Carbide Indexable Inserts
Dedicated to Premium
Carbide CNC Inserts
Founded on 27 July 2018, Zhuzhou Delong Metal Material Processing Co., Ltd. is based in Building 36, Zhongnan Hi-Tech Intelligent Manufacturing Industrial Park, in the Zhuzhou National High-Tech Industrial Development Zone, Hunan. We bring R&D, production, sales and custom manufacturing under one roof. Of our 60-plus employees, more than 20 are senior technicians with over 15 years in the cutting-tool industry.
Nearly 6% of sales revenue is reinvested in R&D. Our range covers turning, milling, precision, grooving and parting, and deep-hole drilling inserts, plus custom non-standard carbide products. They are used in aerospace, automotive and die & mold machining, and sold throughout China and abroad.
Six Product Families
Tooling Inserts · 2026 Catalog
Turning, milling, grooving and parting, precision machining, drilling and special-purpose inserts. Every family is organized by ISO geometry, with technical drawings and catalog pages for each model.
01Turning Inserts
Negative and positive rake inserts, from roughing through finishing
97 Models
02Milling Inserts
Standard and side-and-face milling inserts for precision milling
57 Models
03Grooving & Threading
Dedicated inserts for grooving, parting-off and threading
18 Models
04Precision & Cermet
Cermet inserts and high-precision finishing inserts
80 Models
05DTH & Deep-Hole Drilling
Down-the-hole and deep-hole drilling series for high-efficiency drilling
7 Models
06Special-Purpose Inserts
Bar peeling, wheel hub and profile turning inserts
4 ModelsNational High-Tech
Certified Enterprise
Precision manufacturing at the core, certified management systems around it. 20 million inserts a year · 60+ employees · exports to 20+ countries · 14 granted patents — the technical foundation Delong is built on.
50 precision machines · RMB 50M invested
20+ senior technicians · 15+ years in the trade
Europe & N. America / SE Asia / Middle East / S. America
13 utility models + 1 invention patent
Latest News
News · Events · Media
Process upgrades, certification updates, customer cases and industry news — the latest from Delong and the shop floor.
01Company News→Delong Passes ISO Three-System Audits Again
02Company News→From High-Tech Recognition to the Specialized-SME Review
03Company News→Delong Passes the National High-Tech Enterprise Review
Tell Us the Job.
Custom Solutions
Hard-to-machine aerospace alloys, high-volume automotive lines or precision die & mold work — our engineers support you end to end, from insert selection and sample testing to volume supply.