13.05.2025

URMA MX boronite – Milling with precision and efficiency

High-precision quick-change system for milling cast iron and hardened steel

Article: URMA AG

URMA AG is expanding its range of precision tools with the MX boronite CBN face milling cutter, which has been specially developed for machining cast materials and hardened steel. Here too, URMA AG relies on its proven quick-change system, which is known for optimum handling and maximum precision.

PDF: Media release

URMA AG, a Swiss company with over 60 years of expertise in the field of precision tools, has established itself as a leading expert in precision machining. Under the guiding principle "Innovation is Our Tool", the family-owned company based in Rupperswil (Switzerland) develops and produces state-of-the-art precision tool systems. These are used worldwide in industries such as machine building, the automotive industry, the hydraulic sector, and aviation.

Following the launch of the innovative “MX diamond” PCD face milling cutter, there was great demand for a face milling cutter for other materials. URMA AG fulfilled the customers’ wishes and used its many years of expertise in product development. The result is MX boronite, a modular cutting tool that offers the proven and exact RX interchangeable interface to ensure perfect axial run-out without readjustment when changing cutting edges. URMA thus relies on the same technology as the MX diamond.

The cutting edges of the solid carbide cutting body are equipped with up to 10 CBN tips (cubic boron nitride) and are ideal for machining hard and abrasive metals. CBN is the second hardest material after diamond. Tools made of CBN are much more wear-resistant than other cutting materials. This not only enables greater shape and dimensional accuracy, but also the reliable machining of hard materials (steel of over 60 HRC).

MX boronite belongs to the latest generation of face milling tools and guarantees lean production processes and automated production. With a feed rate of 0.05 to 0.3 mm per tooth and a cutting speed of up to 3,000 m/min, the MX boronite is ideal for mass production. Various geometries are available to meet individual requirements.

Advantages of MX boronite at a glance

Quick-change system for easy handling
Thanks to the precise change accuracy of <0.005 mm radial run-out and <0.008 mm axial run-out, , time-consuming adjustment of the axial run-out is unnecessary for the user. The cutting edge can be replaced in less than three minutes, which saves up to one hour of downtime compared to similar face milling cutters.

High-hardness CBN cutting materials
The use of CBN (cubic boron nitride) guarantees first-class tool life, surface quality and process reliability.

Processing of cast materials and hardened steel
As CBN cutting materials do not react chemically with carbon or other alloys, MX boronite is ideally suited for machining powder metal, hardened steels and cast materials.

High rigidity due to carbide cutting ring
The carbide cutting ring equipped with CBN has a very high tool rigidity and thus prevents vibrations and micro-chipping at high speeds. This increases the tool life and the quality of the workpieces.

High cutting speed with high feed rate
Thanks to its high cutting speed and generous feed rate, MX boronite is ideal for high-speed milling and meets the highest requirements for surface quality and precision.

Best surface finishes
The high-precision axial run-out guarantees a perfect surface finish, even at high tooth feed rates.

Key Facts

Diameter 50 / 63 / 80 / 100 / 125 mm
Concentricity < 0.005 mm
Axial runout < 0.008 mm 
Cutting speed 3'000 m/min
Feed rate 0.05 – 0.3 mm per tooth
Number of teeth 5 / 6 / 8 / 9 / 10
ap up to 4mm
Metals to be machined Cast iron, powder metallurgical materials, hardened steel
Delivery time Standard in stock

 

 

Contact for media representatives

Miriam Schaller – Senior Marketing