![]() With dozens of varieties for endless applications, a good selection of sandpaper is a must-have for enthusiasts, if you choose the right type and grit. Specification is used to ensure that the abrasive in question 'generallyĬonforms' to a set of dimensions. Although the details will vary depending on what you’re using it for, the general rule of thumb is to start with a coarse-grit paper such as 60 or 80, and then progress through 120-grit and finally 180- or 240-grit for a smooth-as-silk result. Tired of lackluster DIY results Transform your woodworking and restore rusted surfaces by leveraging sandpaper, the overlooked hero of any well-stocked garage. Sandpaper grit ranges can be divided into two types: micro and macro grit sandpapers. ![]() Small, and it's not possible to measure each one individually, so a Table of Contents What Does the Sandpaper Grit Number Mean Every piece of sandpaper carries a specific grit rating. 'specification', not an absolute measure. The way in which 'grit' is defined is typically as a The smaller the number, the larger or coarser the grain, says Steven Hutchinson of Flexovit. ![]() The grit number is the number of holes per square inch in the sieve that sorts the abrasive material. * micron, also expressed as μm or micrometre (micro-metre) is one-one millionth of a metre, 0.0000001m, 1.000 × 10 −6 m, 1/1000mm, 39.37 x 10 −6 inch, 0.000039" or in terms we might be able to comprehend, a piece of standard, good quality copy paper is 100 microns thick, human head hair is said to be between 17-150 microns in diameter. The numbers on the back of the sandpaper refer to the paper’s grit rating. The common denominator in this table is the "stated 'grit' size", which does make labelling easy, but the problem is that grits aint grits! As you will see, for any given grit size, there is no commonality based on the only unchanging measure available to us, abrasive particle size in microns* I have tried to make it as easy to understand as possible, and to try and explain the difference in the abrasive particle sizes in most of the commonly found materials as pertains to 'sharpening'. While it is as all encompassing as is possible, there are limitations to what can be presented in such a table with respect to the amount of data, the way it can be presented and even avoiding "information overload". This list of 'grit sizes' is as complete as I can make it with the available information at the present moment in time and from the information provided by manufacturers and standards associations.Īt the time of this compilation, to the best of my knowledge, there is no other table of abrasives and their relative sizes as complete and broad ranging as the one presented above.
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