Metal Finishing Guide Book

2012-2013

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Table II. Approximate Weight Table for Spiral Sewed Pieced Buffs REGULAR Approx. 3/4 in. Thick Lbs. Per 100 Sections Sections Per 100 Lbs. 4 7.4 5 11.5 6 HEAVY Approx. 5/16 in. Thick Lbs. Per 100 Sections Sections Per 100 Lbs. 1351 8.2 870 12.8 16.6 602 7 22.1 8 29.4 9 10 EXTRA HEAVY Approx. 3/8 in. Thick Lbs. Per 100 Sections Sections Per 100 Lbs. 1220 11.1 900 781 17.3 578 18.4 543 24.9 401 452 25.0 400 33.0 303 340 32.7 306 44.1 227 36.5 274 41.3 242 54.8 182 46.0 217 51.0 196 69.0 145 11 55.6 180 61.7 162 83.4 119 12 66.3 151 73.5 136 99.5 100 13 77.7 129 86.2 116 116.6 86 14 90.2 111 100.0 100 135.3 74 15 103.5 97 114.8 87 155.3 64 16 117.7 85 130.6 77 176.6 57 17 132.9 76 147.4 68 199.4 50 18 149.0 67 165.3 60 223.5 45 19 166.1 60 184.2 51 249.0 40 20 184.0 54 204.1 49 276.0 36 21 202.9 49 225.0 44 304.4 33 22 222.6 45 246.9 40 333.9 29 23 243.4 41 269.9 37 365.1 27 24 265.2 38 294.1 34 397.8 25 Diameter (in.) piece surface. Clinch rings permit use of reusable metal inserts for substantial savings (Fig. 5). PUCKERED BUFFS Puckered buffs are rated by numbers. Higher numbers indicate greater cloth content, buff density, and face convolutions (Fig. 6). Higher densities and closer convolutions increase cutting and reduce streaking. Open-Face Cloth Buffs The open-face buff prevents loading, packing, clogging, and ridging during finishing operations. The plies are configured differently from the closed-face design. Buff material is wound singly or in groups of two, three, four, or more plies. Open-face buffs may be ���straight wound��� or ���spiral wound��� for a corkscrew or cross-cutting action that further minimizes streaking. Buff density varies with the number of plies, the amount of cloth, thread count, fabric weight, and treatment of the cloth. Buff pressure, speed, angle to the part, cloth strength, compound absorption ability, ventilation, and cloth flexibility are varied with buff design. Bias Sisal Buffs ���Iris��� equipment used to gather cloth buffs is adapted to sisal and other materials (Figs. 7-10). Some bias sisal buffs are tapered (wider at the outside than the inside diameter). This reduces gaps between hard sections that could cause 38

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