The hardness of the pool cue tip that you choose will depend on your style of play and whether it is for a playing cue or a breaking pool cue. Conversions from microhardness values to tensile strength and other hardness scales (e.g. The pressure is dramatically increased for this second test with approximately 300 pounds of pressure bearing down on that diamond tip. Here at Albright, we use the Shore A scale to quantify our molded silicone durometers. A high chromium stainless steel which exibits an excellent balance of hardness and corrosion resistance. Tiger Jump/Break Tip - This is a super-hard laminated leather break tip, for those who don't (or can't) go with the phenolic tips. Shore Hardness Scale. The Shore D Scale measures the hardness of hard rubbers and hard plastics. Here are some conclusions: most contact times (i.e., for most tips and most speeds) are very close to a thousandth of a second (0.001 sec). The purpose of these hardness tests is to evaluate the strength of the weld, with particular focus on hardness around the heat-affected zone (HAZ). How long is the tip in contact with the cue ball? For example, you could try to scratch the surface with the point on a crystal of quartz (hardness of 9), the tip of a steel file (hardness about 7), the point of a piece of glass (about 6), the edge of a copper coin (3), or a fingernail (2.5). Tip: … Rockwell) are available for many metals and alloys [2]. The rugged Swiss-made metal NDT hardness testers are designed for portable hardness testing in the lab, in the workshop, at production facilities or on site. From RotoMetals, a supplier of alloy bars, is this tip for hardening lead alloy: For every 1% additional tin, Brinell hardness increases 0.3. The below chart is useful for determining which metals will be impervious to scratching and dinging, as it relates to the Rockwell scale and ductility. Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop ... for the errors in using a conversion chart. Clips HSV A.77-A.81 and A.147-A.151 (external web-link) show close-ups of cue tip impact for various hardness tips and various speeds. It then has a phenolic collar that provides the ultimate in hardness and suppresses tip expansion on impact. The rubber durometer chart below gives you an idea of the rubber hardness that you want for your application. Wood Hardness Chart Species (Alphabetical) Hardness Species (by Hardness) Hardness Mahogany, Honduran 800 Padauk 1725 Mahogany, Santos 2200 Tabaccowood 1750 Maple, Hard North American 1450 Rosewood, Bolivian 1780 Maple, Ivory 1500 Bamboo, Carbonized 1800 Maple, Soft 999 Hickory 1820 Merbau 1925 Pecan 1820 Mesquite 2345 Yellowheart 1820 After quite a lot of research, I have gathered the list of players along with the tip they are using. 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