Description
The Mitutoyo 140-159 is a high-precision Extension Pipe Type Main Unit Micrometer designed for large-diameter internal measurements. This instrument utilizes a modular pipe-based system to extend measuring range while maintaining structural rigidity and thermal stability. It is engineered for heavy-duty industrial metrology where standard internal micrometers lack the necessary reach and accuracy.
Technical Specifications:
Manufacturer: Mitutoyo
Model Number: 140-159
Measurement Type: Internal Extension Pipe Micrometer
Measuring Range (Main Unit): 1000 mm to 2000 mm
Resolution / Graduation: 0.01 mm
Accuracy: ±(7 + L/100) µm (L = Maximum measuring length)
Spindle Stroke: 50 mm
Anvil/Spindle Material: Hardened steel with micro-lapped finish
Extension Pipe Material: High-grade carbon steel with insulated grips
Extension Pipe Diameters: Ø 32 mm
Scale Surface: Satin chrome finish to prevent glare and corrosion
Mechanical Architecture and Design:
The 140-159 system utilizes a series of interchangeable extension pipes that are precision-ground to ensure seamless alignment. The internal screw mechanism is manufactured using Mitutoyo’s proprietary Original Engineering standards, ensuring a linear feed with minimal friction. The large diameter pipe construction minimizes deflection over long spans, which is critical for maintaining high-fidelity measurements in horizontal orientations.
Industrial Application:
This model is specifically utilized in the aerospace and power generation sectors for measuring the internal bore diameters of large turbine housings and engine cylinders. The 140-159 solves the critical problem of measuring deep, large-scale bores where standard telescopic gauges or smaller micrometers cannot provide the required structural integrity or reach.
Technical Compatibility and Maintenance:
The unit is compatible with standard Mitutoyo extension rods designed for the 140 series. To ensure long-term accuracy, the instrument should be calibrated at 20°C. Regular inspection of the pipe mating surfaces is required to ensure zero-point consistency across the full 2000 mm range.
Logistics and Quality Assurance:
Lead Time: Typically 4-6 weeks for precision calibrated units
Certification: Includes Manufacturer Inspection Certificate
Weight: Approximately 15.5 kg (Full set configuration)
Key Attributes
Accuracy: 0.01mm
Material: Metal
Resolution: 0.01 mm
Place of origin: Japan
Model number: 140-159
Brand name: Mitutoyo
Customized support: No
Warranty: 1 years
Range: 1000-4000mm
Model: Stick/Tubular, Internal
Display: Mechanical (Analogue)
Packaging and Delivery
Selling Units: Single item
Single package size: 126X36X15 cm
Single gross weight: 16.200 kg
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