http://www.matweb.com/reference/shore-hardness.aspx
==Durometer== The Durometer returns a dimensionless (or unitless) value that ranges from zero to 100. It measures hardness and is limited to use with rubbers and polymers. Wikipedia has an article on the Shore Durometer.
Shore hardness 60 deg C corresponds to approximately Shore D 75 on the Shore hardness scale.
Oh, dude, converting Barcol hardness to Shore D hardness is like trying to turn a pineapple into a watermelon. You can't just snap your fingers and make it happen. You'll need to consult some conversion tables or equations to make that magic work. Good luck with that, my friend!
It's the hardness of the material shore a is softer/more elastic. Shore D is harder/stiffer. Then there is a number rating, the higher the number the harder the material.
Janka wood hardness scale - The Janka rating is a measure of the amount of force it takes to push a .444" diameter steel ball half way into a piece of wood. The speed of growth of a tree can effect the Janka rating.
Delrin, a brand name for acetal (polyoxymethylene), does not have a hardness value on the Mohs scale, as this scale is typically used for minerals. However, Delrin has a Shore D hardness of approximately 80 to 90, indicating it is a relatively hard plastic. This hardness makes it suitable for various applications requiring durability and resistance to wear.
To convert Brinell hardness of 300 HB to psi, use the formula: Brinell Hardness (HB) = (12.9 * N) / (D^2), where N is the applied force in kg and D is the diameter of the indention in mm. Given 300 HB, N/A = 1250 and D = 10 for a steel ball. Converting 300 HB to psi: (12.9 * 1250) / (10^2) = 16112.5 psi. To convert 300 HB to MPa: 16112.5 psi * 0.00689476 = 111.1 MPa.
D hardness signals a material's ability to resist scratching. Materials with greater hardness are less likely to get scratched by abrasive surfaces.
shore A is used for flexible material whereas shore B is used for rigid material
Derrick Shore goes by "D".
Those numbers represent a durometer/hardness of the material on what is called a Shore scale. There is more than one Shore scale. In the case for skate wheels the A (a) scale is used. The scale ranges from 0-100. The closer to 100 the harder the material gets. Within skateboarding equipment you may find 101a. Although the scale does not go over 100, manufacturers use numbers above 100 so consumers do not get confused if they were to use another Shore scale like D. Now that you know, to answer your question 86a and 83a are 2 durometers that are pretty close together. In your hand you may not be able to feel the difference. Depending on your skill level and what you are doing, you may or may not tell the difference while skating.
nope