Hardened steel
Send material, hardness, allowance and finish target. Distinguish continuous finishing from interrupted cutting.
HUAMIN TOOLS / CUBIC BORON NITRIDE
CBN Inserts for Hardened Steel & Cast Iron Machining
Start with your material, hardness and cutting conditions. Compare CBN grades, construction variants and 17 insert families to build a precise enquiry.
Get a Grade Recommendation Browse Insert ModelsSolid CBN · Brazed PCBN · PCBN · Coated PCBN
Match the grade to your workpiece.
Cast iron
Identify gray, chilled or high-alloy cast iron. Include scale, interruption and current wear pattern.
HSS & powder metallurgy
Confirm composition, hardness, porosity and cutting stability before choosing construction and edge preparation.
Compare Huamin CBN grades.
Application references from the current catalog. Confirm construction, grade and edge preparation for the chosen model.
MZT10
Chilled cast iron, high-Ni-Cr cast iron and high-hardness alloy cast iron
Roughing
Alloy cast iron, slurry pumps and wear-resistant castings
MZT20
High-speed steel
Roughing
HSS rolls
MZT30
Hardened steel, heat- and abrasion-resistant steel, and high-manganese steel
Roughing / semi-finishing
HSS rolls, ball screws and wind-power bearings
MZT40
Hardened steel
Finishing
Wind-power bearings
MZT50
Gray cast iron
Roughing / finishing
Brake discs, cast-iron engines, gearboxes and cylinder liners
MTH100
Hardened steel
Semi-finishing / finishing
Bearings, gears, gear shafts and hardened molds
MTH200
Hardened steel and other difficult-to-machine materials
Semi-finishing / finishing
Hardened-steel gears and molds
MTH300
Gray cast iron
Semi-finishing / finishing
Brake discs, cast-iron engines and gearboxes
MTH400
Gray cast iron and iron-based alloys
Semi-finishing / finishing
Brake discs, brake drums, cast-iron engines and gearboxes
MFH101
Hardened steel
Finishing
Gears, gear shafts and bearings
MFH201
Hardened steel and high-strength cast iron
Finishing
Bearings, gears, gear shafts and high-hardness components
MFH301
Hardened steel
Finishing
Bearings, gears, gear shafts and molds
MFH401
Powder-metallurgy materials
Finishing
Powder-metallurgy valve seats
MFH502
Gray cast iron and powder-metallurgy materials
Finishing
Valve-seat rings, engine cylinder bores and powder-metallurgy parts
MFH101 C02
Hardened steel
Finishing
Bearings, gears, gear shafts and molds
MFH201 C02
Hardened steel
Finishing
Bearings, gears, gear shafts and high-hardness components
MFH301 C02
Hardened steel
Finishing
Bearings, gears, gear shafts and molds
Give us the cutting conditions that matter.
Workpiece
Material, hardness, scale and interruption severity.
Operation
Speed, feed, depth of cut, coolant and workholding.
Target
Required surface finish, dimensional tolerance and current tool wear.
Questions about CBN inserts
What are CBN inserts?
CBN inserts use cubic boron nitride cutting material for selected hard and abrasive ferrous workpieces. Construction, binder, grade and edge preparation affect suitability.
How are CBN inserts used?
Typical applications include hard turning, cast iron machining and selected high-speed steel or powder-metallurgy operations. Review the actual material, hardness and cutting conditions first.
What materials are CBN inserts used for?
The range covers hardened steel, gray and alloy cast irons, selected high-speed steels and ferrous powder-metallurgy materials. Application suitability depends on the grade.
Are CBN inserts suitable for aluminum?
For aluminum, copper and most non-ferrous workpieces, start with our PCD insert range. Mixed-material components require separate evaluation.
How do I choose the right CBN grade?
Send material designation, hardness, finishing allowance, interruption level, speed, feed, depth of cut, coolant and required surface finish. Select Please recommend if unsure.
What is the difference between solid CBN and PCBN variants?
Construction and usable cutting edges differ. The same ISO family may have several constructions and edge counts; select the variant as well as the full insert code.
Can CBN inserts handle interrupted cutting?
Suitability depends on interruption severity, workholding, grade and edge preparation. Do not assume that a finishing grade also suits interrupted roughing.
Can Huamin Tools provide custom CBN inserts?
Send a dimensioned drawing, construction and edge requirements, material and quantity for a feasibility review.
Are all listed combinations in stock?
Specifications and grade options are catalog references. Confirm the exact model, construction, edge count, grade and drawing for availability and lead time.