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Bore gauges for machine tools

Bore gauges by BLUM are used for fast and automatic measurement of bore features in machine tools. Specially designed for the harsh conditions in these machines, the systems are an effective solution for improving the accuracy of your workpieces and the productivity of your manufacturing lines.

Bore gauges are used to measure bore diameters during mass production of identical workpieces. This device uses floating sensors to record measurement data once positioned within a bore. Measuring heads are usually custom designed based on the application and bore size. Bore gauges can be mounted directly into the machine's spindle but this isn't a requirement. The device generates measurement data independent of the machine tool's positioning therefore it can also be mounted outside of the machine tool, on a robot arm for example.

The system communicates directly with the machine tool's control wirelessly. An individual measuring head is needed to measure each diameter size, but a multi-step measuring head can be used for an application where a single part includes multiple diameter sizes. 

  • Diameter measurement

  • Position measurement

  • Roundness measurement

  • Cylindricity measurement


The bore gauges by BLUM are available as standard in two variants. The adapted measuring head is manufactured specially for specific customer applications.

Blum-Novotest Bore Gauge BG60


Bore gauge for bore diameter measurement.

  • Diameter measurement
  • Position measurement
  • Data analysis and export (Q-DAS)
Blum-Novotest Bore Gauge BG61


Bore gauge for bore diameter, circularity and concentricity measurements.

  • Diameter measurement
  • Position measurement
  • Roundness measurement
  • Cylindricity measurement 
  • Concentricity measurement 
  • Data analysis and export (Q-DAS)

Key Features:

  • Machine-independent accuracy
  • Extremely fast bore measurement
  • Reliable measurements also under coolants
  • Enhanced in-process reliability by elimination of manual and downstream tests
  • Mechanically robust design
  • Enable low-manned operation
  • Realize continuous process chains

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BLUM Measuring Devices


Ensure you produce the right part the first time.

In-process measurement has become an integral element of CNC machining because it helps ensure you produce the right part the first time. This is because the process allows parts to remain inside the CNC without disrupting the machine setup while inspection is being conducted. The measurement device is connected directly to the machine control, therefore data feedback can be analyzed and then displayed via the machine's interface. Rework is possible by compensation of the tool wear or workpiece origin based on the measurement analysis. 


Focus on productivity.

Utilizing in-process measurement can help to increase productivity by improving part accuracy the fist time and reducing scrap from rejects, all with minimal or no operator intervention. In addition, in-process measurement collects important data that can be used to provide insight to better understand and improve the manufacturing process. 


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The BLUM MeasureXpert Advantage:

  • Engineered for the Machine Tool. BLUM probing systems did not evolve from a CMM probe. All BLUM products were designed and manufactured with an IP68 rating to perform reliably and precisely even within the harsh environment of a machine tool. 
  • Time is Money! Thanks to the unique design and opto-electronic signal generation, BLUM Touch Probes achieve probing speeds of up to 3 meters or 120 inches per minute with just a single touch measurement.
  • Fast. Precise. Reliable. DIGILOG technology brings in-process reliability to a new dimension. The constant data pool generating thousands of measuring values per second allows for automation in t he manufacturing process while providing a huge time savings. 


BLUM is an innovative partner to numerous industry sectors and a long-standing supplier to the global machine tool industry. From individual mold and die makers all the way to large corporations in the automotive and aerospace industries - the high efficiency, precision and reliability of production metrology by BLUM makes it an indispensable instrument for many successful companies.