| ASKER Durometer Type AL |
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The Type A Durometer for general rubber (Normal hardness )
The mainstream product used world-wide for measuring various kinds of rubbers, and specified in the standards of JIS K 6253, ASTM D 2240, ISO 7619, DIN53505, etc. |
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| Features |
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| Indentor |
 | Height: 2.50mm Shape: Flat Cone Point |
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| Hardness Tester Selection Chart |  | | Our product line consists of various types of durometers applicable to specific materials
as indicated in the chart above.
Type A Durometer (ASKER A type), conforming to JIS K 6235 is the most popular type of durometer for measuring rubber hardness.
However, verification is recommended because a significant difference is estimated to be the largest when a durometer indicates measurement values from 10 to 90 points.
For hard specimens for which Type A Durometer readings indicate more than 90 points, measurements should be undertaken using the Type D Durometer (ASKER D type). However, for soft specimens with measurements of less than 20 points, the ASKER C type or Type E Durometer (ASKER E type) should be used. The most important consideration in using durometers is to select the correct type for purposes of measurement according to the specimen.
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| Specification |
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| | Standards | | JIS K 6253
JIS K 7215
ASTM D 2240
ISO 7619
ISO 868
DIN 53505 |
| | | Indication range | | 0 point - 100 point (262 degree dial scale) |
| | | Minimum indication | | 1 point (Accuracy : ±1 point) |
| | | Indentor Design (mm) | | Height: 2.50 35°Angle Flat Cone Point 0.79 Dia. |
| | | Spring Forces [mN(g)] | | |
| | | Central hole of diameter of Pressure foot | | Φ3 |
| | Pressure foot
Dimension (mm) | | Φ12 Longer foot type Length: 18 |
| | | Outer Dimension (mm) | | Approx. Width 57×Depth 30×Height 94 |
| | | Weight (g) | | 200 |
| | | Application | | general rubber, soft plastic |
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| Outer Dimension (mm) |
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|  | | A custom designed pressure foot durometer is available according to specimen conditions. |
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| Option |
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|  | | | Two-pointer type (max-hand and active hand) of Rubber Hardness Tester
The stationary set hand (max-hand) makes the maximum value easier to read and allows the creep characteristics of a specimen.
Accurate measurement is made possible for specimens* for which stress relaxation occurs over time or for specimens for which it is difficult to take readings from the front.
*Materials for which the reading decreases immediately after the indentor has been pressed against the surface. |
| |  | | | Constant Loader for Durometer
| · | Constant loarder assures uniform test pressure eliminating false readings due to differences between operators in measuring by hand. | | · | High accuracy and repeatability of the hardness readings are assured by the flexible joint function. |
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| |  | | | Indentor Extension Tester
| · | The gauge to check the indentor height on a durometer and the reading indicator mechanism. | | · | Inspection is conducted at 2, 50, and 100 points respectively. |
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| |  | | | Load Tester for Hardness Tester
| · | Tester to check load properties of the spring on a durometer | | · | Inspection is conducted at 2, 50, and 75 points respectively |
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