COMPANY PRODUCT

1. XHR-150 Plastics Rockwell Hardness Tester is adopted a mechanism to load and unload the test force automatically, through rotating the Load-Change Hand Wheel to change test force; therefore the operation of this instrument is very simply; easy and prompt. Besides setting zero to the dial, there is no man-made operation error. The present hardness tester is with high sensitivity and stability, so as to suitable for usage in workshop and testing laboratory.
2. The method of plastics Rockwell hardness test is to press a ball indenter of a certain diameter into a specimen to be tested firstly with initial test force P0 and than together with main test force P1. After apply with total test force P (P0 + P1) and keep a stipulated duration time, than unload the main test force. The difference e between the press-in depth h1 during the initial test force keeping and the press-in depth h0 made by the initial test force applied means the permanent increment of indentation depth. Each press-in depth 0.002mm is as one hardness unit of plastics Rockwell. This test method is with the characteristic of high speed to test hardness and it is widely applied in inspecting the hardness for specimens.

Technical specifications
1. The Initial Test Force:  98.07N;  Tolerance: ± 2.0%
2. The Total Test Force:  588.4N, 980.7N, 1471N;  Tolerance: 2.0%
3. The Indenter Specifications:
3.1 The φ3.175mm ball indenter
3.2 The φ6.35mm ball indenter
3.3 The φ12.7mm ball indenter
4. The Power Source:     AC220V±5%, 50-60 HZ
5. Time-delayed control:   2-60 seconds, any key-in 
(The dwelling time of total test force for plastics Rockwell hardness test is 15 seconds)
6. The Max. Height of the Specimen Tested:   175 mm
7. The Distance from the Ball Indenter Center to the Instrument Body:   165mm.
8. The Overall Dimension (Length×Width ×Height):   525×215×700 (mm)
9. The Net Weight of the Tester:   78Kg (Approx)
10. The tolerances of displaying value and the repetition of the plastics Rockwell hardness tester 

Scales	Hardness Range of  Standard Hardness Blocks	Allowed Tolerance of  Displaying Value	Max. Repetition of  Displaying Value
HRE	70~94HRE	±2.0HRE	2.5HRE
HRL	100~120HRL	±1.2HRL	1.5HRL
HRM	85~110HRM	±1.5HRM	2.0HRM
HRR	114~125HRR	±1.2HRR	1.5HRR

 
11. The Scales, Indenters, Test Force Values and Usage Ranges of the Plastics Rockwell Hardness Test

Scales	Ball Indenters	Initial Test Force (N)	Total Test Force (N)	Usage Ranges
HRE	φ3.175mm (1/8 inch)	98.07	980.7	Hard plastics, hard rubbers, aluminum, tin,  copper, mild steel, synthetic resin and friction materials
HRL	φ6.35mm (1/4 inch)		588.4
HRM	φ6.35mm (1/4 inch)		980.7
HRR	φ12.7mm (1/2 inch)		588.4

 
Accessories (The Packing List)
 

No.	Description of Goods	Quantity
1	Ф 3.175 mm Ball Indenter	1 PC
2	Ф 6.35 mm Ball Indenter	1 PC
3	Ф 12.7 mm Ball Indenter	1 PC
4	Large Test Table	1 PC
5	Middle Test Table	1 PC
6	V-shaped Test Table	1 PC
	Standard Rockwell Hardness Block
7	HRE, HRL, HRM, HRR	TOTAL 4 PCS
8	Fuse 2A	2 PCS
9	Power Cable	1 PC
10	Weight A,B,C	TOTAL 3 PCS
11	Level	1 PC
12	Horizontal Regulating Screw	4 PCS
13	Screwdriver	1 PC
14	Spanner	1 PC
15	Nylon Anti-dust Bag	1 PC
16	The Product Quality Certificate	1 PC
17	Usage Instruction Manual	1 PC