Digital Rockwell Hardness Tester Phase II - Model 900-331D

Key Features

• Digital Rockwell hardness tester
• Digital hardness display
• Tests all standard Rockwell hardness scales
• 10 kgf minor load
• Selectable 60, 100, and 150 kgf major loads
• Dead-weight loading system
• Hydraulic dashpot load control
• Rugged bench-top construction
• Designed for laboratory and production environments
• Manufactured in accordance with ASTM E18 guidelines

Overview

The Phase II Model 900-331D Digital Rockwell Hardness Tester is a digital bench-top hardness tester designed for performing standard Rockwell hardness testing with improved operator convenience and measurement repeatability. The tester utilizes a 10 kgf minor load with selectable 60, 100, and 150 kgf major loads, providing accurate hardness testing across all standard Rockwell scales when equipped with the proper indenter.

The large digital display simplifies hardness reading while the rugged mechanical construction makes the tester well suited for manufacturing, inspection laboratories, heat-treating facilities, quality control departments, machine shops, and educational laboratories. Phase II states the Model 900-331D is manufactured in accordance with the guidelines of ASTM E18.

Applications

The Model 900-331D is suitable for testing:

• Hardened steel
• Tool steel
• Stainless steel
• Carbon steel
• Alloy steel
• Cast iron
• Aluminum alloys
• Copper alloys
• Brass
• Bronze
• Heat-treated components
• Finished machined parts

Material suitability depends on the selected Rockwell scale and proper indenter.

Industries Served

• Aerospace
• Automotive
• Heat Treating
• Metal Fabrication
• Precision Machining
• Tool & Die
• Steel Processing
• Foundries
• Quality Assurance Laboratories
• Manufacturing Facilities
• Educational Laboratories

Included Accessories

• C-scale diamond indenter
• 1/16 in. ball indenter
• Three HRC hardness test blocks
• One HRB hardness test block
• 5.87 in. (150 mm) test table
• 2.5 in. (63 mm) flat anvil
• Standard V-anvil
• Accessory case
• Dust cover

Optional Accessories

Available accessories include:

• Certified Rockwell hardness test blocks
• Replacement diamond indenters
• Replacement ball indenters
• Additional anvils
• Hardness tester accessory kits
• Calibration accessories

Calibration & Verification

To maintain reliable hardness measurements, the tester should be periodically verified using certified Rockwell hardness test blocks appropriate for the hardness scales being used. Regular inspection of the indenter, anvils, and loading system is recommended.

WESTport offers:

• Certified Rockwell hardness test blocks
• Replacement diamond and ball indenters
• Calibration services
• Repair services
• Technical application support

Why Buy from WESTport?

WESTport provides complete hardness testing solutions, including:

• Expert application assistance
• Certified hardness test blocks
• Replacement indenters and anvils
• Calibration and repair services
• Fast technical support
• Long-term product support

Frequently Asked Questions

What is the difference between the 900-331 and the 900-331D?

The 900-331D features a digital hardness display, while the 900-331 uses an analog dial display.

What test loads are available?

The tester uses a 10 kgf minor load with selectable 60, 100, and 150 kgf major loads.

Which hardness scales can be tested?

The tester is designed to perform all standard Regular Rockwell hardness scales when equipped with the proper indenter.

Is the loading system electronic?

No. The Model 900-331D utilizes a dead-weight loading system with hydraulic dashpot control.

Can WESTport provide calibration and replacement accessories?

Yes. WESTport supplies certified hardness test blocks, replacement indenters, calibration, repair, and technical support.

Explore our complete line of hardness testers and certified hardness test blocks, or call 1-888-400-4243 to speak with a hardness testing specialist.