space-certified

Reference Guide

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

A 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

D 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

D 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

C 4536 GM

10.0 LB

TYPE DO
(ASTM D2240)
Dense granular material, textile windings. 3/32" Spherical O 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 O 822 GM

1.81 LB

TYPE OO
(ASTM D2240)
Light foams, sponge rubber gels, animal tissue. 3/32" Spherical O
113 GM
TYPE OOO
(ASTM D2240)
Ultra soft gels and sponge rubber. 1/2" Spherical Ooo
113 GM
TYPE M
(ASTM D2240)
Materials as thin as .050" Sharp Cone Point

30° Included Angle

D