Rockwell Superficial Twin Hardness Tester Phase II - Model 900-375

Key Features

• Twin Rockwell and Superficial Rockwell hardness tester
• Performs all standard Regular Rockwell scales
• Performs all standard Superficial Rockwell scales
• Direct analog dial reading
• Dual minor-load capability (3 kgf and 10 kgf)
• Selectable 15, 30, 45, 60, 100, and 150 kgf major loads
• Dead-weight loading system
• Hydraulic dashpot force control
• Rugged bench-top construction
• Manufactured in accordance with ASTM E18 guidelines

Overview

The Phase II Model 900-375 Twin Rockwell / Superficial Rockwell Hardness Tester combines Regular Rockwell and Superficial Rockwell hardness testing in one bench-top instrument. The tester is designed for laboratories and production environments requiring the flexibility to test both standard and thin-section materials without changing machines.

The Model 900-375 utilizes a 10 kgf and 3 kgf minor load with selectable 15, 30, 45, 60, 100, and 150 kgf major loads, allowing testing of all standard Regular Rockwell and Superficial Rockwell scales when equipped with the proper indenter. The tester features a dead-weight loading system with hydraulic dashpot control for consistent force application. Phase II states the Model 900-375 is manufactured in accordance with the guidelines of ASTM E18.

Applications

The Model 900-375 is designed for:

• Hardened steels
• Tool steels
• Stainless steels
• Cast iron
• Aluminum alloys
• Copper alloys
• Brass
• Thin sheet materials
• Surface-hardened components
• Heat-treated parts
• Precision machined components
• Finished production parts

Industries Served

• Aerospace
• Automotive
• Medical Device Manufacturing
• Heat Treating
• Tool & Die
• Precision Machining
• Metal Fabrication
• Research Laboratories
• Quality Control Laboratories
• Manufacturing Facilities

Included Accessories

• C/N diamond indenter
• 1/16 in. ball indenter
• Three HRC hardness test blocks
• One HRB hardness test block
• One HRN hardness test block
• One HRT 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
• Certified Superficial Rockwell hardness test blocks
• Replacement diamond indenters
• Replacement ball indenters
• Additional anvils
• Calibration accessories

Calibration & Verification

Routine verification should be performed using certified hardness test blocks appropriate for both the Regular Rockwell and Superficial Rockwell scales being used. Proper inspection of the loading system, indenters, and anvils should be performed as part of scheduled maintenance.

WESTport provides:

• Certified Rockwell hardness test blocks
• Certified Superficial Rockwell hardness test blocks
• Replacement indenters
• Calibration services
• Repair services
• Technical support

Why Buy from WESTport?

WESTport supports customers throughout the life of their hardness tester by providing:

• Certified hardness test blocks
• Replacement indenters and anvils
• Calibration and verification services
• Repair services
• Expert technical assistance
• Long-term customer support

Frequently Asked Questions

What is the advantage of the Model 900-375?

The 900-375 combines Regular Rockwell and Superficial Rockwell testing in a single instrument, reducing the need for separate testers.

What test loads are available?

The tester utilizes 3 kgf and 10 kgf minor loads with selectable 15, 30, 45, 60, 100, and 150 kgf major loads.

Which hardness scales can be tested?

The Model 900-375 performs all standard Regular Rockwell and Superficial Rockwell hardness scales when equipped with the proper indenter.

Does the tester use electronic force application?

No. The tester utilizes a dead-weight loading system with hydraulic dashpot control.

Can WESTport provide calibration and accessories?

Yes. WESTport supplies certified hardness test blocks, replacement indenters, calibration services, 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.