When an operator hold spring type durometer for measuring the hardness of rubber specimen by hand, the load applied from the durometer to the test specimen is not constant due to different pressure speed and force between operators. Hardness conversion chart provides values for brinell. Take the durometer reading using the specific parameters for the scale youll be using. To the design engineer, it is a measure of flow stress. Wayne had access to a rockwell tester so making cupons of the right hardness was easy. Common applications are for quality control purposes and include testing the hardness of skateboard wheels, car tyres, shoe soles, gummy bears and cheeses to name just a few. Hardness testing, zeroing hardness testing, zeroing hardness testing, zeroing display. Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials. Uncertainty due to the resolution effect of the shore hardness tester, when considering ures equals one fifth of the durometer scale value. Please sign in to your account to see your pricing, which may be different from the price displayed. Hardness tester shore a durometer hardness tester shore c.
Fowler full warranty 527600000 hardness tester file set. Precise measuring of hardness, diameter, thickness and weight. Therefore the durometer must be pressed to the test sample at the constant speed and force as far as possible. Hardness conversion chart provides values for brinell, rockwell a, rockwell b, rockwell c, rockwell d, rockwell e, rockwell f, rockwell superficial 15n, rockwell superficial 30n, rockwell superficial 45n, rockwell superficial 30t, vickers 6, shore, and tensile strength psi hardness. Asker hand held durometers measure hardness from sponge to hard rubber and plastics, covering the range of shore d, shore a, asker c and asker f hardness scales. Those specimens which have a durometer hardness range other than speci. This depth is dependent on the hardness of the material, its viscoelastic properties, the shape of the presser foot, and the duration of the test. Lab suppliesmaterial testing equipmenthardness testers. The fowler 527600000 fowlers hardness tester file set is an inexpensive, easytouse method for determining material hardness by sliding the file across the objects surface. You may purchase the astm standard from the american society for testing and materials, 100 barr harbor drive, west conshohocken, pa 194282959, phone 6108329585, web. As the hardness tester is pressed against the sample, the material resistance force and indentor spring load balance.
Rex gauge a leader in durometer hardness gauges for over. To the lubrication engineer, it means resistance to wear. Shore d hardness tester can also carry out lab tests. This product is to be used as hardness measuring instrument for. Uncertainty evaluation of shore hardness testers pdf free. There are several scales of durometer hardness, used for materials with different. Hardness testers in this category utilize more innovative and portable devices to measure the effective hardness of a variety of materials using a variety of hardness scales. We are proud to be the manufacturer of the only space foundation certified durometer. Introduction to hardness testing asm international. Set includes six files and a chart to convert to vickers scale.
Introduction to hardness testing hardness has a variety of meanings. After finishing operations please make sure that the gauge is clean and put it back. At this time, kern does not calibrate shore hardness testing instru ments. If a result using shore d durometer is below 20, one should use the shore a durometer. Rex gauge a leader in durometer hardness gauges for over 70.
The rockwell value is printed on each handle and the files range from hrc 40 through hrc 65. Din 53505 astm d 2240 iso 868 and iso 7619 shore durometers for testing hardness of sulfurized rubber and plastics. For the most consistent results rock the durometer from angled back past straight up. Fowlers hardness tester file set is an inexpensive, easytouse method for determining material hardness by sliding the file across the objects surface. Durometer shore c durometer shore d durometer contact force.
Ge inspection technologies ultrasonics krautkramer mic 10. Specific criteria for calibration laboratories in mechanical. The shore durometer is a device for measuring the hardness of a material, typically of polymers, elastomers, and rubbers. Practical hardness testing made simple 4 it is commonly believed that, for practical purposes, in a definitely limited range, there is an approximate correspondence between hardness data and a range of tensile strength results. One of the most important parameters in any hardness test is the means by which load application and load control are performed. Hardness testing file sets 7 items returned list catalog refine results 7 items returned 5. If a file can scratch your material, then your material is softer than the file. Asker durometers offer optional peak indicators to more closely monitor the difference between the peak reading. The operation handle evenly applies the force to the sample. Durometers measure the relative hardness of the rubber on your racing tires. One type of hardness tester measures in a durometer, which is a unit of measurement defined as a. If a file cannot scratch your material, then your material is harder than the file. The checkline ad100 durometer tester is the genesis of years of experience offering high quality durometers to discriminating users. Traditional hardness testers employ deadweight systems, a reliable and proven method, to apply and hold the test force.
You must apply equal pressure to the durometer each time you take a reading. The dsd series digital durometers are designed for easy use to test most soft rubbers and elastomers, through to hard plastics and resins. Hardness testers in this category utilize traditional benchtop methods measure the effective hardness of a. The positector shd shore hardness durometer measures the shore indentation hardness of nonmetallic materials such as polymers, elastomers and rubbers. Lab suppliesmaterial testing equipment hardness testers. The depth of the indentor is measured, which provides a measure of the materials hardness. When choosing a hardness tester a number of factors are important to consider. Pleiger plastics company manufactures polyurethanes in five point durometer increments to provide each specific application the best choice of hardness. Lower numbers indicate less resistance and softer materials. If a result using the the shore a durometer exceeds 90, one should use the shore d durometer. They can be taken to outoffactory sites to test for hardness on large structures or segments of machinery. Dht20 digital hardness tester for field or laboratory.
Durometer rubber, plastic hardness tester gs720n type d durometer hard rubber gs719n type a durometer general rubber gs721n type e durometer soft rubber dimension unit. Conveniently packaged in a leatherlike case with a velcro lined flap, the files are approximately. Featuring an 18mm footer that offers high stability and conforms to all international standards, the ad100 is the ideal durometer for a wide range of shore hardness measuring applications. Irhd microrubber hardness tester is designed for the purpose of measuring hardness of o ring, small rubber parts and thin rubber sheet. Digital shore durometer dsd series starr instruments. His point was a person could feel the file on a hardened blade then, by elimination, find the same, or nearly so feel on the test cupon. They are easytouse, portable and very accurate with a high degree of repeatability. To run your best you must keep track of all your tires hardnesses. Flexbar introduces a unique new set of six specially shaped files, each with a nonslip grip, colorcoded handle. If a result using shore a durometer is below 10 it is incorrect. Hardness testers material testing equipment grainger. Hardness testing for rubber, plastics and more hildebrandgmbh. Durometer will also play a significant role in abrasion resistance, compression set, tensile and tear strength, resiliency and chemical resistance of urethanes.
Apply the springloaded foot of the durometer to the material with sufficient force to make the spring begin to compress. Six color coded files indicate hardness from 40 to 65 hrc. High reproducibility data without individual difference can be obtained by measuring hardness with durometer mounted to automatic measuring stand. F1957 test method for composite foam hardness durometer hardness 2. Nabl 12215 specific criteria for calibration laboratories in mechanical discipline durometer rubber hardness tester issue no. Newage testing instruments recommends that you obtain a copy of the appropriate standard for your application and that you read and understand the standard prior to testing. To the metals industry, it may be thought of as resistance to permanent deformation. Newage hardness files are yamamoto types, used to measure the resistance of solid surfaces to permanent deformation by a hardness file.
One of the most popular hardness testing methods, brinell hardness number is obtained using a perfectly spherical hardened steel ball of 10 mm pressed against the test surface using a static force of 3000 kg 29. When your profession or industry relies on accurate readings of hardness levels, make msc your first choice. Easy to use, portable rockwell hardness testing system for use in all metalworking facilities. Durometer hardness system provides hardness readings on elastomers and plastics with a specimen thicker than 6 mm according to irhd and durometer hardness.
Pencil hardness and shore d hardness were obtained from the pencil hardness tester modal no. Reads from 0100 points shore a scale comes with red case. The sg5000 durometer as pictured was taken aboard discovery during the space shuttle mission sts114 on july 26th, 2005. While this assumption is generally correct if taken with due caution, one must remember that no indication regarding. For example large surfacehardened gears, large printing cylinders or weld zones of heat affected pipe lines which cannot be moved to a stationary tester. Uncertainty evaluation of shore hardness testers pdf. Type e 2 durometer with around half of sponge spring load figure of type e, and type fo to measure hardness of polystyrene sponge for the level of sponge washing dishes are available. One type of hardness tester measures in a durometer, which is a unit of measurement defined as a materials resistance to permanent indentation. Rockwell testing aids suppliers of hardness testers, dynamic hardness testers, poldi hardness testers, impact hardness testers, portable hardness testers, brinell hardness testers, rockwell hardness testers, optical brinell hardness testers, computerized brinell hardness testers, portable hardness testers and dynamic hardness testers, india. The digital complete oring hardness kit is the most convenient and accurate way to perform repeatable hardness durometer testing on thin materials as thin as. Tableofcontents listoffigures ix listoftables xii 1. Hardness testers in this category utilize more innovative and.
Please read this manual thoroughly before use for proper operation. Time5410 shore d hardness tester durometer pdf catalogs. Hardness testers in this category utilize traditional benchtop methods to measure the effective hardness of a variety of materials using a variety of hardness scales. Durometer, like many other hardness tests, measures the depth of an indentation in the material created by a given force on a standardized presser foot. In order to get the most accurate results you need to follow a standard routine. To determine the hardness of plastics, in 1915 albert shore developed an extremely simple. L a practical manual of rubber hardness testing, maclaren.
Defelsko also manufactures the positector bhi barcol hardness impressor which is ideal for measuring the hardness of soft metals aluminum, aluminum alloys, copper, brass, etc. Hardness testers, dynamic hardness testers, poldi hardness. The dht20 is an advanced portable hardness tester, characterized by its high accuracy, wide measuring range and simplicity of operation. To the metallurgist, it means resistance to penetration. It is an economical way to determine the hardness of steel on the rockwell cscale. Testing rubber, polymer and a wide variety of other substances often require hardness testers and durometers. Its designed to measure the hardness of ordinary metals and is widely used in quality and test and measurement laboratories in industries such as petroleum, chemical processing, machinery, heat treating, and electric power. Shore a tester 2 shore hardness testing shore durometers ths200 features digital durometer for shore a hardness testing pocket size model with integrated probe testing soft rubber, plastic and other soft materials according to din 53505, astm d 2240, iso 7619, jis k7215 rs232 data output operating stand optional. As an all embracing manufacturer of nonrigid material hardness tester, teclock proposes lots of measuring methods of measuring. It complies to international standards din iso 48, iso 48, astm d 1415 and din 53505. Fowler full warranty 527600000 hardness tester file set, 0. To measure the hardness of a certain kind of rubber durometer, an internationally accepted device, is used. Gs744 durometer this is available as teclock original durometer based on customers requirement, even though they are not ruled in jis or iso.
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