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ROCKWELL
HARDNESS TESTER

Model No. 900-331

This hardness tester comprises the very best in "state of the art" design along with dynamic precision only found at Phase II. The 900-331 Rockwell scale hardness tester is easy to operate, yet engineered to obtain highly sensitive and accurate readings. Conforming to ASTM E-18 Rockwell Hardness standards, the 900-331 tester will offer unmatched repeatability in all standard Rockwell Hardness scales (table shown below). A perfect, rugged performer suited for any environment including heat treat facilities, tool rooms, workshops, laboratories and inspection labs. Lifetime technical support is included on all Phase II Hardness Testers. So test away with confidence and a level of accuracy you will only find at Phase II.


rockwell hardness tester phase II precision analog
Features:
  • Direct analog dial reading
  • Advanced design, easy to operate
  • Engineered to obtain highly sensitive and accurate readings
  • Conforms to ASTM E-18
Perfect for laboratories, workshops, tool rooms, inspection labs, etc.

Specifications:

Minor Load 10Kgf
Major Load 60Kgf, 100Kgf, 150Kgf
Test Force Application Dead Weight
Test Force Control Hydraulic Dashpot System
Results Display Analog Dial Gage
Vertical Capacity 6.7 in.
Throat Depth 6.6 in.
Height 30.0 in.
Width 8.50 in.
Depth 20.0 in.
Shipping Weight 242 lbs.

Accessories:
  • C-scale Diamond Indentor
  • 1/16" Ball Indentor
  • 3- HRC Test Blocks
  • 1- HRB Test Block
  • 1-HRA Test Block
  • Test Table 5.87" (150mm)
  • Flat Anvil 2.5" (63mm)
  • Spot Anvil .38: (10mm)
  • Std. Vee Anvil
  • Accessory Case
  • Dust Cover

Accessories:
 
Scale Symbol

Indenter Type
Ball dimensions indicate diameter

Preliminary Force
N (kgf)
Total Force
N (kgf)
Typical Application
A Spheroconical Diamond 98.07 (10) 588.4 (60) Cemented carbides, thin steel and shallow case hardened steel
B Ball 1/16" (1.588mm) 98.07 (10) 980.7 (100) Copper alloys, soft steels, alum. Alloys, malleable iron, etc.
C Spheroconical Diamond 98.07 (10) 1471 (150) Steel, hard cast irons,pearltic malleable iron, titanium, deep case hardened steel & other material 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 Ball - 1/8" (3.175mm) 98.07 (10) 980.7 (100 Cast iron, aluminum&magnesium alloys and bearing metals
F Ball - 1/16" (1.588mm) 98.07 (10) 588.4 (60) Annealed copper alloys, and thin soft sheet metals
G Ball - 1/16" (1.588mm) 98.07 (10) 1471 (150) Malleable irons, copper-nckel-zinc and cupronickel alloys
H Ball - 1/8" (3.175mm) 98.07 (10) 588.4 (60) Aluminum, zinc and lead
K Ball - 1/8" (3.175mm) 98.07 (10) 1471 (150) Bearing metals and other very soft or thin materials. Use smallest ball and heaviest load that does not give anvil effect
L Ball - 1/4" (6.350mm) 98.07 (10) 588.4 (60)
M Ball - 1/4" (6.350mm) 98.07 (10) 980.7 (100)
P Ball - 1/4" (6.350mm) 98.07 (10) 1471 (150)
R Ball - 1/2" (12.70mm) 98.07 (10) 588.4 (60)
S Ball - 1/2" (12.70mm) 98.07 (10) 980.7 (100)
V Ball - 1/2" (12.70mm) 98.07 (10) 1471 (150)
   
 
HARDNESS TESTER RESOURCES
Hardness Tester Accessories Portable Hardness Testers
Hardness Tester Block Certification Minimum Thickness Chart for Rockwell Hardness Testing
Rebuilt Inventory with Full Warranty Rockwell Hardness Scale Indentor Load Chart
Hardness Tester Conversion Chart Hardness Setup:
  • 900-331
  • Principle of Rockwell Hardness Testing NIST Links
    Roundness Correction Chart for Hardness Testing ASTM Links
    HARDNESS TESTER LINKS
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