SHR‐187.5 Installation and Operation

1. Unpacking

1.1 Once received shipment, firstly confirm package is in good condition, if any damage, please tell us

and forwarder immediately

1.2 Take off two Iron straps by normal screwdriver

1.3 Take off screws in bottom side of Packing case (see below image, in red boxes, two sides of case)

1.4 Lift up plywood box, it should be higher than hardness tester.

1.5 Move out accessories boxes.

1.6 Take off anti dust cover.

1.7 Use forklift to rise the hardness tester with baseboard. (It is used to see clearly screws in the bottom

side of base board)

1.8 In the bottom side of base board, you can touch there is screw (see below image in red box), take off

it by wrench.

1.9 In the back side of hardness tester, there is also a screw, you can touch it (in red box below image),

take off it by wrench.

2. Installation

2.1 If you ned to test higher specimen, please make sure there is a hole on the table (diameter 90mm)

2.2 Below image is drawings of table (unit: mm)

2.3Move hardness tester to table, take off up cover screws by screwdriver

2.4 Loosen then move out cotton strip, white foam, rubber band and small red cloth. See below image:

2.5 Same take off back cover, like below image

2.6 Move out cotton strip and take off weights hook, used to install weights.

2.7 Install weights, see below image, there are total 6 weights, from up to low: 0,1,2,3,4,5.

W eight 0

The Hanging Rod

The fork-Shaped Frame

W eight 1

W eight 2

W eight 3

W eight 4

W eight 5

20

21

22

Test force, hardness scales and weights table, take note remark during testing.

Scale Force（N）Force

KnobWeights in force （Weights No.） Remark

HV 294.2 (30kg) 306.5 Weights 5Move out

weights 0

HB 306.5 (31.25kg) 306.5 Weights 5+0Put back

weight 0HRA 588.4 (60kg) 588.4 Weights 5+0+1

HB 612.9 (62.5kg) 612.9 Weights 5+0+2

HV,HB,HRB 980.7 (100kg) 980.7 Weights 5+0+2+3

HRC 1471 (150kg) 1471 Weights 5+0+1+2+4

HB 1839 (187.5kg) 1839 Weights 5+0+1+2+3+4

2.8 Install slipped table, make sure 2 red points aligning, see below image.

2.9 Install microscope

2.9.1Loosen screw by allen wrench, and screw on the tube, see below images

2.9.2 Now install microscope tube follow below images:

2.9.3 connect power cable follow below image

2.9.4 Install eyepiece

2.9.5 Install 5X objective for Vickers Testing (2.5X is for Brinell)

3 Vickers Testing Steps

3.1 After installed well objective and eyepiece, then install vickers indenter, and show standard hardness

block.

3.2 Standard hardness block value is 749HV30, means test force is 30KGF and get value at 749HV, so we

have to change force knob to 31.25, then move out weights 0.

3.3 Move out weights 0

3.4 Inspect objective is horizontal or not, lift up tale to near objective, it is convenient to observe

objective, if not horizontal, then adjust it follow below images

3.5 Loosen below screw, then slightly rotate microscope until it horizontal with table.

3.6 After confirm mentioned steps, like indenter, force, hardness block, then start testing. First aim long

index to 0 position, lift up table, once indenter contacts hardness block, then rotate long index 3 circles,

then press START.

3.7 After hear beee, then move test table to objective for observation and measuring, and prepare

hardness table for hardness checking.

3.8 Example: by means of 5X Objective, test force 294.2N(30Kg), measure out the Vickers hardness value

L=I×n L‐‐‐‐‐‐‐‐‐The diagonal length of indentation (mm)

n‐‐‐‐‐‐‐‐‐‐Number of grids of testing indention

I‐‐‐‐‐‐‐‐‐‐Min. graduation value of eyepiece drum wheel, when use 5X Objective

I=0.002mm

Therefore, L=0.002*(400 ‐ 221) =0.358, check vickers hardness table, the value is 434HV30.

3.9 Below we can see how to check hardness value from table.

4 Brinell Hardness Test Steps

Standard hardness block 195HBW2.5/187.5

Means use diameter is 2.5mm ball indenter , and force at 187.5kgf test brinell hardness at 195.

4.1 Put back weights 0, and change force knob to 187.5

4.2 Install diameter 2.5mm ball indenter.

4.3 Install objective 2.5X for brinell test

4.4 install light source for brinell testing

4.5 When long index contacts hardness block, then rotate 3 circle, then press START

4.6 Move test table to objective and prepare brinell hardness table

4.7 Compute Brinell Value

Example: by means of 2.5x Objective, ball indenterф2.5 mm, test force 1839N( 187.5 Kg), measure out

the Brinell hardness value

L=I×n

L‐‐‐‐‐‐‐‐‐The diameter of indentation (mm)

n‐‐‐‐‐‐‐‐‐Number of grids of testing indention

I‐‐‐‐‐‐‐‐‐‐Min. graduation value of eyepiece drum, when 2.5x Objective, I=0.004mm

Therefore, L=0.004 x (565 – 281.3) =1.1348, check brinell table, the value 175HBW2.5/187.5.

4.8 According to our hardness block, the test result from table is:

4.9 Hardness check steps:

Step 1, find column 2.5mm

Step 2, find 1.08 in the column of 2.5mm

Step 3, find test force 187.5kgf column

Step 4, find hardness value in the same row of 1.08 and force column at 187.5kgf

5, Install indenter protector

5.1 Take off indenter fix screw

5.2Move out back cover

5.3 install indenter protector（put well spring in protector）

5.4 When test HRC, use diamond indenter, and change force to (150/1471), find out HRC hardness block

5.5 Aim long index to 0 position, then Lift up test anvil until indenter contact test block, then rotate 3

circles of long index, then press START, until hear beee, then read hardness value in dial, black reading is

HRC, neglect first result.

6. Test HRB

6.1 Change force knob to 100kg, then install diameter 1.588mm steel ball indenter and find HRB block.

6.2 Aim long index to 0 position, then Lift up test anvil until indenter contact test block, then rotate 3

circles of long index, then press START, until hear beee, then read hardness value in dial, red reading is

HRB. Neglect first result.