BMT TOOL HOLDER

BMT tool holders (Base Mount Tooling) are precision clamping devices designed for CNC turning centers with BMT turrets. Compared to VDI tool holders, BMT holders are bolted directly to the turret face, providing higher rigidity and machining stability.

What is a BMT Tool Holder?

A BMT tool holder (Base Mount Tooling) is a standardized clamping system designed for CNC lathes with BMT turrets. Unlike VDI tool holders, which use a cylindrical shank, BMT holders are bolted directly to the turret, ensuring higher rigidity and machining stability.

What is the difference between VDI and BMT tool holders?

VDI tool holders use a quick-change cylindrical shank system (DIN 69880 standard).

BMT tool holders are mounted directly onto the turret face with four bolts, offering greater rigidity and accuracy.For heavy-duty cutting and high-torque applications, BMT tool holders are often preferred.

What are the common BMT tool holder sizes?

BMT holders are available in multiple sizes, depending on the CNC lathe:

BMT45 tool holders – compact CNC lathes.

BMT55 tool holders – medium-size machines, most common.

BMT65 tool holders – heavy-duty CNC turning centers.

BMT75 and BMT85 tool holders – for large lathes, high-rigidity cutting.

What are the applications of static vs driven BMT tool holders?

Static BMT tool holders: Used for turning, boring, drilling.

Driven (powered) BMT tool holders: Equipped with internal drive units for milling, tapping, slotting, and cross-drilling.

Both types are widely used in Mazak BMT turrets, Doosan, Haas, Okuma, and DMG Mori CNC lathes.

What are the BMT tool holder dimensions?

BMT tool holder dimensions are standardized to ensure interchangeability. Key specifications include:Bolt pattern and mounting interface.Center height relative to the turret.Tool shank diameter and length.These ensure that a BMT55 tool holder from one manufacturer can fit CNC lathes using the same standard.

Which CNC machines use BMT tool holders?

BMT tool holders are compatible with CNC turning centers from brands such as:

Mazak BMT turret tool holders;Doosan Puma;Haas ST series;Okuma LB series;DMG Mori NLX series.

How to maintain BMT tool holders for long life?

Keep the mating surfaces and bolts clean to maintain rigidity.Use proper torque when tightening bolts.Apply lubrication to prevent rust and wear.Inspect tool holder alignment and replace worn-out parts.

Benefits of BMT Tool Holders

High rigidity and accuracy.

Suitable for heavy-duty cutting.

Wide compatibility with CNC brands.

Long service life with proper maintenance.

Ideal for industries such as automotive, aerospace, energy, and precision engineering.

Why Choose Our Tool Holder Shop?

Large stock of BMT45, BMT55, BMT65, BMT75, and BMT85 tool holders.

Compatible with Mazak, Haas, Okuma, Doosan, DMG Mori.

Wholesale supply and OEM customization.

1-year warranty and technical after-sales support.