Metal Finishing Guide Book

2011-2012 Surface Finishing Guidebook

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Table II. Approximate Weight Table for Spiral Sewed Pieced Buffs REGULAR Approx. 3 Lbs. Per Diameter (in.) 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 100 Sections 7.4 11.5 16.6 22.1 29.4 36.5 46.0 55.6 66.3 77.7 90.2 103.5 117.7 132.9 149.0 166.1 184.0 202.9 222.6 243.4 265.2 /4 in. Thick Sections Per 100 Lbs. 1351 870 602 452 340 274 217 180 151 129 111 97 85 76 67 60 54 49 45 41 38 Approx. 5 Lbs. Per 100 Sections 8.2 12.8 18.4 25.0 32.7 41.3 51.0 61.7 73.5 86.2 100.0 114.8 130.6 147.4 165.3 184.2 204.1 225.0 246.9 269.9 294.1 HEAVY /16 in. Thick Sections Per 100 Lbs. 1220 781 543 400 306 242 196 162 136 116 100 87 77 68 60 51 49 44 40 37 34 Approx. 3 Lbs. Per 100 Sections 11.1 17.3 24.9 33.0 44.1 54.8 69.0 83.4 99.5 116.6 135.3 155.3 176.6 199.4 223.5 249.0 276.0 304.4 333.9 365.1 397.8 EXTRA HEAVY /8 in. Thick Sections Per 100 Lbs. 900 578 401 303 227 182 145 119 100 86 74 64 57 50 45 40 36 33 29 27 25 piece surface. Clinch rings permit use of reusable metal inserts for substantial sav- ings (Fig. 5). PUCKERED BUFFS Puckered buffs are rated by numbers. Higher numbers indicate greater cloth con- tent, buff density, and face convolutions (Fig. 6). Higher densities and closer con- volutions increase cutting and reduce streaking. Open-Face Cloth Buffs The open-face buff prevents loading, packing, clogging, and ridging during fin- ishing 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, com- pound 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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