Tall Frame Twin Digital Rockwell Hardness Tester Phase II - Model 900-440TB
Tall Frame Twin Digital Rockwell Hardness Tester Phase II - Model 900-440TB
Part #:900-440TB
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Key Features
- Performs both Regular Rockwell and Superficial Rockwell hardness testing
- Extended test bed configuration for larger workpieces
- Closed-loop electronic load cell system
- Automatic loading, dwell, and unloading
- Motorized force application
- High-definition LCD touch screen
- Microprocessor-controlled operation
- USB data output
- Automatic hardness scale conversion
- Statistical analysis
- Programmable dwell time
- Upper and lower tolerance settings
- Test counter
- Manufactured utilizing the guidelines of ASTM E18
Overview
The Phase II Model 900-440TB Digital Twin Rockwell / Superficial Rockwell Hardness Tester with Extended Test Bed combines the versatility of Regular Rockwell and Superficial Rockwell hardness testing with an extended test bed for inspecting larger and longer workpieces. Designed for production environments, quality laboratories, and heavy manufacturing, the Model 900-440TB utilizes a closed-loop electronic load cell to automatically apply and control testing forces for highly accurate and repeatable hardness measurements.
The extended test bed configuration increases the machine's flexibility when testing oversized components while maintaining the advanced digital features found throughout Phase II's premium hardness testing systems. The tester includes a high-definition touch screen, automatic loading and unloading, programmable dwell times, automatic hardness scale conversion, statistical analysis, USB connectivity, and programmable tolerance settings. Phase II states the instrument is manufactured utilizing the guidelines of ASTM E18.
Applications
The Model 900-440TB is ideal for testing:
- Large shafts
- Long machined components
- Heavy fabricated assemblies
- Heat-treated steel
- Tool steel
- Castings
- Forgings
- Surface-hardened components
- Production fixtures
- Large industrial components
- Incoming and final inspection
The extended test bed configuration provides greater flexibility for testing larger workpieces while retaining the full capabilities of both Regular Rockwell and Superficial Rockwell hardness testing.
Industries Served
- Aerospace
- Automotive
- Defense
- Oil & Gas
- Heavy Equipment Manufacturing
- Precision Machining
- Tool & Die
- Heat Treating
- Quality Assurance Laboratories
- General Manufacturing
Included Accessories
- Combination Rockwell/Superficial Rockwell diamond indenter
- 1/16 in. ball indenter
- Two HRC hardness test blocks
- One HRB hardness test block
- Two HRN hardness test blocks
- One HRT hardness test block
- Large test table
- Flat anvil
- V-anvil
- Dust cover
- Operator's manual
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
- Hardness tester accessories
Calibration & Verification
Routine verification should be performed using certified Rockwell and Superficial Rockwell hardness reference blocks appropriate for the hardness scales being evaluated. Periodic calibration of the electronic load cell, indenters, anvils, and machine operation helps maintain accurate and repeatable hardness measurements.
WESTport provides:
- Certified Rockwell hardness test blocks
- Certified Superficial Rockwell hardness test blocks
- Calibration and verification services
- Hardness tester repair
- Replacement indenters and accessories
- Technical application assistance
Why Buy from WESTport?
WESTport provides complete hardness testing solutions backed by decades of metrology experience, including:
- Certified Rockwell and Superficial Rockwell hardness reference blocks
- Calibration and repair services
- Replacement indenters and anvils
- Expert technical support
- Responsive customer service
- Long-term product support
Frequently Asked Questions
What is the difference between the 900-440 and the 900-440TB?
The 900-440TB incorporates an extended test bed, allowing larger or longer workpieces to be tested while maintaining the same Regular Rockwell and Superficial Rockwell testing capabilities as the standard Model 900-440.
Which hardness scales can the tester perform?
The Model 900-440TB performs both Regular Rockwell and Superficial Rockwell hardness testing using the appropriate indenter and test force.
How are the testing forces applied?
The tester utilizes a closed-loop electronic load cell that automatically applies and controls the selected testing force.
Can hardness values be exported?
Yes. USB connectivity is included for exporting hardness test results.
Can WESTport provide calibration services?
Yes. WESTport supplies certified Rockwell and Superficial Rockwell hardness reference blocks, calibration services, repair services, replacement accessories, 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.

Specifications
| Test Method | Regular Rockwell & Superficial Rockwell |
|---|---|
| Hardness Scales | Rockwell: HRA, HRB, HRC, HRD, HRE, HRF, HRG, HRH, HRK, HRL, HRM, HRP, HRR, HRS, HRV; Superficial: HR15N, HR30N, HR45N, HR15T, HR30T, HR45T, HR15W, HR30W, HR45W, HR15X, HR30X, HR45X, HR15Y, HR30Y, HR45Y |
| Preliminary Test Force | 3 kgf, 10 kgf |
| Total Test Force | 15, 30, 45, 60, 100, 150 kgf |
| Resolution | 0.01 HR |
| Loading Method | Closed-loop electronic load cell |
| Data Output | High-definition LCD touch screen |
| Max. Test Height | 15.7 in (vertical capacity) |
| Throat Depth | 7.87 in |
| Power Supply | 110–220 VAC, 50/60 Hz |
| Standards | ASTM E18 Guidelines |