iqualitrol iRock-439T User manual
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iRock-439T
Automatic Rockwell Hardness Tester
USAGE Instruction Manual
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Content
One. Brief Introduction
Two. Main Parameters
Three. External Structure
Four. Working Condition
Five. Unpacking and Installation
Six. Operation Procedure
Seven. Interface Introduction and Usage
Eight. Attached List
Nine. Precautions
Ten. Packing List
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One. Brief Introduction
iRock-439T Automatic Rockwell hardness tester with a good aesthetic aspect,
complete functions, easy operation, intuitive display and good reliability, is a high-tech
product combining the mechanic and electric features, which is suitable for the Rockwell
and superficial Rockwell hardness test.
1. Support for all the Rockwell and superficial Rockwell scales;
2. Support for conversion scales of different kinds of hardness;
3. With arc correction function;
4. Touch screen display and operation, dynamically display the working state of the
lifting screw and the indenter;
5. Press operation for the test table, fast rising or dropping;
6. One key to complete the rising of the specimen, loading dwell and unloading of the
indenter, displaying of the hardness value, homing of the test table;
7. With data storage function, automatic calculation of the maximum, minimum,
average of the hardness value, the test results can be printed for output, and with a
RS232 interface users can connect it to the computer for output.
8. Suitable for quenched steel, tempered steel, annealed steel, cold and hard casting,
malleable cast iron, hard alloy steel, aluminum alloy, copper alloy, bearing steel etc.
Also suitable for surface quenched steel, surface heat treating and chemical treating
materials, sheet, zinc layers, chrome layers, tin layers etc.
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Two. Main Parameters
Model iRock-439T
Initial Test Force 3kgf (29.42N), 10kgf (98.07N)
Total Test Force 15kgf (147.1N), 30kgf (294.2N), 45kgf (441.3N),
60kgf (588.4N), 100kgf (980.7N), 150kgf (1471N)
Indenter Diamond Rockwell Indenter,Φ1.588mmBall Indenter
Loading Method Automatic (Loading/Dwell/Unloading)
Operation Automatic Rising and Homing,
One Key to Complete
Hardness Reading Touch Screen
Test Scale
HRA, HRD, HRC, HRFW, HRBW, HRGW, HRHW, HREW, HRKW,
HRL, HRM, HRP, HRR, HRS, HRV
HR15N, HR30N, HR45N, HR15TW, HR30TW, HR45TW,
HR15W, HR30W, HR45W, HR15X, HR30X, HR45X, HR15Y,
HR30Y, HR45Y
Conversion Scale
HV, HK, HRA, HRBW, HRC, HRD, HREW, HRFW, HRGW, HRKW,
HR15N, HR30N, HR45N, HR15TW, HR30TW, HR45TW, HS,
HBW
Data Output Built-in Printer，RS232 Interface
Hardness Resolution 0.1HR
Dwell Time 0~99s
Max. Sample Height 310mm
Throat Depth 150mm
Power Supply AC220V，50Hz
Execute Standard ISO 6508，ASTM E18，JIS Z2245，GB/T 230.2
Dimension 535×330×890mm，
Packing Dimension: 820×460×1170mm
Weight Net Weight: 80kg，Gross Weight: 100kg
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Three. External Structure
1. Hand wheel 2. Power switch 3. Fuse 4. Power cable
5. Printer 6. Emergency stop
button 7. Lifting screw 8. Test table
9. Indenter 10. Fasten screw 11. Touch screen 12. Upper cover
Four. Working Condition
1. Under the room temperature between 10~30℃.
2. The relative humidity of the room is inferior to 65%.
3. Placed on a stable table, free from vibration and without corrosive agent in
surroundings.
4. Connect the stable voltage power supply with good grounding.
Five. Unpacking and Installation
1. Cut the belts on the packing box.
2. Loosen the screws on the middle bottom iron sheet on both sides of the case.
3. Lift the case up and you can see the machine; take out the accessory box and dust
cover.
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4. Unscrew the two M10 bolts under the bottom plate with a spanner.
5. Lift the hardness tester and place it on the prepared stable table (suggested height
450mm).
There should be a hole on the table as following proposal:
6. Remove the straps on the lifting screw and hand wheel.
8. Take out the test table and install it on the lifting screw.
9. Take out the power cable and connect it to the power.
Six. Operation Procedure
1. Turn on the power switch, and the touch screen shows the main interface.
2. Press to select the scale.
3. Choose the corresponding indenter, push the indenter to the main shaft hole, close to
the bearing surface, face the notch plane of the indenter handle to the screw, and
tighten the fasten screw slightly.
4. Press to set the dwell time, arc correction and upper and lower
limit etc.
5. Wipe the test sample clean, place it at the edge of the test table, and then slowly push
it under the indenter.
6. Press to make the test sample close to the indenter, adjust the test position
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of the sample and then press to start the test.
7. The machine will automatically apply the loading, dwelling and unloading, and then
show the hardness result.
8. The test table automatically descends and the test is completed.
9. The first result for Rockwell is not valid, adjust the sample position and press the start
key again, the machine will automatically finish the test and show the test result.
Seven. Interface Introduction and Usage
1. Main interface function：
HRC
50.0
5
Scale selection
Hardness result
Dwell time
Scale
Qualification
Start
Delete current
Check all
Date and time
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Press the up and down arrows to rise and descend the test table. The double arrows are
quick rise and quick descend.
The test force and displacement window shows the real-time changes of the force sensor
and displacement sensor of the instrument.
The hardness value window displays the latest 6 groups of hardness results. Press the
folder to view all the data, select to print or delete, and it automatically calculates the
maximum, minimum and average values.
Press Set to set the dwell time, arc correction, qualification judge, etc.
Press Help to view the operation procedure, precautions, indication adjustment, etc.
2. Set interface：
Dwell Time is the dwell time setting of the total test force.
F0 Dwell Time of the preliminary test force can be set separately according to the
national standard.
Table Descending Time represents the time of table descent after unloading the test
force, which can basically control the height of table descent.
The hardness value of the cylinder sample can be corrected by Arc Correction.
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Limit Setting can be set for qualification judge. The hardness value beyond the range will
be displayed in red font, and will be prompted.
The Factory Set is for factory debugging, and users do not need to set it.
3. Help interface：
Press Help to check the operation tips, operation procedure, instrument parameters,
Rockwell and superficial Rockwell hardness related information.
Press Warning to see the precautions for using the instrument.
Press About to know the executive standard and version number of the instrument.
Press Calibration to do the software calibration of the hardness result.
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Eight. Attached List
1. Technical specifications of Rockwell hardness
Test
Force
InitialTestForce(N) 98.07（10kg）Tolerance±2.0%
TotalTestForce(N)
588.4（60kg）
Tolerance±1.0%
980.7（100kg）
1471（150kg）
Indenter
DiamondConeIndenter
Ф1.5875mmBallIndenter
Scale
HRA HRBW HRC HRD HREW
HRFW HRGW HRHW HRR HRM
HRP HRS HRKW HRL HRV
2. Allowed tolerance and repeatability of Rockwell hardness
Scale
HardnessRangeof
StandardHardness
Blocks
AllowedToleranceof
DisplayingValue
AllowedRepeatability
ofDisplayingValuea
A
20~≤75HRA ±2HRA ≤0.02(100－H)
or0.8Rockwellunitb
＞75~≤95HRA ±1.5HRA
B
10~≤45HRB ±4HRB
≤0.04(130－H)
or1.2Rockwellunitb
＞45~≤80HRB ±3HRB
＞80~≤100HRB ±2HRB
C 10~≤70HRC ±1.5HRC ≤0.02(100－H)
or0.8Rockwellunitb
a：Hmeansaveragehardnessvalueb：selectalargervalue
The normally used Rockwell hardness scales are A, B, C 3
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3. The scales, indenters, test force and application examples of Rockwell hardness
test
Scale Indenter InitialTest
Force(N)
TotalTest
Force (N)
ApplicationExamples
HRA
Diamond
Indenter
98.07N
（10kg）
588.4(60kg) Hardmetalandhardalloy
HRD 980.7(100kg
)
Steel sheet,
surface‐quenchedsteel
HRC 1471(150kg) Heat treated structural
steel,toolsteel
HRFW
BallIndenter
φ1.5875mm
(1/16inch)
588.4(60kg) Non‐ferrousmetals
HRBW 980.7(100kg
)
Non‐ferrous metals; soft
metals
HRGW 1471(150kg) Pearlite iron, copper,
nickel,zincalloy
HRHW
BallIndenter
φ3.175mm
(1/8inch)
588.4(60kg) annealedcopperalloy
HRKW 1471(150kg) Non‐ferrous metals, hard
plastics
HREW 980.7(100kg
)
Aluminum and aluminum
alloy
HRL
BallIndenter
φ6.35mm
(1/4inch)
588.4(60kg)
HRM 980.7(100kg
)
HRP 1471(150kg)
HRR
BallIndenter
φ12.7mm
(1/2inch)
588.4(60kg)
HRS 980.7(100kg
)
HRV 1471(150kg)
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4. Technical specifications of superficial Rockwell hardness
Test
Force
InitialTestForce(N) 29.42（3kg）Tolerance±2.0%
TotalTestForce(N)
147.1（15kg）
Tolerance±1.0%
294.2（30kg）
441.3（45kg）
Indenter DiamondConeIndenter,Ф1.5875mmBallIndenter
Scale
HR15N HR15T HR15W HR15X HR15Y
HR30N HR30T HR30W HR30X HR30Y
HR45N HR45T HR45W HR45X HR45Y
5. Allowed tolerance and repeatability of superficial Rockwell hardness
Scales HardnessRangeof
StandardHardnessBlocks
AllowedTolerance
ofDisplaying
Value
Allowed
Repeatabilityof
DisplayingValuea
15N
70~77HR15N
±2HRN ≤0.04(100－H)
or1.2Rockwellunitb
78~88HR15N
89~91HR15N
30N
42~54HR30N
55~73HR30N
74~80HR30N
45N
20~31HR45N
32~61HR45N
63~70HR45N
15T
73~80HR15T
±3HRT ≤0.06(100－H)or
2.4RockwellUnitb
81~87HR15T
88~93HR15T
30T
43~56HR30T
57~69HR30T
70~82HR30T
45T
12~33HR45T
34~54HR45T
55~72HR45T
a：Hmeansaveragehardnessvalueb：selectalargervalue
The normally used superficial Rockwell hardness scales are N, T
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6. The scales, indenters, test force and application examples of superficial Rockwell
hardness test
Scales Indenters Initial Test
Force (N)
Total Te st
Force (N) Application Examples
15N
Diamond
Indenter
29.42 N
(3kg)
147.1(15kg)
Hard alloy steel, nitride steel,
carburized steel, various heavy steel
plate, etc
30N 294.2(30kg) Surface-quenched steel, carburized
steel, knife, thin steel plate, etc
45N 441.3(45kg) Quenched steel, tempered steel, hard
cast iron and edge of parts, etc
15T
Ball Indenter
φ1.5875mm
(1/16 inch)
147.1(15kg) Annealed copper alloy, mild steel
sheet, brass、bronze plate, etc
30T 294.2(30kg)
Mild steel sheet, aluminum alloy,
copper alloy, brass and bronze,
malleable cast iron
45T 441.3(45kg) Pearlite iron, copper -nickel alloy
and zinc-nickel alloy plate, etc
15W
Ball Indenter
φ3.175mm
(1/8 inch)
147.1(15kg) Annealed copper alloy, mild steel, etc
30W 294.2(30kg) Aluminum and aluminum alloy,
magnesium mild steel, etc
45W 441.3(45kg) Zinc, aluminum, lead, bronze,
beryllium bronze, etc
15X
Ball Indenter
φ6.35mm
(1/4 inch)
147.1(15kg)
Aluminum, tin, zinc, soft metals,
plastics, hard cardboard, etc
30X 294.2(30kg)
45X 441.3(45kg)
15Y
Ball Indenter
Φ12.7mm
(1/2 inch)
147.1(15kg)
Aluminum, tin, zinc, soft metals,
plastics, hard cardboard, etc
30Y 294.2(30kg)
45Y 441.3(45kg)
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7. Min. thickness of the specimen
The Min. thickness of the specimen should be 10 times superior to the depth of the
indentation. After the test, the back of the specimen should not have any visible signs of
deformation.
Minimum thickness of specimen(mm)
0.2
1.4
1.2
1.0
0.8
0.6
2.2
2.0
1.8
1.6
0.4
100
10 20 9050
Hardness (HR)
0
30 40 60 70 80
8. Arc correction
When test Rockwell hardness value with HRC and HRA scales, the diameter of specimen
to be tested is less than 38mm or when test with HRBW scale, the diameter of specimen
to be tested is less than 25mm, the results of the test should be revised. The revised
values are all positive numbers.
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Hardness
Value
HR
DiameteroftheColumnedSpecimen（mm）
6 10 13 16 19 22 25 32 38
ModifiedValueofRockwellScalesA,B,C（HR）
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
3.0
2.5
2.0
1.5
1.5
1.0
1.0
0.5
0.5
0.5
3.0
2.5
2.0
2.0
1.5
1.0
1.0
1.0
0.5
0.5
0.5
0
3.0
2.5
2.0
2.0
1.5
1.5
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0
2.5
2.5
2.0
1.5
1.5
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0
0
2.0
2.0
1.5
1.5
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0
0
1.5
1.5
1.5
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0
0
0
1.5
1.0
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0
0
0
0
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0
0
0
0
0
0
0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0
0
0
0
0
0
0
0
Hardness
Value
HR
DiameteroftheColumnedSpecimen（mm）
6 10 13 16 19 22 25
ModifiedValueofRockwellScalesB,F,G（HR）
20
30
40
50
60
70
80
90
100
5.0
4.0
3.5
5.0
4.0
3.5
3.0
2.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
4.5
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.5
4.0
3.5
3.0
3.0
2.5
2.0
1.5
1.5
1.0
3.5
3.0
2.5
2.5
2.0
2.0
1.5
1.5
1.0
3.0
2.5
2.5
2.0
2.0
1.5
1.5
1.0
0.5
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When test superficial Rockwell hardness value, the diameter of specimen to be tested is less than
25mm, the results of the test should be revised. The revised values are all positive numbers.
Hardness
Value
HRN
DiameteroftheColumnedSpecimen（mm）
3.2 6.4 10 13 19 25
ModifiedValueofsuperficialRockwellScaleHRN
20
25
30
35
40
45
50
55
60
65
70
75
80
85
3
2.5
2
1.5
1
0.5
3
3
3
2.5
2.5
2
2
2
1.5
1.5
1
1
0.5
0.5
2
2
2
2
1.5
1.5
1.5
1.5
1
1
1
0.5
0.5
0.5
1.5
1.5
1.5
1.5
1.5
1
1
1
1
0.5
0.5
0.5
0.5
0.5
1.5
1.5
1
1
1
1
1
0.5
0.5
0.5
0.5
0.5
0
0
1.5
1
1
1
1
1
1
0.5
0.5
0.5
0.5
0
0
0
Hardness
Value
HRT
DiameteroftheColumnedSpecimen（mm）
3.2 6.4 10 13 16 19 25
ModifiedValueofsuperficialRockwellScaleHRT
20
30
40
50
60
70
80
90
3
1.5
2
1
3
2.5
1.5
1
3
2.5
2
1.5
0.5
3
2.5
2
1.5
1
0.5
3
2.5
2.5
2
1.5
1
1
0.5
2
2
2
1.5
1.5
1
0.5
0.5
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Nine. Precautions
1. The surface of the specimen should be smooth and clean without any feculence,
oxidized peels, concaves and the outstanding machining signs. The supporting plane of
specimen and the test table should be clean to assure a good smoothness between
them.
2. The specimen should be stably fixed on the test table. There should be no movement
during the testing process and the test force should be assured to load perpendicularly
on the specimen.
3. If the specimen is columned, the V-shaped test table must be used.
4. During installation of the diamond cone indenter, the middle finger of hand should
withstand the head of diamond, push the indenter forward to the indenter shaft hole
slightly, avoid damaging the head part of diamond.
5. The operator should observe the operation regulations and calibrate the instrument
with the standard hardness block before and after the test.
6. The standard hardness block should be used only on the working plane with the
distance of the two neighboring indentations and distance of the center of the
indentations to their edges are not inferior to 3 mm.
7. Carry out periodic inspection of the tester, at least once a year in order to assure the
accuracy of the tester.
8. The adjustment of displaying hardness value：
The precision of the displaying hardness value of the tester is just calibrated before
the instrument leaves the factory. If a tolerance is caused due to the transportation,
the operator may regulate it based on the understanding of the instrument structure
and principle.
Method 1: Remove the upper cover. If the measured value is lower than the standard
hardness block, first fix the Screw Rod with an inner hexagon spanner, loosen the nut
slightly, rotate the Screw in slightly clockwise, and then fix the Screw Rod and tighten
the nut. Do the test again and adjust until the value stands in the tolerance range. If
the measured value is higher than the hardness value of the standard block, rotate
the Screw in the opposite direction
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Method 2: Press the "Help" button on the main interface, and press the hardness
scale which should be corrected in "Calibration". Each scale has a hardness value
range (at the top of the screen), which can be modified by up and down keys.
29. Connecting Rod
30. Screw Rod
31. Screw
32. Protecting Gasket
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Ten. Packing List
Name Qty Name Qty
Instrument Main Body 1 set Diamond Rockwell
Indenter
1 pc
Φ1.588mmBall Indenter 1 pc Φ150mm Flat Anvil 1 pc
Φ60mm Flat Anvil 1 pc Φ40mm V-shaped Anvil 1 pc
Hardness Block 60~70 HRC 1 pc Hardness Block 20~30
HRC
1 pc
Hardness Block 80~100
HRBW
1 pc Hardness Block 70~85
HR30TW
1 pc
Hardness Block 65~80
HR30N
1 pc Fuse 2A 2 pcs
Inner Hexagon Spanner 1 pc Spanner 1 pc
Power Cable 1 pc Anti-dust Cover 1 pc
Usage Instruction Manual 1
copy
Table of contents
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