Features: Model No. 900-440 TWIN Rockwell/Superficial Rockwell Hardness Tester
This digital Rockwell hardness tester with fully automated load/unload procedures affords highly sensitive and accurate readings. Micro computer controlled Touch Screen with USB output to flash drive. The 900-440 digital Rockwell hardness tester offers programmable scale conversions, dwell times, statistical capabilities and test counter.
Capable of testing in all of the regular Rockwell and Superficial Rockwell hardness scales.
Direct Loading Method With Load-Cell Instead Of Dead Weight System. High Speed Test Cycle and Extremely Accurate Loading Control
Automatic conversions to HB, HV, Popular Rockwell Scales
Touch Screen selectable system
Upper/Lower Limit Settings
Test resolution: 0.01HR Rockwell unit;
Operation temperature: 50° - 95°F (10ᵒC~35ᵒC)
Ambient environment: clean, no vibration, no strong magnetic field,
and no corrosive medium;
Power supply: single phase, AC, 110-220 with manual change, 50~60Hz, 4A;
Minor Load
3kgf / 10 Kgf
Major Load
60 Kgf, 100 Kgf, 150 KGF, 15KGF, 30KGF, 45KGF
Test Force Application
Load Cell Closed Loop
Test Force Control
Motorized
Results Display
Hi Def LCD Digital Readout
Resolution
0.1HR
Vertical Capacity
8.0”
Throat Depth
7.8”
Height
22”
Width
8”
Depth
31”
Weight
175 lbs
Accessories: Included
C-scale Diamond Indenter
1/16” Ball Indenter
2- HRC test Blocks
1- HRB Test Block
1-HRN Test Block
Test Table 5.87” (150mm)
Flat Anvil 2.5” (63mm)
Sli. V- Anvil
Dust Cover
Accessory Case
Scale Symbol
Indentor Type
Preliminary Force N (kgf)
Total Force N(kgf)
Typical Applications
A
Spheroconical Diamond
98.07 (10)
588.4 (60)
Cemented carbides, thin steel, and shallow case hardened steel
B
1/16” Carbide Ball
98.07 (10)
980.7 (100)
Copper alloys, soft steels, aluminum alloys, malleable iron, etc.
C
Spheroconical Diamond
98.07 (10)
1471 (150)
Steel, hard cast irons, pearlitic malleable iron, titanium, deep case hardened steel, other harder than HRB 100
D
Spheroconical Diamond
98.07 (10)
980.7 (100)
Thin steel and medium case hardened steel, and pearlitic malleable iron
E
1/8” Carbide Ball
98.07 (10)
980.7 (100)
Cast Iron, Aluminum and magnesium alloys, and bearing metals
F
1/16” Carbide Ball
98.07 (10)
588.4 (60)
Annealed copper alloys and thin soft sheet metals
G
1/16” Carbide Ball
98.07 (10)
1471 (150)
Malleable irons, copper-nickel-zinc and cupro-nickel alloys