Industry's smallest class! BK Mikro Tool Breakage Detection System

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BK Micro

last updated：Sep 02, 2025

TOMITA CO.,LTD.

BK Micro can prevent the occurrence of defects by safely, reliably, and quickly detecting tool breakage in advance.

Revolutionary tool wear detection device. Available in two types for lathes and machining centers. Equipped with a servo motor and encoder, it allows for easy condition setting and changes by simply connecting to a PC's USB port. Common features include: ■ Cycle time is fast at 90°, ranging from 0.13 to 0.9 seconds ■ Adjustable tool contact pressure ■ Memory for tool contact angle ■ Long lifespan of 5 million cycles ■ Both controller and scanner are compact Features for lathes: ■ Capable of detecting extremely small tools of 0.1mm ■ Easy setup with simple teaching ■ Can detect up to 2 tool positions Features for machining centers: ■ Tool wear detection can be performed without sacrificing processing time by installing it in the tool magazine ■ Capable of setting and storing configurations for up to 512 tools ■ Compatible with Profibus and DeviceNet, allowing direct connection to the machine's NC device, enabling reduced wiring and PC-free setup and adjustments (input from NC device)

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basic information

Tool loss detection sensor, mainly used in NC lathes, dedicated machines, and machining centers, detects breakage or chipping of cutting tools such as drills and taps, and sends signals to the machine.

Price range

Delivery Time

Applications/Examples of results

Adopted as standard options and special options by top machine tool manufacturers both domestically and internationally, with over 90,000 units sold worldwide. We offer sensors in the industry’s smallest classes of φ12mm and φ20mm!

Detailed information

TK91A Scanner for Machining Centers ■ Maximum Tool Length: 700mm ■ Effective detection within the tool magazine ■ Detection of multiple tools with varying lengths ■ Rotary scanning that contacts the tool tip in the axial direction
BKM91D Controller for Machining Centers / DeviceNet Specification ■ Stores up to 512 tool information ■ By connecting to NC devices via DeviceNet, there are no limitations on tool information storage, allowing for control on NC devices.
BKM91P Controller for Machining Centers / Profibus Specification ■ Stores up to 512 tool information ■ By connecting to the NC device via DeviceNet, there are no limits on tool information storage, allowing for control by the NC device.
TK96A / TK96RL Scanner for Lathes ■ Minimum detectable tool diameter: 0.1mm ■ TK96A rotates in one direction ■ TK96RL rotates in two directions ■ Compact design with a diameter of 12mm ■ Rotating scan that makes contact with the tool in a vertical direction
TK7A / TK7RL Scanner for Lathes ■ Minimum detectable tool diameter 0.2mm ■ TK7A rotates in one direction ■ TK7RL rotates in two directions ■ Compact design with a diameter of 20mm ■ Rotating scan that makes contact with the tool in a vertical direction
BKM93 Lathe Controller ■ Detailed settings function via mini USB for PC ■ Teaching can be completed with one push without using a PC ■ Compatible with various types of scanners

Line up（7）

Model number	overview
BKM91D	DeviceNet compatible controller
BKM91PB	ProfiBus compatible controller
BKM92+I/O expansion module	Digital I/O input/output controller
BKM93	Basic controller
TK91	High precision scanner
TK7	Compact high-speed scanner
TK96	Micro diameter detection scanner