Mitech MH-320 Leeb Hardness Tester

Mitech MH-320 Leeb Hardness Tester

Brand: Mitech
Model: MH320

Mitech MH-320 Leeb Hardness Tester  Overview:

The MH320 is a portable Leeb hardness tester designed to quickly and easily measure the hardness of metal materials on-site. It supports the conversion between different hardness scales, including Leeb, Brinell, and Rockwell, making it a versatile tool. Featuring a 128×64 dot matrix LCD screen, it provides clear and detailed information with stable performance. The built-in high-speed thermal printer enables instant printing of measurement results. This device is widely used in metal processing, manufacturing, special equipment, failure analysis of permanent components, and more. It is particularly suited for testing large, immovable parts and improving production efficiency while reducing costs.

Functions & Applications:

• Suitable for testing:
  • Die cavities of molds
  • Bearings and other parts
  • Failure analysis of pressure vessels, steam generators, and other equipment
  • Heavy workpieces
  • Installed machinery and permanently assembled parts
  • Surfaces of small hollow spaces
  • Metal materials in warehouses for material identification
  • Large workpieces with rapid testing across multiple points and wide areas

Working Principle:

The MH320 operates based on the Leeb hardness measurement principle, where a test body impacts the material, and the ratio of rebound to impact velocity determines the hardness value. It allows for conversion to various hardness scales like HL, HB, HRB, HRC, HRA, HV, and HS.

Instrument Features:

• Supports multiple impact directions: vertical downward, oblique, horizontal, vertical upward (automatic direction recognition).
• Converts between various hardness scales: HL, HB, HRB, HRC, HRA, HV, HS.
• Wide measuring range: (170 – 960) HLD.
• Single-point calibration for ease of use.
• Integrated high-speed thermal printer for immediate result printing on-site.
• Low power consumption design, with up to 150 hours of working time (default brightness).
• Lightweight and portable, making it ideal for on-site use.
• Robust ABS plastic shell for durability in harsh environments.

Specifications:

• Measuring Range: (170 – 960) HLD
• Resolution/Accuracy: ±6 HLD
• Impact Directions: Vertical downward, oblique, horizontal, vertical upward (automatic identification)
• Error: D, ±6 HLD
• Repeatability: D, 6 HLD
• Materials Tested: Steel and cast steel, cold work tool steel, stainless steel, grey cast iron, nodular cast iron, cast aluminum
• Hardness Scales: HL, HB, HRB, HRC, HRA, HV, HS
• Impact Energy: D – 11 mJ
• Impact Weight: D – 5.5g / 7.2g
• Impact Ball Hardness: D – 1600 HV
• Impact Ball Diameter: D – 3mm
• Impact Ball Material: Tungsten carbide
• Sample Surface Roughness:
  • D – 1.6 μm
  • C – 0.4 μm
• Minimum Depth of Hardness Layer:
  • D – ≥0.8mm
  • C – ≥0.2mm
• Display: High-contrast segment LCD
• Storage: 100 measurement series (up to 500 measurements)
• Power Supply: Two AA alkaline batteries (3V)
• Working Time: Approximately 150 hours (with default brightness)
• Power Consumption: Low-power design
• Standby Period: About 100 hours (without backlight)
• Communication Port: USB 1.1
• Data Printing: On-site thermal printing
• Dimensions: 150 x 74 x 32 mm
• Weight: 4.0 kg (including packaging)
• Working Voltage: 3V (from two AA alkaline batteries)
• Shell Material: ABS plastic
• PC Software: None

Package Specifications:

• Main Unit Weight: 370g
• Package Dimensions: 36.5 x 29 x 12.5 cm
• Total Weight: 5.5 kg

The MH320 Leeb Hardness Tester offers a practical, efficient, and accurate solution for hardness testing across a range of metal materials and industries. Its portability, ease of use, and comprehensive hardness scale conversion make it a valuable tool for on-site metal hardness testing.