insize ISHW User manual

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ISHW
WEBSTER HARDNESS TESTER
OPERATION MANUAL
MN ISHW- -E

Attention
Excessive pressure on the handle may damage the anvil.
Torsion and slide of the workpiece will damage the indenter.
The tester is not at its best accuracy below 4HW and above 17HW.
The distance between the indentation and the edge of the workpiece
should be greater than 5mm.
The distance between any indentations should be greater than 6mm.
The surface of the workpiece must be vertical to the indenter.
The back side of specimen must be in good contact with the anvil.
Dirty workpiece will result in inaccurate readings.
The oxide film of 10μm can affect the test result by up to 0.5~1HW.
The painting on the workpiece must be removed before testing.
Slow force application will result in a slightly lower reading.
Use the calibration sheath with the ISHW-L20A tester when testing
on thin workpiece and test block.
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5 2
Technical specification
Product introduction
3. anvil 1. reading dial 2. indenter
1
2
3
Code
Application
ISHW-L20 ISHW-L20A ISHW-L20B
Thickness requirement
Internal diameter
of flat workpiece
requirement of tube
workpiece
Wall thickness
requirement of
tube workpiece
Hardness range
Min.reading
Accuracy
Dimension
for aluminum for aluminum alloy for aluminum
alloy general use thick workpiece alloy small tube
0.6~13mm
0.6~6mm 0.6~8mm
>Ø10mm >Ø10mm >Ø6mm
0.6~6mm
6~13mm
0.6~8mm
(internal diameter
Ø10mm~23.3mm
0.6~6mm
(internal diameter
>Ø23.3mm)
0~20HW
1HW
±0.5HW(at 5~17HW)
205x30x85mm
4
4. pivot screw
3
20 by regulating the adjustment screw, the indenter is worn and
needs to be changed.
2. Calibration of the load spring
Screw off the pivot screw, and take out the handle from the frame,
then remove the dial head from the indenter cylinder, leaving the
cylinder in the frame. Then the adjustment nut can be seen in the
indenter cylinder. Rotate the adjustment nut with the calibration
wrench. If the reading of the test block is smaller than the number
marked on the test block, rotate the adjustment nut counterclockwise,
otherwise, rotate the adjustment nut clockwise. When the nut is
rotated 30o to 45o, the reading will change by 1unit. Reassemble
the tester and verify the tester both on the test block and on the
anvil after regulating it.
Note: Do not calibrate the readings of the test block by regulating
the adjustment screw.
Changing the indenter
In case the reading can not be set to the full scale of 20 by regulating
the adjustment screw, which means the indenter is worn, the indenter
should be changed. Follow the steps below to change the indenter.
Screw off the pivot screw, and take out the handle from the frame, then
emove the dial head from the indenter cylinder, leaving the cylinder in
the frame. Then the adjustment screw can be seen in the indenter cylinder.
Rotate the adjustment screw off with the calibration wrench, then take
the indenter out and replace with a new indenter.
After the indenter is replaced, the load spring needs to be adjusted with
the adjusting nut. Only one rotation of the calibration nut is enough after
the resistance of the load spring is felt. The indenter tip will be damaged
by excessive pressure of the load spring after indenter replacement.
Maintenance
Prevent dust and dirt.
Prevent rust.
Prevent falling off.
Do not disassemble the dial head.
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3 4
Code
Application
Thickness requirement
Internal diameter
of flat workpiece
ISHW-B70 ISHW-B75 ISHW-B92
requirement of tube
workpiece
Wall thickness
requirement of
tube workpiece
Hardness range
Min.reading
Accuracy
Dimension
for soft brass for soft steel for hard
and copper and cold-rolled
0.6~8mm
0.6~6mm 0.6~6mm
>Ø10mm >Ø6mm >Ø10mm
0.6~6mm 0.6~6mm0.6~8mm
0~20HW
1HW
±0.5HW(at 5~17HW)
205x30x85mm
aluminum alloy
and hard brass steel
Indenters mode
Standard delivery
Main unit
Spare indenter
Hardness test block
Wrench
1pcs
1pcs
1pcs
1pcs
The Webster hardness tester have different mode of indenters.
A. ISHW-L20、B. ISHW-B75 C. ISHW-B92
Screwdriver 1pcs
Calibration sheath(ISHW-L20A )only 1pcs
Verification and calibration
Basic operation
Put the specimen between the anvil and the indenter cylinder, then
press the handle down until the indicator hand come to a stop. Keep
the handle pressed and take the reading.
1. Calibration of the full scale
Press the handle to the bottom without putting any specimen on
the anvil of the hardness tester. Regulate the full-scale adjustment
screw with a small screwdriver to bring the indicator at 20. If the
reading is smaller than 20, the adjustment screw should be regulated
clockwise; if the reading is greater than 20, the adjustment screw
should be regulated anticlockwise. If the pointer can not be set to
1Verification
The operator should verify the accuracy of the tester regularly.
Calibration should be made if the tester is found inaccurate. When
testing on the hardness block, use its upper surface only.
1. Verification of the full scale
Press the handle to the bottom without putting any specimen on
the anvil of the hardness tester. The indicator should point at 20
±0.5HW. If the reading is out of tolerance, full scale calibration
should be carried out.
2. Verification of the test block
Test on the standard test block. For ISHW-L20, ISHW-L20A, IS
HW-L20B testers, the reading should be ±0.5HW of the hardness
number marked on the block. For ISHW-B70, ISHW-B92 testers,
the reading should be 5HW±0.5HW; and for ISHW-B75, the reading
should be 17HW±0.5HW. If the reading is out of tolerance, load
spring calibration should be carried out.
2Calibration
The calibration of the Webster hardness tester includes full scale
calibration and load spring calibration. Full scale calibration is to
set a benchmark, and load spring calibration is to provide a reference
point for the tester. Before calibration of the ISHW-L20A, put the
calibrating sheath on the anvil first.
ISHW-L20A
ISHW-L20B