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CBN Milling Inserts
Milling ferrous materials at high speeds creates extreme heat and impact forces that destroy standard carbide tools.
Sundi CBN Milling Inserts are formulated with a specialized Cubic Boron Nitride binder matrix designed specifically for the brutal “hammering” effect of milling. Whether you are facing Gray Cast Iron engine blocks or roughing Hardened Steel molds, Sundi CBN allows you to run at significantly higher speeds than carbide, drastically reducing cycle times while maintaining superior edge reliability.
Milling Solutions for Tough Materials
Sundi offers a versatile range of CBN milling inserts compatible with standard face mills and shell mills.
Double-Sided Multi-Corner: Economic negative inserts offering multiple cutting edges per insert for maximum cost-efficiency in roughing operations.
Wiper Finishing Inserts: Specialized positive inserts designed strictly for finishing passes to achieve mirror-like surfaces.
Solid CBN Inserts: For the most demanding heavy roughing applications where tipped inserts might face delamination risks.
Precision End-Milling Tools: Solutions for die & mold cavity milling in hardened tool steels.
Ideal Industries & Applications
Sundi CBN Milling Inserts are the tool of choice for high-volume automotive and heavy equipment manufacturers.
Automotive Engine Blocks: High-speed face milling of Gray Cast Iron (GCI) decks and faces.
Cylinder Heads: Finishing fire decks to strict flatness and sealing tolerances.
Heavy Machinery: Milling large gearbox housings and slurry pump casings.
Die & Mold: Roughing and finishing hardened tool steels without annealing.
- High wear resistance
- Reduce the machine time
- Stable Performance
- Easy to use
Why Choose Sundi CBN for Milling?
Milling is an inherently “interrupted” process. Unlike turning, the insert enters and exits the cut thousands of times per minute. Standard CBN grades often fail due to chipping or thermal shock. Sundi solves this.
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1. Extreme Impact Toughness
We utilize a tailored CBN grade structure with a reinforced binder for milling applications. This robust composition absorbs the shock of entering the workpiece, preventing the premature edge chipping that plagues standard hard milling tools.
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2. Resistance to Thermal Cracks
Rapid heating and cooling during milling can cause "comb cracks." Sundi CBN Milling Inserts feature excellent thermal stability. We generally advocate for Dry Machining to minimize thermal shock, extending tool life significantly.
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3. Superior Surface Finish (Wiper Technology)
Achieve grinding-quality finishes on milling machines. Our inserts with Wiper Geometry are designed to smooth out feed lines on large flat surfaces, delivering a consistent, high-quality finish even at higher feed rates.
Accelerate Your Milling Operations
Stop limiting your milling speeds with carbide. Switch to Sundi CBN Milling Inserts for high-speed, dry machining of cast iron and hardened steel.
FAQ
Most frequent questions and answers
A: Generally, NO. For milling Cast Iron and Hardened Steel, we recommend running Dry (or with compressed air). Coolant creates “Thermal Shock” as the hot insert exits the cut and is blasted by cold fluid, which causes micro-cracking. Dry machining usually yields the most stable tool life.
A: Toughness. Turning is often continuous, so turning grades prioritize wear resistance. Milling is highly interrupted (impact), so Sundi CBN Milling grades are engineered with higher binder toughness to resist breaking under impact.
A: No. For Aluminum milling, please use our Sundi PCD Milling Inserts. CBN is chemically compatible only with Ferrous (Iron-based) materials. Using CBN on Aluminum will result in built-up edge and poor performance.