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Desktop Manual Rockwell Hardness Tester HR-150A

Short Description:

Desktop Manual Rockwell Hardness Tester HR-150A is mainly used to determine the Rockwell hardness of ferrous metals, non-ferrous metals and non-metallic materials. The applying speed of test pressure can be adjusted by a buffering device, and the change of pressure is obtained by turning of a pressure selecting hand wheel. Operation of the tester is quite easy, while the performance is stable and thus the tester can be used in a wide range. Specification Model HV-30T Initial Pressure 98...


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Desktop Manual Rockwell Hardness Tester HR-150A is mainly used to determine the Rockwell hardness of ferrous metals, non-ferrous metals and non-metallic materials.

The applying speed of test pressure can be adjusted by a buffering device, and the change of pressure is obtained by turning of a pressure selecting hand wheel. Operation of the tester is quite easy, while the performance is stable and thus the tester can be used in a wide range.

Specification

Model HV-30T
Initial Pressure 98N,
Total Test force 588N, 980N, 1471N,
Specification of Indenter Conical diamond Rockwell indenter, 1.5875 mm ball indenter
Max height of speciments(mm) 170mm
Distance from Indenter’s center to OuterWall 165mm
Machine Size(DXWXH)(mm) 510×230×750
Weight(kg) 85
HRA 20~88
HRB 20~100
HRC 20~70

When measuring, please select penetrator and total test force according to the following table.

Scale

Penetrator

Total Test Force N(kgf)

Symbols Measuring Range

B

Φ1.5888mm steel ball

980.7(100)

HRB  20-100

C

120° diamond

1471(150)

HRC  20-70

A

120° diamond

588.4(60)

HRA  20-88

Scale  A:
It is used for measuring the metals, the hardness of which is over HRC 70(such as tungsten carbide alloy, etc.) and also for measuring hard sheet materials and surface quenched materials.
Scale  C: It is used for measuring the hardness of heat treated steel parts.
Scale  B: It is used for measuring softer or middle hard metals and unquenched steel parts.

Packing List
1 Rockwell Hardness Tester      1Set
2 Large flat anvil         1
3 Small flat anvil             1
4 V-notch anvil         1
5 Diamond pentrator     1
6 Steel ball penetrator Φ1.588mm    1
7 Steel ball Φ1.588mm                5    (spares)
8 Rockwell standard block 80-88HRA   1
9 Rockwell standard block 85-95HRB   1
10 Rockwell standard block 60-70HRC   1
11 Rockwell standard block 35-55HRC   1
12 Rockwell standard block 20-30HRC   1
13 Large screw driver   1
14 Small screw driver   1
15 Auxiliary box     1
16 Dust shield     1
17 Operating instruction   1
18 Certificate   1
19 Packing list   1

MAINTENANCE OF THE HARDNESS TESTER
1.If the tester is not in use for a long time , it should be covered with a dustproof cover.
2.Fill periodically some machine oil on the contacting surface of the screw (26) and the handwheel (27).
3.Before use of the tester, make clean the top surface of the screw (26) and the up end surface of the anvil.
4.If the hardness value indicated is found too big in error:
1) Remove the anvil and check whether the its surface contacted with the screw is clean
2) Check whether the protective jacket supports up the anvil.
3) Check whether the penetrator is damaged.
5.When applying main test force, the indicator pointer rotates too fast at beginning and then slowly , it means that the machine oil in the buffer is too less. In this case, lift up the felt gasket on up end of the buffer (7), fill in slowly clean machine oil and meanwhile push and pull many times the handles (15)(16) to get the piston up and down time and again, and exhaust the air completely from the buffer till the piston drops to the bottom and oil overflows from it.
6.Use the standard test block supplied with the tester to check periodically the accuracy of the hardness tester.
1) Clean the anvil and the standard block and carry on test with the working surface of the block . It is not allowed to test with its supporting surface.
2) If the error of the indicated value is rather big, besides checking according to the item 4 of this chapter , check whether the supporting surface of the standard test block is with burrs. If in this case, polish it with oil stone.
3) If testing on a standard block in different positions, the block should be pulled on the surface of the anvil and not taken off from the anvil.

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