Experience exceptional accuracy in large internal diameter measurements with our professional three-point internal micrometer. Designed for both blind and through holes from 50-300mm, this micrometer features a self-centering mechanism that ensures perfect alignment and reliable measurements. The carbide-tipped measuring contacts provide excellent wear resistance, while the lightweight aluminum body offers perfect balance between durability and user comfort. With included calibration rings for models up to 100mm and ratchet thimble for consistent measuring force, this tool is ideal for precision machining, quality control, and manufacturing applications requiring large bore measurements.
Technical Specifications:
Order Number
Measuring Range
Accuracy
Setting Ring
L1 Dimension
Extension Rod
H-315-10-270
50-63mm
0.005mm
Φ62mm
114mm
150mm
H-315-11-270
62-75mm
0.005mm
Φ62mm
114mm
150mm
H-315-12-270
75-88mm
0.005mm
Φ87mm
114mm
150mm
H-315-13-270
87-100mm
0.005mm
Φ87mm
114mm
150mm
H-315-61-070
100-125mm
0.005mm
Φ100mm
145mm
150mm
H-315-62-070
125-150mm
0.005mm
Φ150mm
145mm
150mm
H-315-63-070
150-175mm
0.005mm
Φ150mm
145mm
150mm
H-315-64-070
175-200mm
0.005mm
Φ200mm
145mm
150mm
H-315-65-070
200-225mm
0.007mm
Φ200mm
145mm
150mm
H-315-66-070
225-250mm
0.007mm
Φ250mm
145mm
150mm
H-315-67-070
250-275mm
0.007mm
Φ250mm
145mm
150mm
H-315-68-070
275-300mm
0.007mm
Φ275mm
145mm
150mm
Key Features:
Carbide-tipped measuring faces for exceptional wear resistance
Ratchet thimble mechanism for consistent measuring force
Lightweight aluminum body for reduced operator fatigue
Self-centering three-point design for automatic alignment
Calibration rings included for models up to 100mm (optional for larger sizes)
Suitable for both blind and through hole measurements
Professional Features:
Precision Engineering: Maintains accuracy up to 0.005mm across most measurement ranges
Extended Range Capability: Covers large internal diameters from 50mm to 300mm
Thermal Stability: Aluminum construction minimizes heat transfer during handling
User-Friendly Design: Ergonomic handling and clear reading scale
Interchangeable Components: Standard extension rods for flexible configuration
Professional Grade: Designed for industrial workshop environments
Applications:
Large bore machining and inspection
Automotive engine cylinder measurement
Hydraulic cylinder manufacturing
Industrial pipe and tubing inspection
Aerospace component measurement
Heavy equipment manufacturing
Quality control and precision metrology
Additional Information:
Calibration Note:
Calibration rings included standard for measurements up to 100mm
Optional calibration rings available for measurements above 100mm
Technical Specifications:
All models feature carbide measuring faces for extended durability
Lightweight aluminum construction reduces operator fatigue
Ratchet mechanism ensures consistent measuring force
Designed for both blind and through hole applications
