KERN & SOHN HK-D User Manual

Sauter GmbH

Ziegelei 1

Instruction Manual

HK-D

D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com

MOBILE LEEB HARDNESS TESTER

1 General description

1.1 Features

 LCD display of 128×64 matrix is use d.
 Converts to all common hardness scales (HV, HB,

HRC, HRB, HRA, HS).

 English displaying and menu operating, the

operation is easy and convenient.

 With RS232 interface, multiple communication

modes are adopted to meet customized
requirements of various users.

 Equipped with 7 types of impact devices which need

not to be recalibrated when changing them, the
system can identify the type of impact device
automatically.

 Max 600 groups（impact times: 32～1）of data can

be stored at internal non volatile data storage.

 Upper and lower limit of hardness can be pres et; If

the tested value exceeds the limits, alarm will be
sent out automatically to make convenient for the
requirements of batch measurements.

 Back light display has been used to make

convenient for the use in poor light.

 Test values software calibration function.
 Material of “cast steel” is added; HB values can be

read out directly when D/DC impact device is used to
measure “cast steel” work piece.

 Printer be separated from main unit and copies of

testing results can be printed as required.

 Power is two of AA battery. Continuous working

period: approx. 200 h (no back light on).

 Software of PC can be installed according to the

requirements of user, the function will be more
powerful to satisfy the more st rict demands of qualit y
control and management.

1.2 Main Application and Testing Range

1.2.1 Main Application

 The assembled machinery and permanently inst alled

parts

 Die cavity of molds
 Heavy work piece
 Failure analysis of pressure vessel, steam turbo-

generator set and other equipment

 Narrow testing space where work piece installed
 Bearings and other parts
 Cases which require the test result with normalized

original recording

 Material identification of the metal material

warehouse

 Quick tests of large range and multipoint measuring

positions for heavy work piece

1.2.2 Testing Range

Testing range see table 1 and table 2.

HK-D-BA-e-1311 1

Sauter GmbH

Instruction Manual

HK-D

Material

HV

HB

131～387

127～364

HB

19～164

23～210

32～168

Bronze

alloys)

Wrought

Steel and
cast steel

Hammered

steel

Cold work

tool steel

Stainless

steel

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Table 1

Hardness

method

HRC

HRB

HRA

HB

HV 83～976 80～937 80～996 80～950

HS

HB 143~650

HRC

HV 80～898 80～935

HRB

HB 85～655
HV 85～802

D/DC D+15 C G DL

17.9～68
.5

59.6～99
.6

59.1~85.
8

127～65

1

32.2～99
.5

20.4～67
.1

46.5～10

1.7

Material

Gray cast

19.3～67
.9

80～638 80～683 90～646 81～646

33.3～99

iron

.3

19.8～68
.2

Hardness

method

20.0～69
.5

31.8～10

2.1

20.7～68
.2

100～94

1

HRC

HB 93～334 92～326

47.7～99
.9

Table 1

D/DC D+15 C G DL

20.6～68

37.0～99

30.6～96

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Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com

.2

.9

.8

HK-D-BA-e-1311 2

Nodular cast

iron

Cast

aluminum

alloys

Brass(coppe

r-zinc

alloys)

(copper-

aluminum/c

opper-tin

copper

alloys

HRC

HV

HRB 23.8～84.6 22.7～85.0 23.8～85.5

HB 40～173

HRB 13.5～95.3

HB 60～290

HB 45～315

Sauter GmbH

Instruction Manual

HK-D

Table 2

No.

Material

HLD

Strength σb(MPa)

2

High-carbon steel

3

Cr steel

4

Cr-V steel

5

Cr-Ni steel

6

Cr-Mo steel

7

Cr-Ni-Mo steel

8

Cr-Mn-Si steel
9

Super strength steel

10

Stainless steel

No.

Remarks

1

Main unit

1

3

Small supporting ring

1

1

Communication cable

with

DataView Software ATC 01

2. in case of choosing G type
impact device

Various non-conventional types of impact
devices

Various non-conventional types of impact
supporting rings

Non conventional
impact devices

Test tip Hardness

1600HV

1600HV

1600HV

1600HV

mpact device

50g

Max. hardness of
workpiece

Mean roughness of
the Ra

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com

1 Mild steel

1.3 Types and specification

Standard Delivery

Additional
Optional Delivery

2 D type impact device 1

2 Printer
3+4 Nylon brush1 and 2

5

350～522 374～780
500～710 737～1670
500～730 707～1829

500～750 704～1980
500～750 763～2007
500～738 721～1875

540～738 844～1933
500～750 755～1993

630～800 1180～2652
500～710 703～1676

See table 3

Table 3

Impacting energy
Mass of impact
body

Diameter of tes t tip
Material of test tip

I
Diameter
Impact device
Length
Impact device
Weight

workpiece surface of

HK-D-BA-e-1311 3

6

DC(D)/DL D+15 C G

11Mj

5.5g/7.2g

3mm
Tungsten
carbide

20mm
86(147)/

75mm

940HV 940HV 1000HV 650HB

1.6μm 1.6μm 0.4μm 6.3μm

11mJ

7.8g

3mm
Tungsten
carbide

20mm
162mm
80g

2.7mJ

3.0g

3mm
Tungsten
carbide

20mm
141mm
75g

See table 4

90mJ

20.0g

5mm
Tungsten
carbide

30mm
254mm
250g

Sauter GmbH

Instruction Manual

HK-D

Min. weight of sample

Measure directly

5kg

Min. thickness of
sample coupling

Available type of

D:

Hole or

groove or

D+15:

groove or

C:

parts or

G:

heavy or

Need support firmly
Need coupling tightly

>5kg
2～5kg

0.05～2kg

Ziegelei 1
D-72336 Balingen
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>5kg
2～5kg

0.05～2kg

>1.5kg

0.5～1.5
kg

0.02～0.

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>15kg
5～15kg

0.5～5kg

tightly
Min.layer thickness
for surface harden

Hardn
ess
300HV

Hardn
ess
600HV

Hardn
ess
800HV

impact device

Indentation
diameter

Indentation
depth

Indentation
diameter

Indentation
depth

Indentation
diameter

Indentation
depth

5mm

≥0.8mm

0.54mm 0.54mm 0.38mm 1.03mm

24μm 24μm 12μm 53μm

0.54mm 0.54mm 0.32mm 0.90mm

17μm 17μm 8μm 41μm

0.35mm 0.35mm 0.35mm --

10μm 10μm 7μm --

General
test
DC:

hollow­cylindrical
test

DL:

Slender
narrow

hole test

5mm

≥0.8mm

reentrant
surface

1mm

≥0.2mm

small,
light, thin

surface
of
hardened
layer

10mm

≥1.2mm

large,
thick,

rough
surface
steel

HK-D-BA-e-1311 4

Sauter GmbH

Ziegelei 1

Instruction Manual

HK-D

Sketch of
supporting ring

For testing cylindrical outside

For testing cylindrical outside

For testing cylindrical outside

For testing cylindrical inside
R12.5～R17

For testing cylindrical inside

SR10～SR15

For testing spherical outside
SR14.5～SR30

For testing spherical inside

For testing spherical inside

For testing spherical inside
SR16.5～SR30

1

2

D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com

Table 4

No.

1

2

3

4

5

6

non conventional

For testing cylindrical inside

Remarks

surface
R10～R15

surface
R14.5～R30

surface
R25～R50

surface
R11～R13

surface

surface
R16.5～R30

For testing spherical outside

7

8

9

10

11

surface

surface

surface
SR11～SR13

surface
SR12.5～SR17

surface

For testing cylindrical

outside surface,

12

1.4 Operating conditions:

Ambient temperature: -10℃～40℃
Relative humidity: ≤90％
No vibration, no strong magnetic field and no corrosive

medium and heavy dust in ambient environment.

2 Structure features and Testing principle

2.1 Structure features

2.1.1 Hardness Tester

radius adjustable

R10～∞

1: Main unit

2: Impact device

HK-D-BA-e-1311 5