Handy Hardness Tester
Specifications
Model name
Measuring indenter

SH-21A-E
Handy Hardness Tester(Motorized/manual switchover type probe)
Diamond indenter for Micro-Vickers(facing-to- surface angle of 136˚)

Display
make-upa. Measured value: 3 digits
b. TIMES: 2 digits(measuring frequency)c. MAX value: 3 digits
d. MIN value: 3 digitse. σ: 4 digits(standard deviation)
f. x: 4 digits(average value)

Test load and control no.
1. Approx 2kgf (roughly 20N)
SH-21A-E2
CE making complied models are
SH-21A-E1
required to add (CE) with control no. 2. Approx 1kgf (roughly 10N)
1. Rockwell hardness 10.0〜70.0 HRC
Measuring range
2. Vickers hardness 100〜999 HV
3. Shore hardness
20.0〜99.9 HS
4. Brinell hardness
85〜550 HBW
Set-up
HRC : ± 1.0HRC, HV : ± (3%rdg)HV,
a. UPPER
Reproducibility
HS : ± 1.0HS,
HBW : ± (3%rdg)HBW(upper limit)
With steel as the principle material, other metallic
b. LOWER
Applicable test materials
materials may also be measured by calibrating(lower limit)
against a standard hardness test block.
c. TIMES
Digital display (LCD, 4 digits) with EL backlight(measuring frequency)
Display of measured values
2000 pieces
d. CANCEL
Data memory
1HV, 0.1HRC, 0.1HS, 1HBW, 1N/mm2 (tensile strength)
Alarm (buzzer sound)
Digital display units
Alarm
Allowable operating temperature 0〜50ºC
RS-232C output
Outputused for data
AC adapter(100〜240V) or lithium ion rechargeable battery
Power source
transmission or printing
operatable for continuous 8 hours (with new battery)
5 hours when featuring a rechargeable BL; 8 hours without BL
Continious operating hours*BL= backlight
Display unit: 97mm(W) x 172mm(H) x 50mm(D),Frequency Motorized / manual
Dimensions
switchover type
Probe diameter: 50mm, length: 170.5mm
approx 69〜71kHz
Display unit: approx. 400g (including battery),
WeightProbe and cable: approx. 430g
389mm(W) x 132mm(H) x 200mm(D)Carrying case dimensions
1 display unit, 1 probe (including standard attachment/UA5410),
Conversion Compliant withStandard components
1 hardness standard test block (arround 55HRC), 1 probe cable 1.5m,
SAE J417, JIS B 7731
1 AC adapter 100〜240V (A10WN-09010Ｉ), 1 recharger (MK-8220),
1 lithium ion battery (MK-8401),1 carrying case (MK-9701),
1 instruction manual, 1 inspection sheet
Options
Standard hardness test blocks around 600HV, 50HS,300HB for scale calibration,
Measuring stand for small objects (SH-P07), Probe attachment for pipes materials (SH-P06),
Probe attachment for inner races (SH-P05), Printer model DPUH245AS with cable,
Printer paper (TP-H241L), Stand for the main unit (SH-P03)
When using the tester installed in automated machinery, please contact our hardness tester sales department for specifications concerning
the testers used for automatic machines.

The SONOHARD SH-21A-E is calibrated using the standard hardness test block produced in compliance with JIS B7730/ ISO 6508-3 andJIS B7735/ ISO 6507-3 by Yamamoto Scientific Tool Laboratory Co., Ltd., Japan, who has the quality management system approved under ISO 9001.
The values measured by SH-21A-E are therefore guaranteed by us.
(Accuracy of measurement under calibration with other makers' test blocks is out of our guarantee.)
The model name on the catalog is SH-21A-E, while it is referred to as SH-21A-E only in the relevant operation manual,
test certificate and ISO certificate, etc.
A standard export model of SH-21A-E is not CE-Marking complied, but a CE-Marking complied model is also available by factory modification onrequest and order beforehand.

※ Please read the user’s manual before undertaking operations.
※ Speciﬁcations may be changed without prior notice due to product revisions.

formerly Kawatetsu Advantech co.,Ltd.

ＵＲＬ : http://www.jfe-advantech.co.jp/

Tokyo Head Oﬃce (Overseas Sales)
JFE Kuramae Bldg., 2-17-4 Kuramae, Taito-ku, Tokyo111-0051, Japane-mail: tokyo@jfe-advantech.co.jp Tel. +81-3-5825-5577 Fax. +81-3-5825-5591

Maintenance
Maintenance forfor large-scalelarge-scale
structures,
structures, vehicles,
vehicles, ships,ships,
steel
steel towers,
towers, bridges,bridges,
aviation
aviation aircraft
aircraft andandsoso onon carried
carried out
out byby makingmakinghardnesshardness measurements
measurements
Used
Used forfor measuring
measuring thethe
hardnesshardness difficult
difficult toto getgetat
at areas,
areas, grooved
grooved areas
areas
andand internalinternal R-sections
R-sections ofofcompact
compact parts,parts, metal
metal casts,casts,gears,gears, crank
crank shafts
shafts andandcomponent
component parts
parts
Special characteristics
Strong points
Measurement possible in just a few seconds.
Makes it possible to reduce measurement time.
Extremely minute indentations (approximately 0.1mm2).
Can be used for product inspections, as indentations are virtually unnoticeable.
Direct reading of hardness values (HV, HRC, HS, and HB).
The hardness value can be obtained with one measurement without using calculation formulas.
Conversion to tensile strength (N/mm2).
The level of the strength of materials can be converted according to tensile strength values.
Measuring tables (wooden, iron, resin, etc) do not affect measurement.
Can be used without worrying about the location of measurement.
The backsides of test samples do not affect measurement.
Measurements can be made without being influenced by the backside of work pieces.
Data can be stored in memory up to 2000 pieces.
Data can be managed easily using customer`s own developed software of data transfer to PC.
10 pieces of calibration memory.
It is not necessary to re-calibrate every time the nature of the work changes.
The handy recharge pack makes it easy to carry out on-site measurements.
This makes it possible to measure steel towers, ships, large-scale parts, complexly arranged parts and other items bothindoors and outdoors in their natural state.
Free measuring ability in all directions.
Not only vertically and horizontally but all directional measurements can be made without any compensation.
Beneficial to reducing costs by making periodic part replacement unnecessary.
Static pressure types of loads eliminate the need for temporary parts and annual replacement.
Hardening and annealing can be controlled according to hardness levels.
It is possible to check the state of hardening and annealing of repaired metal casts according to their hardness levels.
Possible to make output to an external printer (optional).
This makes it possible to quickly record measurement data using a printer on site.
Upper and lower limit alarms can be established.
It is possible to set up alarms to notify if the allowable limits of a work piece have been surpassed.

Made in Japan byHead Oﬃce and Main Plant
3-48, Takahata-cho, Nishinomiya-shi, Hyogo Pref.
663-8202, Japane-mail: honsha@jfe-advantech.co.jp Tel. +81-798-66-1508 Fax. +81-798-65-7025
EC-SH-21 02-A

Perfect for use in making on-site measurements

14.09.data. K

Probe dimensions

The Handy Hardness Tester () model SH-21A-E differs completely from traditional hardness
testers from a viewpoint that instead of measuring the size of the indentation of the test sample using amicroscope, it employs a diamond indenter equipped with a vibrating rod that presses on the test surface
at a fixed force and then measures its hardness by applying ultrasonic vibrations.
When the vibrating rod is applied to a soft-surfaced test
sample with identical qualities and at a fixed force, it makes a
deep indentation and gets locked into the groove. Due tothis, the resonance frequency increases. Conversely, it does
not get locked in when used on hard test samples and theresonance frequency drops. The test sample’s hardness canbe calculated using the correlation between this deviationand the tested hardness.

20N

Measurement principle diagram
Motor

Examples of quality control and maintenance usage by measuring handness※Display unit

※ProbeMotor control

Hook
Fixed force
springIndenter

Piezoelectricelement
Vibrating rod(Hard)

Frequency counter

Amplifier circuit
used for oscillation

Coil

20N

(Soft)

Utilization of the Handy Hardness tester SH-21A

Computation circuit(CPU)

Piezoelectric element

Motor start switch

LCD indicator

Processed goods, Press parts,
Metal mold

Tapered parts

Car wheels

Diagnosing wear and tear using
hardness measurements

Drill blade

Measuring the strength of welding sections(Checking tension strength)

Diamond indenter

Surface of the test sample

Calculation values of SH indentation

Probe dimensions
unit / mm

100.0Hardness
Calculation value,
Calculation value,
Conversion value,
HV
Size of indentation (mm) Depth of indentation (mm)
HRC
100
0.193
0.028
̶
200
0.136
0.019
（11）
300
0.111
0.016
30
400
0.096
0.014
41
0.086
0.012
49
500
600
0.079
0.011
55
700
0.073
0.010
60
800
0.068
0.010
64
900
0.064
0.009
67

170.5

Load P= approx. 2kgf (approx. 20N)

Measuring metal fatigue in steel towers,
bridges and reinforcing bars

Measurements with Measuring stand for small objects

25.0

ø40

Vibrating rod
Nose piece

19.5

Hardness
Calculation value,
Calculation value,
Conversion value,
HV
Size of indentation (mm) Depth of indentation (mm)
HRC
100
0.136
0.019
̶
0.096
0.014
（11）
200
300
0.079
0.011
30
400
0.068
0.010
41500
0.061
0.009
49
600
0.056
0.008
55
0.051
0.007
60
700
800
0.048
0.007
64
900
0.045
0.006
67

37.5

Load P= approx. 1kgf (approx. 10N)

ø45

Coverø50Attachment

Precautions on measurements
1. The affect of surface roughness
x：Average value

Hardness
31.5HRC

50.8HRC

65.5HRC

2. Measurable dimensions

σ：Standard deviation Measurement frequency per 100

Surfaceroughness

0.8a

1.6a

3.2a

Χ

31.5

31.7

30.9

σ

0.4

0.5

0.8

Χ

50.5

50.5

50.3

σ

0.3

0.3

0.6

Χ

65.4

65.3

65.1

σ

0.2

0.2

0.4

● For items with a roughness of 3.2a or greater, you will need to polish the surface before
making measurements. If decarbonization occurs, make measurements after having removed it.

( For loading of 2kgf/approx. 20N )1 Size : 15mm wide x 15mm long or greater
2 Thickness t= 7mm or greater
3 Minimum diameter of sphere : 50mm
3. Angles and deviations● Make measurements within ±3.

HV

Vise
SH-P07 is available as option.
＊Measuring stand (P-07)
Vise is not manufactured by us.

Measuring stand SH-P07(P-07)