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| Durometer Types & Specifications |
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|
| Technical Data |
| Type |
Model |
Main Spring |
Indenter Description |
Applications |
Type A
ASTM D2240 |
306L |
211 |
821 gf
1.81 lbs. |
Truncated Cone 35° Included Angle |
 |
Soft rubber, elastomers, leather, waxes |
| 408 |
501A |
| 201 |
511A |
Type D
ASTM D2240 |
307L |
212 |
4.5 kgf
10 lbs. |
Conical
30° Included Angle |
 |
Hard rubber, plastics |
| 409 |
502D |
| 202 |
512D |
Type B
ASTM D2240 |
306BL |
501B |
821gf
1.81 lbs. |
Concical
30° Included Angle |
 |
Rubber, elastomers |
| 408B |
511B |
Type C
ASTM D2240 |
307CL |
502C |
4.5 kgf
10 lbs. |
Truncated Cone
35° Included Angle |
 |
Medium-hard rubber, plastics |
| 409C |
512C |
Type DO
ASTM D2240 |
413 |
502DO |
4.5 kgf
10 lbs. |
3/32" Hemispherical |
 |
Dense textile windings, medium printing rollers |
| 512DO |
Type O
ASTM D2240 |
410 |
821 gf
1.81 lbs. |
3/32" Hemispherical |
 |
Soft printing rollers, textile windings |
Type OO
ASTM D2240 |
411 |
113 gf
4 oz. |
3/32" Hemispherical |
 |
Sponge rubber, soft rubber |
Type OOO
ASTM D2240 |
412 |
113 gf
4 oz. |
1/2" Hemispherical |
 |
Very soft materials e.g. open cell foams |
Type SL
PTC 1055 |
302SL |
142 gf
5 oz. |
1sq.cm - Circulator |
 |
Foam rubber |
| The following is a list of selected materials with the durometer type typically used to test its hardness |
Material |
Durometer ASTM Type |
|
Material |
Durometer ASTM Type |
|
Material |
Durometer ASTM Type |
|
Material |
Durometer ASTM Type |
| Abs |
D |
Acetate |
D |
Acrylic |
D |
Buna-N |
A |
| Butyl |
A |
Delrin |
D |
Epoxy (Potting Compound) |
D |
Ertalyte |
D |
| Felt |
A |
Garolite |
D |
Hypalon |
A |
Kevlar |
D |
| Leather |
A or D |
Neoprene |
A |
Nitrile |
A |
Nylon |
D |
| Polycarbonate (Lexan) |
D |
Polyester |
D |
Polyethylene |
D |
Polystrene |
D |
| Polyurethane |
A or D |
PVC (Polyvinyl-Chloride) |
A or D |
SBR (Styrene-Butadiene) |
A |
|
|
| Sorbothane |
OO |
Teflon |
A or D |
Silicone Rubber |
A |
|
|
| Wood |
D |
Vinyl |
A |
Wax |
A |
|
|
|
| Test Stands & Constant Load Weights |
|
| Technical Data For Use with PTC Durometers Only |
| Model |
Description |
| 320 |
 |
Precision Spring Loaded Test Stand for Type A, B, C, D, DO, & O |
| 441 |
 |
Portable 1 kg Constant Load Weight for Type A, B, & O |
| 470 |
 |
Precision Deadweight Test Stand for Models 302SL, 411, & 412 |
| 471 |
 |
Precision Deadweight Test Stand for Type A, B, & O |
| 473, 476 |
 |
Precision Deadweight Test Stand for Types A, B, C, D, DO, & DO |
| 475, 477 |
 |
Precision Deadweight Test Stand for Type C, D, & DO |
|
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