TERIL rmrests - spirin - utomobile Tire - owling all - omposite Foam - ork - ushions - ashboards - oor Panels - Epoxy - Felt - Fiberboard - Fiberglass - Fibrous aterials - Flexible Polyacrylics - Foam - Fruit - Gasket - Gym Shoe - Headrests - Lead - Leather - Natural Rubber - Nitriles - -Rings - Paper Products - Plastic - Plastic Specimens - Plastics, Extremely Soft - Plastics, Hard - Plastics, edium Hard - Plastics, Very Soft - Pool Ques - PV - Roller, Printing - URETER RR sker,
Roller-skate Wheels - Rubber - Rubber, Extremely Soft - Rubber, Hard - Rubber, edium Hard - Rubber, oderately Hard - Rubber, Soft - Rubber, Thin - Seal - Silicone Sealants - Skateboard Wheels - Soft Vulcanized Rubber - Sponge - Sugarcane - Textile Windings, ense - Textile Windings, Low ensity - Textile Windings, edium ense - Thermoplastic Elastomers - Thermoplastics - Thermoplastics, Extremely Soft - Thermoplastics, Rigid - Thermoplastics, Soft - Thermosets - Tissue, nimal - Vehicle Seats - Wax - Wood -,, 00,,,,, 00
urometer Technical Information easuring Suggestions The principle used to measure hardness is based on measuring the resistance force of the penetration of a pin into the test material under a known spring load. The amount of penetration (max. 2.5 mm) is converted to hardness reading on a scale with 100 units. 1. Whenever possible, a urometer measurement should be taken at least 12 mm (approx. 0.500") in from the edge of a sample, as the hardness characteristic of any sample tends to change at the edges. 2. Whenever possible, the thickness of a sample should exceed 6 mm (approx. 0.250"). If the sample is thinner then this, then the sample can be backed with a sample of the same material to increase the thickness. 3. Test oupons or test blocks (rubber or plastic) should not be used for calibration verification. s all samples are subject to characteristic changes over time along with temperature and lighting conditions, the rated Shore value when supplied as new can and will vary with age. Proper calibration verification requires independent confirmation of the internal spring forces along with the verification of the pin displacement vs. the indicated value on the scale. Principle of peration Reference Guide & Scale omparison
Type pplication Indentor Spring Force Soft rubber, plastics and elastomers. Flat cone point, 35º Harder elastomers and plastics. Paper and fibrous materials, Use above 93 scale. edium hard elastomers and plastics. lso useful to avoid surface marks. Flat cone point, 35º Hard rubber and plastics such as thermo plastics, flooring and bowling balls. ense granular material and textile windings. Very soft elastomers, textile windings and soft granular materials. Use below 20 scale. Light foams, sponge rubber gels and animal tissue. 113 g 0.25 lb Ultra soft gels and sponge rubber. aterials as thin as.050" 1/2" 113 g 0.25 lb - Type omparison Table This chart is for comparison purposes only. It cannot be used for conversion reference. urometer Spring Force alibration Indicated Value Type, (Newtons) Type (Newtons) 0 0.55 10 1.3 4.445 20 2.05 8.89 30 2.8 13.335 40 3.55 17.78 50 4.3 22.225 60 5.05 26.67 70 5.8 31.115 80 6.55 35.56 90 7.33 40.005
100 8.05 44.45 N/urometer Unit 0.075 0.4445 al Tolerance ±0.075 ±0.4445