Introduction

Similar to the Webster hardness tester, Barcol type is a kind of hardness testing instrument which confirms the material hardness through the depth caused by pressing the testing machine into the surface of the sample under the effect of a spring. The deeper the Barcol type pressed, the bigger the reading is, and then the harder material is. However, the Barcol type has 100 scales and its sensitivity is much higher than the Webster type with only 20 scales. Our company can provide domestic Barcol hardness testers in stock which includes 934-1, 935-1, 936-1 and imported Buckle type. The 934-1 is used to test the hardness of aluminum and aluminum alloy and it is particularly suitable for replacing Webster hardness testing instrument which cannot test the thick-walled aluminum extrusions. In addition, the improved 935-1, 936-1 Buckle type can be used to test soft metal, soft plastic, leather, rubber and wood, etc. Such Barcol hardness tester is small, light and easy to carry and operate. It doesn't need a support when it is in operation. Users can operate it with one hand from one way at any occasions. Barcol hardness tester has a broad testing range, the material with more than 0.8mm thickness can be measured by it. Its effective measuring range is from 25 to 150HBW and the testing results can be converted into the hardness values of Merriam-Webster, Brinell, Rockwell, Victoria so that the result is easy to be proofed. Our company has repaired hundreds of 934-1 instruments after years of explorations and researches, so our company masters a mature production technology. We can provide customers with professional guidance and maintenance services, welcome to consult and purchase. 

Features of Barcol Impressor
1. Barcol Impressor is a portable indentation hardness tester. 
2. Single hand operation, operating experience required can test any operating experience whitch is reachable in any site 
3. Wide valid testing range equivalent to Brinell hardness 25-150HBW, used to test the hardness of all kinds of aluminum from very soft aluminum to very hard alloys. 
4. Barcol Impressor has a wide range of application. Model 934-1 can be used to test aluminum and aluminum alloys, copper and copper alloys, glass fiber reinforced plastics, rigid plastics, etc. The improved type can be used to test lead, tin and other soft metal, and flexible plastics, rubber, felt, leather, and so on.
5. With 100 scales, our Barcol Impressor is of higher sensitivity than commonly used Webster hardness testers in aluminum alloy industry. 
6. It could finish the testing work on one side of the workpiece, without trouble of moving or supporting the workpiece. Due to this feature, the hardness tester can be used to test extra large, extra thick workpieces and assembly parts.
7. By use of the conversion table, the test results can be easily converted to HB, HR, HV and HW. 
8. It meets the requirement of ASTM B648-2000 standard.

Main Technical Parameters

 Indenter:              26°panhead cone, head face diameter
                             0.176mm
 Testing Range:      0~100HBa,equivalent to 25~150HBW
 Resolution:            0.5HBa
 Indication error:     hardness range 42~52HBa, ±2HBa
                             hardness range 84~88HBa ±1HBa
 Repeatability error: hardness range 42~52HBa, ±2HBa
                             hardness range 84~88HBa ±1HBa
 Net weight:          0.5kg

Application

Barcol Impressor is mainly applied to test aluminum and aluminum alloys. Webster is used to test aluminum alloy extrusions, sheet and tubings. Barcol Impressor is suitable to test pure aluminum, soft aluminum alloys, super thick aluminum alloys, aluminum alloys bars and assembled aluminum alloys parts (e.g. al-alloy door &window, scaling ladder etc.)
Relevant Standard: ASTM B648 (Test Method for Indentation Hardness of Aluminum Alloys by Means of a Barcol Impressor)

Barcol Impressor is also used to test fiber reinforced plastics and rigid plastics etc. 
Relevant Standard: ASTM D2583-07(Test Method for Indentation Hardness of Rigid Plastics by Means of a Barcol Impressor)

The improved models of Barcol Impressor are available to test softer plastics, very soft metals, rubber and leather etc.

Standard Package

 Tester
 Spare indenters (2 pcs)
 High value Standard hardness block (1 pc)
 Low value Standard hardness block (1 pc)
 Calibration wrench
 Supporting foot 
 Carrying case