New MB4120 CBN Grade for Sintered Alloy and Cast Iron Turning

Mitsubishi Materials Corporation, Advanced Materials & Tools Company (President - Shinichi Nakamura, Headquarters: Otemachi, Chiyoda-ku, Tokyo) has launched new MB4120, a CBN grade for turning sintered alloy and cast iron.

MB4120, is the optimum CBN grade choice for continuous cutting and interrupted machining when turning automotive components. Parts such as valve and oil pump components that are composed of sintered alloy can be effectively machined using the MB4120 series. This series is now available and includes both negative and positive inserts.

Features of the MB4120

1. Fine CBN particles increase cutting edge toughness and the high fracture resistance allows stable performance even during interrupted machining.

2. The optimization of the sintering conditions strengthens adhesion between the fine CBN particles. This increases both fracture and wear resistance.

3. A wide range of edge honing types are available, including a sharp edge type, a round honing style and three different types of chamfer honing.

Product name MB4120 - CBN grade for sintered alloy and cast iron
Number of items Negative insert; 90 items
Positive insert; 100 items
Release June 1st 2018
Standard price
(Main item)
4,830~6,920 yen    
NP-CNGA120404SF2 MB4120 4,830yen (5,216 yen including tax)
NP-DNGA150408SE2 MB4120 4,830yen (5,216 yen including tax)
NP-TNGA160404GS3 MB4120 6,260yen (6,761 yen including tax)
NP-CCGW09T308TS2 MB4120 5,380yen (5,810 yen including tax)
NP-VBGW110304FS2 MB4120 5,380yen (5,810 yen including tax)

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