From Manufacturing to Product Co-Development in High-Precision Medical Projects

In modern medical and industrial manufacturing, producing a part that simply meets drawing dimensions has never been the only factor determining a project’s success. 

The real challenge lies in simultaneously controlling: 

• Tight tolerances 
• Cosmetic quality 
• Assembly stability 
• Mass production capability 
• And continuous engineering changes throughout the product development process

Currently, CNCTech is collaborating with Dentis Co., Ltd — a Korean company specializing in the development and assembly of dental equipment — in the development of multiple component assemblies for dental chair systems. 

(Product reference images from dentis.co.kr)

The project scope includes: 

• Precision CNC machining 
• Mold manufacturing 
• Technical plastic injection molding 
• Aluminum extrusion and machining 
• Gravity casting (CNCTech supports product development together with suppliers) 
• Die casting (CNCTech designs tooling, casting is handled by suppliers, and final machining is completed in-house) 

The project currently involves approximately 35 components undergoing prototyping and engineering optimization before mass production. 

CNCTech is manufacturing and supporting the development of various components ranging from shafts, support arms, frame structures, and dental chair bases to electronic equipment housings, all requiring high assembly precision, dimensional stability, and cosmetic consistency. 

In addition, CNCTech is collaborating with Vineco — a member of the CNCTech ecosystem equipped with advanced SMT lines and electronic PCB assembly capability — to develop lighting modules for the dental chair system. 

 (visit Vineco with customer)

One of the biggest challenges of the project is controlling both machining accuracy and cosmetic quality simultaneously, especially for painted aluminum parts used in high-appearance assemblies. 

In many cases, parts may meet machining tolerances but still encounter issues such as: 

• Uneven assembly gaps 
• Cosmetic inconsistencies after painting 
• Insufficient assembly stability in real applications 
• Or designs that are not yet optimized for mass production 

In addition, since the products are still under development, engineering changes occur continuously throughout the project, including: 

• CAD design updates 
• Tolerance adjustments 
• Modifications based on assembly validation results 
• Design optimization for better manufacturability 

Many assemblies also require ISO 2768-1 (F) tolerance standards, including painted aluminum cast parts where machining precision, cosmetic quality, and assembly performance must all be controlled simultaneously. 

To better support Dentis during the product development process, CNCTech has: 

• Responded quickly to engineering changes 
• Proactively performed real assembly validation using jigs and mating parts 
• Designed and fabricated custom jigs for assembly verification 
• Proposed tolerance optimization based on actual assembly results 
• Coordinated with casting, extrusion, and raw material suppliers to optimize manufacturability and production cost 
• Continuously provided engineering feedback to improve design efficiency and shorten development lead time 

Due to the complexity of the project, the Dentis engineering team has traveled to Vietnam multiple times to work directly with CNCTech and related suppliers to resolve issues related to tooling, assembly, and process optimization. 

Thanks to the close collaboration among all parties, multiple product models have successfully completed the development stage and entered mass production. At the same time, several new product categories and development projects are still being actively researched, tested, and further developed together with CNCTech. 

Projects like this demonstrate that: 

A good supplier is not only capable of manufacturing parts according to drawings. 

But also capable of supporting customers throughout the entire product development process — from prototyping and assembly validation to mass production readiness. 

At CNCTech, manufacturing is not only about machining capability — it is also about engineering collaboration and long-term partnership with customers. 

Contact us for more information:

Email: hello@cnctech.vn

Hotline: (+84) 868 208 111