Main Features:
Model HBRV-187.5 Motorized Brinell Rockwell & Vickers Hardness Tester, a multi-functional hardness tester with Brinell, Rockwell &Vickers 3 kinds of testing methods and 7 steps testing force will meet the needs of many kinds of hardness measurement. The instrument is adopted automatic shifter to load, dwell and unload testing force, rotate the Load-Change Hand Wheel to change values of testing force, therefore the operation for this instrument is simple, easy and quickly. Beside set zero to the dial, there is no man made error for operation. The present instrument is with high sensitivity and stability, so as fit for usage in workshop and testing laboratory.
Rockwell Hardness
The Tolerance of Rockwell Hardness Display Value
Hardness Scale | Hardness Range of The Standard Testing Blocks | The Max. Tolerance of Hardness Display Value |
HRA | 20～≤75HRA | ±2HRA |
>75～≤88HRA | ±1.5HRA | |
HRB | 20～≤45HRB | ±4HRB |
>45～≤80HRB | ±3HRB | |
>80～≤100HRB | ±2HRB | |
HRC | 20～≤70HRC | ±1.5HRC |
Brinell Hardness
The repetition and tolerance of displayed Value for Brinell hardness tester
Hardness Value of Standard Testing Blocks (HBW) | Tolerance of Displayed Value (%) | Repetition of Displayed Value (%) |
≤125 | ±3 | ≤3 |
125＜HBW≤125 | ±2.5 | ≤2.5 |
＞225 | ±2 | ≤2 |
Vickers Hardness
The Tolerance and Repetition of Displayed Value for Vickers Hardness Tester
Tolerance of Displayed Value | Repetition of Displayed Value | |||
Hardness Scale | Displayed Value of Hardness Test Block | Tolerance of Displayed Value | Displayed Value of Hardness Test Block | Repetition of Displayed Value |
HV30 HV100 | ≤250HV | ±3% | ≤225HV | 6% |
300~1000HV | ±2% | ＞225HV | 4% | |
Standard Accessories:
No. | Description of Goods | Qty |
1 | Diamond Rockwell Indenter | 1 pc |
2 | Diamond Vickers Indenter | 1 pc |
3 | ф1.5875mm, ф2.5mm, ф5mm Ball Indenter | Total 3 pcs |
4 | Large Testing Table | 1 pc |
5 | Medium Testing Table | 1 pc |
6 | “V” Shaped Testing Table | 1 pc |
7 | HRC ( High, Lower) | Each 1 pc, Total 2 pcs |
8 | HRB | 1 pc |
9 | Standard Vickers Hardness Block | 1 pc |
10 | Standard Brinell Hardness Block | 1 pc |
11 | Weight 0, 1, 2, 3, 4 | Total 5 pcs |
12 | Power Cable | 1 pc |
13 | Fuse 0.5A (5 X 20) | 2 pcs |
14 | Plastic Anti-dust Bag | 1 pc |
15 | Check List of Brinell Hardness | 1 pc |
16 | Instruction Manual | 1 pc |
17 | Quality Certificate | 1 pc |
18 | Kit of Microscope (Including below) | 1 set |
Seat of Microscope | 1 pc | |
Micro Eyepiece | 1 pc | |
2.5X Objective | 1 pc | |
5X Objective | 1 pc | |
Slipped Testing Table | 1 pc | |
Outside Light | 1 pc | |
Inside Light | 1 pc |
Standardized Hardness Block 
Readout Microscope 
Indenters for All Kinds of Hardness Testers 
Model HUS-250 Universal Hardness Tester 