Model EX-A* Type Shore A Normal
rubber
Model EX-D* Type Shore D Hard rubber and plastics
Model EX-C* Type Asker C Soft rubber and sponge
Asker is one of the leading manufacturers of hardness
testers in the world. Asker design and precision manufacturing offers you a
reliable, highly accurate durometer.
Super EX durometers feature portability, ease of
operation, non-destructive measurement and optional peak indicators. They
are heavy-duty with high repeatability.
Super EX models are available in Durometer Types: Shore A,
Shore D and Asker C.
Hardness is an essential characteristic of various rubber,
elastomers and plastic products. The first step in using a hardness tester
is to select the optimum type based upon the material hardness.
*Add 'P' to the model number to specify optional peak
indicator, for example EXP-A. |
 |
Durometer Selection
|
 |
Indentor Type
|
 |
|
Type Shore D |
Type Shore A |
Type Asker C |
Cone point type
Hard rubber and plastics
|
Flat point type
Normal rubber |
Hemispherical type Soft rubber and sponge |
Operation
As the durometer is pressed against the sample, the material
resistance force and indentor spring load balance. The depth of the indentor
is measured, which provides a measure of the material's hardness. Values are
based upon a 100 point scale (accuracy 1 point). However, as time elapses
the indicator will "creep" back so that a reading taken a few seconds after
the indentor makes contact with the sample will be less than the peak
reading. Asker durometers offer a peak indicator as an option to more
closely monitor the difference between peak and "creep".
| EX-A |
Shore A |
ASTM D-2240 |
1 kgf |
| EX-D |
Shore D |
ASTM D-2240 |
5 kgf |
| EX-C |
Asker C |
JIS K-7312 |
1 kgf |
|