ASKER Durometer Type E

The ASKER Durometer Type E for soft rubber (low hardness), as specified by JIS K 6253-3 and ISO 48-4.
The application is the same as the standard ASKER Durometer Type C

Widely used for measuring soft rubber, sponges, and other foam elastomers, as well as rolled-threads, -films and textile windings (yarn packages).

Features

Indentor

Height: 2.50mm Shape: Spherical

Pressure foot

The Pressure foot in contact with the specimen is 44mm in width and 18mm in depth, wide enough to ensure accurate measurement. The Longer Pressure Foot Type (EL type)is applicable for measurement of narrow or concave specimens.

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 6253-3 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.

Specification

Standards

JIS K 6253-3
ISO 48-4

Indication range

0 point - 100 point (262 degree dial scale)

Minimum indication

1 point (Accuracy : ±1 point)

Indentor Design (mm)

Height: 2.50 5.00 Dia. Spherical

Spring Forces [mN(g)]

0 point:: 550(56)

100 point:: 8050(821)

Central hole of diameter of Pressure foot

Φ5.5

Pressure foot Dimension (mm)

44×18(Rectangular)

Outer Dimension (mm)

Approx. Width 57×Depth 30×Height 76

Weight (g)

200

Application

soft rubber, urethane foam, rubber roller

Outer Dimension (mm)

A custom designed pressure foot durometer is available according to specimen conditions.

Option

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.

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.

Load Tester for Hardness Tester

Tester to check load properties of the spring on a durometer
Inspection is conducted at 25, 50, and 75 points respectively.