DUROMETER TYPES

APPLICATIONS

INDENTOR SHAPE

MAIN SPRING

TYPE A
(ASTM D2240)

Soft rubber, plastics, and elastomers, printer's rolls.

Flat Cone Point

35° Included Angle

822 GM

1.81 LB.

TYPE D
(ASTM D2240)

Hard rubber and plastics such as thermo plastics, flooring and bowling balls.

Sharp Cone Point

30° Included Angle

4536 GM

10.0 LB.

TYPE B
(ASTM D2240)

Harder elastomers and plastics. Paper and fibrous materials, Use above 93 Duro A.

Sharp Cone Point

30° Included Angle

822 GM

1.81 LB

TYPE C
(ASTM D2240)

Medium hard elastomers and plastics. Also useful to avoid surface marks.

Flat Cone Point

35° Included Angle

4536 GM

10.0 LB

TYPE DO
(ASTM D2240)

Dense granular material, textile windings.

3/32" Spherical

4536 GM

10.0 LB

TYPE O
(ASTM D2240)

Very soft elastomers, textile windings, soft granular materials. Use below 20 Duro A.

3/32" Spherical

822 GM

1.81 LB

TYPE OO
(ASTM D2240)

Light foams, sponge rubber gels, animal tissue.

3/32" Spherical

113 GM

TYPE OOO
(ASTM D2240)

Ultra soft gels and sponge rubber.

1/2" Spherical

113 GM

TYPE M
(ASTM D2240)

Materials as thin as .050"

Sharp Cone Point

30° Included Angle