experience and a skilled team of 30+ workers, we specialize in custom CNC precision parts, jigs, fixtures, hardware, molds, and metal pro... Dongguan Changxinda Precision Technology Co., Ltd. is a professional CNC precision parts manufacturer established in Dongguan, China since 2008. With 17+ years of experience and a skilled team of 30+ workers, we specialize in custom CNC precision parts, jigs, fixtures, hardware, molds, and metal pro...
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