Achieve Small Diameter Boring with BIG KAISER’s Mini Indexable Boring Bar

4 mm mini indexable boring bar.

Hoffman Estates, IL – BIG KAISER, a global leader in premium high-precision tooling systems and solutions for the metalworking industries, introduces the 4mm Mini Indexable Boring Bar – ideal for small component machining. To date, BIG KAISER has one of the smallest indexable inserts in the market.


The Mini Indexable Boring Bar helps meet the increasing demand for successfully boring small parts in industries like medical and aerospace, such as machined medical implant devices and micro-sized components.


The main advantage of this product is the cost savings of replacing just the indexable insert in production versus replacing the entire bar where the cutting edge is integral to the bar. The inserts can be easily exchanged without disturbing the overall geometry of the tool, providing optimized cutting results.


Indexable inserts feature sharp cutting edges that help lower cutting forces and vibration and inserts with special developed cutting geometry for carbon steel, alloy steel and aluminum are available.

Did you find this insightful? Let us know what you think by adding your comments or questions below.

Request for quotes and other inquiries should be submitted to our contact us form.


Rachmat Trenggana

Wed, 11/03/2021 - 08:59

I am looking for mini carbide boring bar to make hole dia. 4 to 6. Do you have any that closed to the requirement? Thank you.

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Wed, 11/03/2021 - 09:33

Hi Rachmat,

Thank you for your comment. We'll send you an email with more information on our new small diameter indexable boring bars.

Carlos Madrazo

Wed, 06/01/2022 - 14:49

Estoy buscando una barra para maquinar en torno un diámetro interior de 0.690¨ a una longitud de 8¨ en acero 4140 con una dureza de 30 RC

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Wed, 06/01/2022 - 15:10

Hola, Carlos.

Thank you for your comment. We've sent your comment to our team members in Mexico and they will be in contact with you. Thanks again.

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