Mitutoyo ARK-600 - Inspection and Maintenance; Maintenance and Lubrication Guidelines; Rockwell Hardness Scales; Scales and Hardness Equations

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6.

INSPECTION

1)

No

dust

should

remain

on

the

contact

surfaces.

Clean

the

contact

surfaces

between

the

specimen

base

(anvil

or

table)

and

elevating

screw,

between

specimen

base

and

specimen,

and

between

indenter

and

indenter

shaft.

2)

Measuring

deformation

of

tester

frame.

Carry

out

the

same

operation

as

hardness

measurement

under

the

condition

illustrated

on

the

right.

3)

Lubrication

A

“ball

oil

filler"

is

provided

on

the

upper

surface

of

the

elevating

screw

handle.

Lubricate

with

machine

oil

as

necessity

requires.

.

Other

parts

do

not

reguire

lubrication.

7.

ROCKWELL

HARDNESS

SCALES

Scales

listed

in

the

table

below

are

provided.

Select

a

scale

as

accustomed.

Preliminary

test

force

(kgf)

98.07N

(10)

Use

Test

force

(kgf)

588.4N

980.7N

1471N

(60)

(100)

(150)

Indenter

Diamond

indenter

ADC

Steel

Steel

ball

indenter

(dia.

mm)

1.854

F

B

G

Soft

steel.

Light

alloys

3.175

H

E

K

Soft

metals

Plastics

6.35

L

M

P

12.7

R

S

V

Hardness

Equation

(D

100

-0.5h

(D

130

-0.5h

(D

®

"h"

denotes

diference

of

indenter

displacement

in

twice

application

of

the

preliminary

test

force,

(units

in

microns)

(D

When

using

diamond

indenter.

(D

When

using

ball

indenter.