Tall Frame Rockwell/Superficial Rockwell Hardness Tester/Large Twin Digital Rockwell Hardness Scales

Model No.900-384TB


The NEW! Phase II Tall Frame 900-384TB twin rockwell hardness tester can be used directly to measure Rockwell hardness and superficial Rockwell hardness and change those values of Rockwell hardness into other rockwell hardness scales, HB, HV, HLD, and HK values. Loaded with features such as ultra precise measurements, wide measuring range, automatic main test force loading/unloading, digitally displayed results, etc. Utilizing the guidelines of ASTM E-18 ,the 900-384TB rockwell hardness tester is suitable for hardness testing on carbon steel, alloy steel, cast iron, non-ferrous metal and engineering plastics. A perfect performer suited for any environment including heat treat facilities, tool rooms, workshops, laboratories and inspection labs.

For full conformance to the latest E18-20 specification, please call (201) 962-7373

  • The protruding indenter design is ideal for testing inside diameters and recesses, often impossible with more traditional hardness testers. Inside diameters as small as 1-1/2-inches can be tested with the standard indenter. Operators can test close to vertical surfaces, to within 1/4-inch with the standard indenter. Testing is fast, accurate and there are fewer broken diamonds due to an outstanding viewing area.
  • Wide measurement range: 30 Rockwell hardness scales in total, HRA, HRB, HRC, HRD, HRE, HRF, HRG, HRH, HRK, HRL, HRM, HRP, HRR, HRS, HRV, HR15N, HR30N, HR45N, HR15T, HR30T, HR45T, HR15W, HR30W, HR45W, HR15X, HR30X, HR45X, HR15Y, HR30Y and HR45Y.
  • Auxiliary functions: The 900-384TB Rockwell hardness tester is capable of upper and lower limit settings; data statistics, the computing for average value, standard deviation, maximum and minimum; scale conversion (the testing results can be converted into the values of other Rockwell scales, HB, HV, HLD, and HK. Curved surface correction will automatically correct the measuring results for cylindrical surface and spherical surface.

Specifications for twin rockwell hardness tester:

Minor Load 3 Kgf, 10 Kgf
Major Load 15Kgf 60 Kgf
30 Kgf 100 Kgf
45 Kgf 150 Kgf
Test Force Application Load cell
Test Force Control Motorized
Display Hi Def LCD Digital Readout
Display Resolution 0.1HR
Vertical Capacity 16.9″
Memory/Output 500 Tests/USB
Throat Depth 7.8 in.
Power Supply single phase, AC, 110V/220V(selectable)
Weight 285lbs Net (Shipping weight = 350 lbs)
Dimensions 285lbs Net (Shipping weight = 350 lbs)

Standard Accessories:

  • C-scale Diamond Indenter
  • 1/16″ Ball Indenter
  • Built-in Mini Printer
  • Test Table 5.87″ (150mm)
  • Flat Anvil 2.5″ (63mm)
  • Std. Vee Anvil
  • Accessory Case
  • Dust Cover
  • 3 piece-HRC test blocks
  • 1 piece-HRB test block


Rockwell Hardness & Superficial Rockwell Hardness Tester Scale/Indentor/Load Chart:

Scale Symbol Indentor Type Preliminary Force N (kgf) Total Force N (kgf) Similar to A C and D scales but for thinner gage material

Typical Applications

15N Spheroconical Diamond 29.42 (3) 147.1 (15)
30N Spheroconical Diamond 29.42 (3) 294.2 (30)
45N Spheroconical Diamond 29.42 (3) 441.3 (45)
15T 1/16” Carbide Ball 29.42 (3) 147.1 (15) Similar to B, F and G scales but for thinner gage material.
30T 1/16” Carbide Ball 29.42 (3) 294.2 (30)
45T 1/16” Carbide Ball 29.42 (3) 441.3 (45)
15W 1/8” Carbide Ball 29.42 (3) 147.1 (15) Very Soft Material
30W 1/8” Carbide Ball 29.42 (3) 294.2 (30)
45W 1/8” Carbide Ball 29.42 (3) 441.3 (45)
15X ¼” Carbide Ball 29.42 (3) 147.1 (15)
30X ¼” Carbide Ball 29.42 (3) 294.2 (30)
45X ¼” Carbide Ball 29.42 (3) 441.3 (45)
15Y ½” Carbide Ball 29.42 (3) 147.1 (15)
30Y ½” Carbide Ball 29.42 (3) 294.2 (30)
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