Product Description

This selection guide is designed as a general overview of the many durometer styles, types, spring force ranges, and indentor configurations.

It may assist in choosing the proper durometer for a particular application, however, it is not to be considered a definitive technical document.

The text link in the ‘Model’ column of the table below will display the current information for the respective durometer. The color of Rex® durometers indicates their respective type (scales), Type O for example, indicates ASTM D—2240 Type O.

It is also highly recommended that, whenever possible, an operating stand be employed in performing durometer hardness tests. Please visit the Rex® Operating Stand webpage to select a suitable Operating Stand for your application.

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Application Guide Fill 118 Copy 1 Created with Sketch.
ASTM TypeApplication ModelDescription Spring (gf) Indentor Geometry
ARubber: Soft vulcanized, natural, nitrile | Elastomeric Materials: neoprene, thiokol, flexible polyacrylic esters | Other: Wax, felt, leather, etc.DD—3 | MS—1 | H1000 | 1500 | 1600 | 1700 | 2000 | 2100Digital | Multi—Scale | Mini—Dial | Vernier Scale | Standard Dial | Max Hand | Max Hand | Tires Only822 35º Truncated Cone
BRubber: Moderately Hard (typewriter rollers, platens)DD—3 | MS—1 | H1000 | 1500 | 1600 | 1700 | 2000Digital | Multi—Scale | Mini—Dial | Vernier Scale | Standard Dial | Max Hand | Max Hand453630º Cone
CRubber: Medium Hard | Plastics: Medium HardDD—3 | MS—1 | H1000 | 1500 | 1600 | 1700 | 2000Digital | Multi—Scale | Mini—Dial | Vernier Scale | Standard Dial | Max Hand | Max Hand4536 35º Truncated Cone
DRubber: Hard | Plastics: Harder grades; Rigid ThermoplasticsDD—3 | MS—1 | H1000 | 1500 | 1600 | 1700 | 2000Digital | Multi—Scale | Mini—Dial | Vernier Scale | Standard Dial | Max Hand | Max Hand4536 30º Cone
DOTextile Windings: Very Dense (slasher beams, etc.)DD—3 | MS—1 | H1000 | 1500 | 1600 | 1700 | 2000Digital | Multi—Scale | Mini—Dial | Vernier Scale | Standard Dial | Max Hand | Max Hand4536 3/32” Sphere
ORubber: Soft | Textile Windings: Medium DensityDD—3 | MS—1 | H1000 | 1500 | 1600 | 1700 | 2000Digital | Multi—Scale | Mini—Dial | Vernier Scale | Standard Dial | Max Hand | Max Hand8223/32” Sphere
OORubber: Sponge | Textile Windings: Low DensityDD—3 | MS—1 | 1600 Digital | Multi—Scale | Standard Dial113 3/32” Sphere
OOORubber: Sponge | Plastic: FoamsDD—3 | 1600Digital | Standard Dial113 1/2” Sphere
MRubber: Soft vulcanized, natural, nitrile | Elastomeric Materials: neoprene, thiokol, flexible polyacrylic esters | Other: Small irregular shapes 1.25 mm+ thick DD—3 | 1600Digital | Standard Dial7830º Cone

Index Terms: Fill 118 Copy 1 Created with Sketch.

Rex Durometer, Rex Durometers, Shore hardness, pocket durometer, Shore scale, hardness, rubber hardness, plastic, plastic hardness, indentation hardness, ebonite, ebonite hardness, rubber hardness testing, rubber testing, hardness testing, durometer hardness, testing, ASTM D2240, D2240, ASTM D1957, ISO 868, ISO 7619, JIS K6253, JIS K6251, JIS K6252, JIS K 6253, JIS K6254, JIS K6255, JIS K6256, JIS K6257, JIS K6258, JIS K6259, JIS K6260, DIN 53505, DIN 53 505, CNS, K6898, BS 903, BS 2782, BS ISO 21509, BS EN ISO 868, GB/T 10807, Asker, Asker C, SRIS0101, MIL-STD-45622A, MIL-I-45208A, MIL-STD-120, 83.060, 83.080.01, hysteresis, creep, Young’s Modulus.