View
12
Download
0
Category
Preview:
Citation preview
MODEL 3RMODEL 3RMODEL 3RMODEL 3R
ROCKWELL HARDNESS TESTER
http://www.imaitester.comhttp://www.imaitester.comhttp://www.imaitester.comhttp://www.imaitester.com
imaitesterimaitesterimaitesterimaitester@@@@mbdmbdmbdmbd....niftyniftyniftynifty....comcomcomcom
Basic equipment
Accessories
Diamond cone penetrator 1 piece
1/16” Steel ball penetrator 1 piece
1/16” steel ball 10 piece
Test block (HRC, HRB) 2 piece
Plane anvil 1 piece
V anvil (deep) 1 piece
Hardness conversion table 1 copy
Vinyl cover 1 piece
Case for the equipments 1 piece
Specifications
Body appearance dimensions H650 × L450 × W200 mm
Body weight (Net weight) 66 kg
(Gross weight) 94 kg
Shipping dimensions H1050 × L650 × W450 mm
Testing materials having the following height and width can be tested....
Height 200 mm
Length (from center) 138 mm
Option 1/8” Steel ball penetrator
1/4” Steel ball penetrator
1/2” Steel ball penetrator
Diamond spot anvil
Spot anvil: φ7.5mm Height 5mm
V anvil (Small): φ5mm
IMAI TESTING MACHINE MFG. CO., LTDIMAI TESTING MACHINE MFG. CO., LTDIMAI TESTING MACHINE MFG. CO., LTDIMAI TESTING MACHINE MFG. CO., LTD
DIAMOND CONE HARDNESS TESTERDIAMOND CONE HARDNESS TESTERDIAMOND CONE HARDNESS TESTERDIAMOND CONE HARDNESS TESTER
ROCKWELL METHOD ROCKWELL METHOD ROCKWELL METHOD ROCKWELL METHOD ―――― MODEL 3R MODEL 3R MODEL 3R MODEL 3R
The Rockwell Hardness Tester is a simply constructed machine used for testing easily and quickly the hardness of materials ranging from the softest to the
hardest and boasting of its wide range. The impression marked on the surface of specimens minute, it can also be applied to test finished goods.
The Rockwell Hardness Number derived from the net increase in the depth of impression as the load on a penetrator is increased from a fixed minimum load
to higher load and then returned to the minimum load. The hardness number is directly read on the dial. When a tester is conducted the point is penetrated
with a minor load of 10 kg. load taken as the basic point for penetration of an indenter on the surface of a specimen.
The penetrator for the Rockwell Test include steel balls of several specified diameters and a diamond-spheroconical penetrator having an included angle of
120-deg. with a spherical tip having a radius of 60 kgf 0.2mm.
The test load (major load) is customarily 60 kgf(588.4N) or 100 kgf(980.7N) when a steel ball is used as a penetrator, but other loads may be used when
found necessary, and usually 150 kgf(1471N) when a diamond spheroconical penetrator is employed. The ball penetrator is 1/16” in diameter normally but
other penetrator of large diameter such as 1/8”, 1/4” or 1/2” may be employed for soft metals. Thus variety of loads and penetrators are provided and
experience decides the best combination for use.
kinds of the ROCKWELL HARDNESS Scales and their use
Scale
symbol penetrator
Major
load kgf
Dial
figures Typical application of scales
B 1/16” steel ball 100 Red Copper alloys, Soft steel, aluminum alloys, malleable iron etc.
such as ranging HRB 0-100.
C Diamond cone 150 Black
Steel, hard cast irons, pearlitic malleable iron, titanium deep
case hardened steel and other materials harder than HRB 100
and softer than HRC 70.
A Diamond cone 60 Black Cemented carbides, thin steel and shallow case hardened steel.
D Diamond cone 100 Black Thin steel and medium case hardened steel and pearlitic
malleable iron.
E 1/8” steel ball 100
F 1/16” steel ball 60 Red
Cast iron, annealed copper alloys, aluminum and magnesium
alloys, bearing metals and thin soft sheet metals.
G 1/16” steel ball 150 Red Phosphor bronze, beryllium copper, malleable irons, upper limit
HRG 92 to avoid possible flattening of ball.
H 1/8” steel ball 60
K 1/8” steel ball 150
L 1/4” steel ball 60
M 1/4” steel ball 100
P 1/4” steel ball 150
R 1/2” steel ball 60
S 1/2” steel ball 100
V 1/2” steel ball 150
Red. Bearing metals and other very soft or thin materials. Use
smallest ball and heaviest load that dose not give anvil effect.
Recommended