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.

Questions regarding specific testing requirements requiring detailed technical information, are freely answered as a service to our customers.

The text link in the ‘Model’ column of the table below will display the current information for the respective durometer.

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

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PTC® Durometer Application Guide Fill 118 Copy 1 Created with Sketch.
TypeApplicationModelDescriptionMain Spring (gf)Indentor Geometry
ARubber: Soft vulcanized, natural, nitrile | Elastomeric Materials: neoprene, thiokol, flexible polyacrylic esters | Other: Wax, felt, leather, etc.201 211 306L 408 501A 511AAnalog Pencil | Digital Pencil | Classic Style | Ergo Style | Analog e2000 | Digital e2000821 821 821 821 821 821

35º Cut Cone
JIS ARubber: Soft vulcanized, natural, nitrile | Elastomeric Materials: neoprene, thiokol, flexible polyacrylic esters | Other: Wax, felt, leather, etc.JIS AClassic Style 855

35º Cut Cone
BRubber: Moderately Hard (typewriter rollers, platens)201B 211B 306BL 408B 501B 511BAnalog Pencil | Digital Pencil | Classic Style | Ergo Style | Analog e2000 | Digital e2000 821 821 821 821 821 821

30º Cone
CRubber: Medium Hard | Plastics: Medium Hard202C 212C 307CL 409 502C 512CAnalog Pencil | Digital Pencil | Classic Style | Ergo Style | Analog e2000 | Digital e20004536 4536 4536 4536 4536 4536

35º Cut Cone
JIS CRubber: Medium Hard | Plastics: Medium Hard JIS CClassic Style 4500

35º Cut Cone
DRubber: Hard | Plastics: Harder grades; Rigid Thermoplastics202 212 307L 409 502D 512D Analog Pencil | Digital Pencil | Classic Style | Ergo Style | Analog e2000 | Digital e2000 4536 4536 4536 4536 4536 4536

30º Cone
DOTextile Windings: Very Dense (slasher beams, etc.)202DO 212DO 413 502DO 512DOAnalog Pencil | Digital Pencil | Ergo Style | Analog e2000 | Digital e20004536 4536 4536 4536 4536 4536

3/32” Sphere
ORubber: Soft | Textile Windings: Medium Density201O 211O 410 501O 511OAnalog Pencil | Digital Pencil | Ergo Style | Analog e2000 | Digital e2000821 821 821 821 821

3/32” Sphere
OORubber: Sponge | Textile Windings: Low Density203 411Analog Pencil | Ergo Style113 113

3/32” Sphere
OOOPlastic: Foams | Rubber: Sponge412Classic Style 113

1/4” Sphere
SLPlastic: Foams | Rubber: Sponge302SLClassic Style 142

11.3 mm Ø
CFPlastic: Foams | Rubber: Sponge414CFClassic Style 9072

1/4” Sphere
Asker CPlastic: Foams | Rubber: SpongeAsker CClassic Style855

5.08 mm Sphere

Index Terms: Fill 118 Copy 1 Created with Sketch.

PTC Durometer, PTC 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, ISO 8517, ISO 7267, ISO 21509, ISO 18517, JIS K6253, JIS K6251, JIS K6252, JIS K 6253, JIS K6254, JIS K6255, JIS K6256, JIS K6257, JIS K6258, JIS K6259, JIS K6260, JIS K7215, DIN 53505, DIN 53 505, CNS, K6898, BS 903, BS 2782, BS ISO 21509, BS EN ISO 868, GB/T 10807, Asker, Asker C, SRIS 0101, MIL-STD-45622A, MIL-I-45208A, MIL-STD-120, 83.060, 83.080, hysteresis, creep, Young’s Modulus.