Micrometers

Precision Three-Point Internal Micrometer 2-6mm – with Two-Point Expanding Probe for Small Bore Measurement

  • Suitable for precision measurement of blind and through holes.
  • Ratchet force gauge.
  • Carbide measuring face (excluding 6-12mm).
  • Includes a calibration ring gauge. Measuring range 2-6mm. Two-point type, suitable for measuring small holes.
  • 0.001mm resolution with 0.004mm accuracy.

Product Description:

Three-Point Internal Micrometer 2-6mm – with Two-Point Expanding Probe for Small Bore Measurement

Our precision three-point internal micrometer features a specialized two-point expanding probe tip, specifically designed for accurate measurement of small internal diameters from 2-6mm. This unique combination provides the stability of a three-point micrometer system with the accessibility of a two-point expanding probe, making it ideal for measuring small blind and through holes. The carbide-tipped measuring contacts ensure exceptional wear resistance, while the included calibration rings guarantee measurement accuracy. With 0.001mm resolution and ratchet thimble for consistent measuring force, this instrument is essential for precision machining, instrumentation manufacturing, and micro-measurement applications.

 Technical Specifications:

Model NumberMeasuring RangeAccuracySetting RingL Dimension
H-375-01-1102-2.5mm0.004mmΦ2.5mm12.5mm
H-375-02-1102.5-3mm0.004mmΦ2.5mm12.5mm
H-375-03-1103-4mm0.004mmΦ4mm22.5mm
H-375-04-1104-5mm0.004mmΦ5mm22.5mm
H-375-05-1105-6mm0.004mmΦ6mm22.5mm

Key Specifications:

  • Resolution: 0.001mm

  • Accuracy: 0.004mm across all ranges

  • Probe Type: Two-point expanding mandrel design

  • Measuring System: Three-point internal micrometer structure

  • Measuring Faces: Carbide-tipped contacts

  • Operation: Ratchet thimble for consistent measuring force

  • Application: Suitable for both blind and through holes

 Professional Features:

  • Three-Point Micrometer with Specialized Probe: Combines three-point stability with two-point probe accessibility

  • Carbide Measuring Contacts: Wear-resistant carbide tips for long-term accuracy

  • Precision Calibration: Includes dedicated setting rings for each measurement range

  • High Resolution: 0.001mm resolution for ultra-precise measurements

  • Consistent Operation: Ratchet mechanism ensures repeatable measuring force

  • Small Bore Optimization: Specifically designed for 2-6mm diameter measurements

  • Professional Accuracy: Maintains 0.004mm accuracy across all ranges

 Applications:

  • Precision instrumentation manufacturing

  • Small bore machining and inspection

  • Watchmaking and Precision instrument manufacturing

  • Medical device and component manufacturing

  • Micro-mechanical engineering

  • Research and development laboratories

  • Quality control for small precision components

 Additional Information:

Design Feature:
This three-point internal micrometer utilizes a specialized two-point expanding probe tip, allowing access to small diameters while maintaining the stability and accuracy of the three-point micrometer system.

Included Accessories:

  • Dedicated calibration ring for each measurement range

  • Protective storage case

  • Calibration certificate

  • Operation manual

Technical Highlights:

  • All models feature carbide measuring faces for extended durability

  • Ratchet mechanism ensures consistent measuring force

  • Specialized two-point expanding probe design for small diameter applications

  • Each range includes specifically matched calibration ring