![]() Within limits, I don't much care how much it costs if it gets the sanding done sooner rather than later with a great result. So what have you found that you really like? I want extremely uniform grit (hate that one deep scratch), as fast as possible, it should last long enough to sand a modest size piece with a few square inches of paper, and it should be fast (yes, I said that twice). It really doesn't seem to like it if you push too hard and heat it up. I use Abranet disks on my ROS mostly, for turnings I've found it to be overly flexible and slow. The stuff I got is on a way too heavy backing, won't hold a curve (cracks to a sharp angle when you fold it over), and doesn't last for beans. They are also good when hand held, bit it doesn't seem to make sense to pay for small disks with velcro backing when I only need a plain paper.Ī couple years ago I bought the bargain box from Klingspor and have been working my way through it, hating every minute. I use the blue or green disks from Vince's for power sanding and they work quite well for me. I need better sandpaper for hand sanding on the lathe. Sanding blocks are also made in which the abrasive, instead of being a coating on the block's surface, is incorporated throughout the block.(I posted this at SMC, but thought I'd ask here as well, apologies to those who see it both places) The better ones are claimed to last 5 times longer than sandpaper, and are water-washable. Those with sharp angles are particularly useful. Most are hand-sized, blocks 1 inch thick, 4½ inches long, and around 2¾ to 3¾ inches thick. ![]() Sponge blockįoam blocks coated with abrasive are a popular substitute for a sanding block In grades from 120 to 280, in the same materials as tape. The abrasive is coated on a round cord from 0.012 to 0.093 inch in diameter, ![]() In widths from ¹⁄₁₆ to ¼ inch, with grades of 150 and 180 in aluminum oxide and silicon carbide. These are cylinders that fit over rubber drums used, for example, on drill presses. Sanding appliances often call for a fraction of a sheet, and the fractional sizes are available.ĭiameters of 6″, 8″, 9″, 10″, 12″, and 15″. The standard sheet of sandpaper is 9 by 11 inches. Sandpaper is available in a wide variety of forms: Sheets Weight is usually found only in heavy duty industrial applications. Weight is used when the sandpaper must conform to curved surfaces, and the Y The A and B weights are used for finishing papers, C and D are general purpose weights, D and E are suitable for machine sanding, and F is used for belts.Ĭloth backings are made in J, X, and Y weights, with Y the heaviest. Paper backings are made in grades A through F, with F being heaviest. BackingĪn abrasive “paper” may be backed with either paper, cloth or a The glue used in light duty papers is not waterproof. The grains of abrasive are held on the backing by glue, resin, or a combination of the two. Because it can leave a deposit, stearated paper should not be used if a water-based finish will be applied. Such paper is useful for sanding resinous woods and some finishes. Some paper is treated with a soap-like substance to reduce clogging (“ stearated” or “ nonclog” sandpaper). Wood is best sanded with open coat paper. Paper it covers 50% to 70% of the surface, the advantage being that the paperĭoesn't clog as easily. The grit covers 100% of the surface on open-coat The abrasive may be any of the materials listed below. The remaining grades are used mainly in finishing metal and are most easily found at automotive supply stores.ġ000 to 1500 are used in rubbing out lacquer finishes on wood. Many workers feel 180 is as fine a grade as need be used on raw wood that is to be varnished or lacquered.Ĭoarsest grade used to sand grain raised by stain.įinest grit available in stearated paper. CAMIĬoarsest grade needed in finishing surfaced lumber. But the CGPM, the controlling authority for SI, says microns should be called micrometers. In the abrasives industry, particle size is typically expressed in microns. See the Standards section below for sources of detailed information. In F220 (a “microgrit”), no more than 3% can be larger than 75 microns, at least 50% must be in the range 50.0 to 56.0, and at least 94% must be larger than 45 microns. For example, by the FEPA standard for macrogrits grade F180, no more than 3% by mass of the grit can have a particle size larger than 90 microns, and at least 94% must be larger than 53 microns. The two systems are not strictly comparable, because FEPA defines a grade by specifying a range of grain sizes, while CAMI specifies an average particle size. Worldwide, the FEPA system is more common. There are several standards for coated abrasives, but by far the most commonly used are those of the Coated Abrasives Manufacturer's Institute (CAMI) and the Federation of European Producers of Abrasives (FEPA).
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