Global Brake Dimensions Magnetic Particle Clutches & Brakes Dimensions Model A B GBAM - 57.3 GBAM-AIR Keyway E F G H J K L 173.1 14 H8 C D* None M5 x 0.8 122.2 34.9 9.3 3.5 22.8 11.6 211.8 THRU 134.9 U V W 60.4 X 173.4 109.6 173.1 14 H8 None M5 x 0.8 122.2 34.9 9.3 3.5 21.2 11.6 211.8 66.7 134.9 60.4 GBA - 2.26 6.82 0.500 None M5 x 0.8 4.81 1.38 0.37 0.14 0.90 0.46 8.34 THRU 5.31 2.38 GBA-AIR 6.84 4.32 6.82 0.500 None M5 x 0.8 4.81 1.38 0.37 0.14 0.87 0.46 8.34 2.63 5.31 2.38 GBBM - 58.1 189.3 17 H8 5 x 2.5 M5 x 0.8 139.7 44.5 11.1 3.5 22.0 12.0 211.8 THRU 150.9 61.2 173.4 110.4 189.3 17 H8 5 x 2.5 M5 x 0.8 139.7 44.5 11.1 3.5 20.4 12.0 211.8 69.1 150.9 61.2 GBBM-AIR GBB - 2.29 7.46 0.625 3/16 x 3/32 M5 x 0.8 5.50 1.75 0.44 0.20 0.81 0.48 8.34 THRU 5.94 2.41 GBB-AIR 6.84 4.35 7.46 0.625 3/16 x 3/32 M5 x 0.8 5.50 1.75 0.44 0.20 0.81 0.48 8.34 2.72 5.94 2.41 GBCM - 63.4 229.7 19 H8 6x3 M6 x 1.0 176.2 47.6 11.1 4.0 26.6 14.6 246.0 THRU 190.5 66.8 206.4 115.9 229.7 19 H8 6x3 M6 x 1.0 176.2 47.6 11.1 4.0 25.1 14.6 246.0 74.6 190.5 66.8 GBCM-AIR GBCA - 2.50 9.05 0.750 3/16 x 3/32 M6 x 1.0 6.94 1.88 0.44 0.16 1.05 0.58 9.69 THRU 7.50 2.63 GBC-AIR 8.13 4.57 9.05 0.750 3/16 x 3/32 M6 x 1.0 6.94 1.88 0.44 0.16 0.99 0.58 9.69 2.94 7.50 2.63 GBDM - 71.4 265.4 25 H8 8 x 3.5 M8 x 1.25 209.6 60.3 12.7 5.5 28.6 18.7 281.7 THRU 225.4 74.6 241.3 123.7 265.4 25 H8 8 x 3.5 M8 x 1.25 209.6 60.3 12.7 5.5 27.1 18.7 281.7 84.1 225.4 74.6 GBDM-AIR GBD - 2.81 10.45 1.000 1/4 x 1/8 M8 x 1.25 8.25 2.38 0.50 0.22 1.13 0.74 11.09 THRU 8.88 2.94 GBD-AIR 9.50 4.87 10.45 1.000 1/4 x 1/8 M8 x 1.25 8.25 2.38 0.50 0.22 1.07 0.74 11.09 8.88 2.94 GBEM - 83.4 341.6 35 H8 10 X 4 M8 x 1.25 282.6 69.9 21.8 5.3 36.6 24.7 357.7 THRU 301.6 86.6 317.5 142.1 341.6 35 H8 10 X 4 M8 x 1.25 282.6 69.9 21.8 5.3 35.1 24.7 357.7 111.0 301.6 86.6 GBEM-AIR 3.31 GBE - 3.28 13.46 1.375 5/16 x 3/16 M8 x 1.25 11.13 2.75 0.86 0.21 1.44 0.97 14.08 THRU 11.88 3.41 GBE-AIR 12.50 5.59 13.46 1.375 5/16 x 3/16 M8 x 1.25 11.13 2.75 0.86 2.75 1.38 0.97 14.08 3.41 GBFM - 14 x 5 M12 x 1.75 373.8 88.9 23.4 88.9 41.6 42.2 466.3 THRU 400.1 154.8 GBFM-AIR 118.4 440.4 45 H8 425.5 210.3 440.4 45 H8 4.37 11.88 14 x 5 M12 x 1.75 373.8 88.9 23.4 88.9 40.1 42.2 466.3 170.0 400.1 154.8 GBF - 4.66 17.35 1.750 3/8 x 3/16 M12 x 1.75 14.72 3.50 0.92 3.50 1.64 1.66 17.35 THRU 15.75 6.09 GBF-AIR 16.75 8.28 17.35 1.750 3/8 x 3/16 M12 x 1.75 14.72 3.50 0.92 3.50 1.58 1.66 17.35 6.09 * +0.001 / -0.000 118 Magnetic Particle Clutches & Brakes 6.69 15.75