如何决定B的尺寸

密封件的公称尺寸 腔体尺寸 NOK部品番号 d D h φd φD φD1 HA HB C 6.3 16.3 8 6.3 16.3 15.3 9 11 2.5 FU0024D0 7.1 17.1 8 7.1 17.1 16.1 FU0030D0 8 18 8 8 18 17 FU0043D0 9 19 8 9 19 18 FU0054D0 10 20 8 10 20 19 FU0069D0 11.2 21.2 8 11.2 21.2 20.2 FU0081D0 12 25 8 12 25 24 FU0093D0 12.5 22.5 8 12.5 22.5 21.5 FU0102D0 14 24 8 14 24 23 FU0122D0 15 25 8 15 25 24 FU0135D0 16 26 8 16 26 25 FU0157D0 32 10 16 32 31 11 13 FU0161D0 18 28 8 18 28 27 9 11 3.5 FU0182D0 31 10 18 31 30 11 13 FU0186D0 20 30 8 20 30 29 9 11 FU0215D0 33 10 20 33 32 11 13 FU0221D0 35 10 20 35 34 FU0224D0 21.5 31.5 8 21.5 31.5 30.5 9 11 FU0239D0 22 32 8 22 32 31 FU0246D0 35 10 22 35 34 11 13 FU0249D0 22.4 30 5 22.4 30 29 5.7 7.7 FU0260D0 32.4 8 22.4 32.4 31.4 9 11 FU0263D0 25 35 8 25 35 34 FU0282D0 38 8 25 38 37 FU0287D0 40 10 25 40 39 11 13 FU0292D0 45 12 25 45 44 13 15 FU0301D0 25.5 35.5 8 25.5 35.5 34.5 9 11 FU0309D1 28 35.5 5 28 35.5 34.5 5.7 8.7 FU0320D1 40 10 28 40 39 11 14 FU0330D0 43 10 28 43 42 FU0340D0 30 45 10 30 45 44 FU0368D0 46 10 30 46 45 FU0369D0 31.5 46.5 10 31.5 46.5 45.5 FU0387D0 32 46 10 32 46 45 4 FU0403D0 35 50 10 35 50 49 FU0437D0 35.5 45 6 35.5 45 44 7 10 FU0451D0 50.5 10 35.5 50.5 49.5 11 14 FU0456D0 38 52 10 38 52 51 FU0470D0 40 55 10 40 55 54 FU0505D0 56 10 40 56 55 FU0508D0 60 12 40 60 59 13 16 FU0514D0 41 56 10 41 56 55 11 14 FU0523D0 45 56 7 45 56 55 8 11 FU0572D1 60 10 45 60 59 11 14 FU0577D0 61 10 45 61 60 FU0579D0 46 60 10 46 60 59 FU0588D0 48 63 10 48 63 62 FU0601D0 50 65 10 50 65 64 FU0631D0 66 12 50 66 65 13 16 FU0635D0 70 12 50 70 69 FU0639D0 51 71 12 51 71 70 FU0669D0 53 73 12 53 73 72 FU0683D0 55 71 12 55 71 70 FU0704D0 75 12 55 75 74 FU0708D0 80 15 55 80 79 16 19 FU0712D0 56 72 12 56 72 71 13 16 FU0727D0 76 12 56 76 75 FU0728D0 58 78 12 58 78 77 FU0736D0 60 71 7 60 71 70 8 11 FU0750D0 80 12 60 80 79 13 16 FU0761D0 62 82 12 62 82 81 FU0777D0 63 83 12 63 83 82 FU0793D0 65 85 12 65 85 84 5 FU0819D0 67 87 12 67 87 86 FU0831D0 70 90 12 70 90 89 FU0862D0 71 80 6 71 80 79 7 10 FU0879D1 91 12 71 91 90 13 16 FU0884D0 75 95 12 75 95 94 FU0910D0 80 100 12 80 100 98 FU0948D0 100 15 80 100 98 16 19 FU0949D0 85 100 9 85 100 98 10 13 FU0984D1 105 12 85 105 103 13 16 FU0989D0 90 110 12 90 110 108 FU1030D0 92 112 12 92 112 110 FU1042D0 95 115 12 95 115 113 FU1056D0 120 15 95 120 118 16 19 FU1061D0 98 112 9 98 112 110 10 13 FU1068D0 100 120 12 100 120 118 13 16 FU1089D0 125 15 100 125 123 17 20 FU1096D0 105 125 15 105 125 123 FU1129D0 106 120 8.5 106 120 118 9.5 12.5 FU1135D1 126 15 106 126 124 17 20 FU1138D0 110 130 15 110 130 128 FU1165D0 112 132 15 112 132 130 FU1182D0 115 135 15 115 135 133 FU1198D0 118 132 9 118 132 130 10 13 FU1932D0 138 15 118 138 136 17 20 FU1207D0 120 140 15 120 140 138 FU1224D0 125 145 15 125 145 143 FU1257D0 130 150 15 130 150 148 6.5 FU1284D0 132 152 15 132 152 150 FU1292D0 135 155 15 135 155 153 FU1305D0 136 150 9 136 150 148 10 13 FU1933D0 140 160 15 140 160 158 17 20 FU1327D0 165 15 140 165 163 FU1330D0 145 165 15 145 165 163 FU1344D0 150 170 15 150 170