(White with Blue Stripe)
Efficient Operating Range is 25% to 50% deflection of free length. Maximum deflection is 50%; Long Life deflection is 40%; Optimum Life deflection is 25%. Deflection beyond this Efficient Operating Range could result in premature spring failure. Travel to Solid is a reference dimension only and should never be approached during use.
50% Deflection | 40% Deflection | 25% Deflection | Travel to Solid | |||||||||||
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Part# | Free Length (In) |
Free Length (mm) |
Load (lbs) | Deflection Length | Load (lbs) | Deflection Length) | Load (lbs) | Deflection Length | Load (lbs) | Deflection Length | Load @ .1″ Deflection (lbs) |
Hole Dia. | Rod Dia. | |
M37-100 | 1 | 25.4 | 37 | 0.500 | 29 | 0.400 | 18 | 0.250 | 42 | 0.572 | 7.3 | 3/8 | 3/16 | |
M37-125 | 1.25 | 31.8 | 41 | 0.625 | 33 | 0.500 | 20 | 0.313 | 47 | 0.725 | 6.5 | 3/8 | 3/16 | |
M37-150 | 1.5 | 38.1 | 38 | 0.750 | 30 | 0.600 | 19 | 0.375 | 45 | 0.896 | 5.0 | 3/8 | 3/16 | |
M37-175 | 1.75 | 44.5 | 37 | 0.875 | 29 | 0.700 | 18 | 0.438 | 46 | 1.088 | 4.2 | 3/8 | 3/16 | |
M37-200 | 2 | 50.8 | 38 | 1.000 | 30 | 0.800 | 19 | 0.500 | 44 | 1.163 | 3.8 | 3/8 | 3/16 | |
M37-250 | 2.5 | 63.5 | 38 | 1.250 | 30 | 1.000 | 19 | 0.625 | 47 | 1.552 | 3.0 | 3/8 | 3/16 | |
M37-300 | 3 | 76.2 | 30 | 1.500 | 24 | 1.200 | 15 | 0.750 | 36 | 1.821 | 2.0 | 3/8 | 3/16 | |
M37-1200 | 12 | 304.8 | 42 | 6.000 | 34 | 4.800 | 21 | 3.000 | 55 | 7.800 | 0.7 | 3/8 | 3/16 | |
M50-100 | 1 | 25.4 | 55 | 0.500 | 44 | 0.400 | 28 | 0.250 | 59 | 0.536 | 11.0 | 1/2 | 9/32 | |
M50-125 | 1.25 | 31.8 | 55 | 0.625 | 44 | 0.500 | 28 | 0.313 | 63 | 0.719 | 8.8 | 1/2 | 9/32 | |
M50-150 | 1.5 | 38.1 | 59 | 0.750 | 47 | 0.600 | 29 | 0.375 | 65 | 0.831 | 7.8 | 1/2 | 9/32 | |
M50-175 | 1.75 | 44.5 | 51 | 0.875 | 41 | 0.700 | 25 | 0.438 | 56 | 0.972 | 5.8 | 1/2 | 9/32 | |
M50-200 | 2 | 50.8 | 52 | 1.000 | 42 | 0.800 | 26 | 0.500 | 57 | 1.091 | 5.2 | 1/2 | 9/32 | |
M50-250 | 2.5 | 63.5 | 63 | 1.250 | 50 | 1.000 | 31 | 0.625 | 73 | 1.464 | 5.0 | 1/2 | 9/32 | |
M50-300 | 3 | 76.2 | 53 | 1.500 | 42 | 1.200 | 26 | 0.750 | 65 | 1.850 | 3.5 | 1/2 | 9/32 | |
M50-350 | 3.5 | 88.9 | 56 | 1.750 | 45 | 1.400 | 28 | 0.875 | 70 | 2.190 | 3.2 | 1/2 | 9/32 | |
M50-450 | 4.5 | 114.3 | 56 | 2.250 | 45 | 1.800 | 28 | 1.125 | 68 | 2.736 | 2.5 | 1/2 | 9/32 | |
M50-550 | 5.5 | 139.7 | 58 | 2.750 | 46 | 2.200 | 29 | 1.375 | 72 | 3.436 | 2.1 | 1/2 | 9/32 | |
M50-650 | 6.5 | 165.1 | 49 | 3.250 | 39 | 2.600 | 24 | 1.625 | 57 | 3.787 | 1.5 | 1/2 | 9/32 | |
M50-750 | 7.5 | 190.5 | 45 | 3.750 | 36 | 3.000 | 23 | 1.875 | 49 | 4.075 | 1.2 | 1/2 | 9/32 | |
M50-1200 | 12 | 304.8 | 48 | 6.000 | 38 | 4.800 | 24 | 3.000 | 50 | 6.215 | 0.8 | 1/2 | 9/32 | |
M62-100 | 1 | 25.4 | 95 | 0.500 | 76 | 0.400 | 48 | 0.250 | 100 | 0.528 | 19.0 | 5/8 | 11/32 | |
M62-125 | 1.25 | 31.8 | 89 | 0.625 | 72 | 0.500 | 45 | 0.313 | 95 | 0.665 | 14.3 | 5/8 | 11/32 | |
M62-150 | 1.5 | 38.1 | 98 | 0.750 | 78 | 0.600 | 49 | 0.375 | 111 | 0.850 | 13.0 | 5/8 | 11/32 | |
M62-175 | 1.75 | 44.5 | 86 | 0.875 | 69 | 0.700 | 43 | 0.438 | 96 | 0.982 | 9.8 | 5/8 | 11/32 | |
M62-200 | 2 | 50.8 | 102 | 1.000 | 82 | 0.800 | 51 | 0.500 | 115 | 1.126 | 10.2 | 5/8 | 11/32 | |
M62-250 | 2.5 | 63.5 | 91 | 1.250 | 73 | 1.000 | 46 | 0.625 | 108 | 1.476 | 7.3 | 5/8 | 11/32 | |
M62-300 | 3 | 76.2 | 99 | 1.500 | 79 | 1.200 | 50 | 0.750 | 122 | 1.842 | 6.6 | 5/8 | 11/32 | |
M62-350 | 3.5 | 88.9 | 88 | 1.750 | 70 | 1.400 | 44 | 0.875 | 111 | 2.229 | 5.0 | 5/8 | 11/32 | |
M62-400 | 4 | 101.6 | 92 | 2.000 | 74 | 1.600 | 46 | 1.000 | 119 | 2.577 | 4.6 | 5/8 | 11/32 | |
M62-1200 | 12 | 304.8 | 96 | 6.000 | 77 | 4.800 | 48 | 3.000 | 122 | 7.609 | 1.6 | 5/8 | 11/32 | |
M75-100 | 1 | 25.4 | 188 | 0.500 | 150 | 0.400 | 94 | 0.250 | 194 | 0.516 | 37.6 | 3/4 | 3/8 | |
M75-125 | 1.25 | 31.8 | 179 | 0.625 | 144 | 0.500 | 90 | 0.313 | 191 | 0.665 | 28.7 | 3/4 | 3/8 | |
M75-150 | 1.5 | 38.1 | 167 | 0.750 | 133 | 0.600 | 83 | 0.375 | 175 | 0.788 | 22.2 | 3/4 | 3/8 | |
M75-175 | 1.75 | 44.5 | 162 | 0.875 | 130 | 0.700 | 81 | 0.438 | 173 | 0.934 | 18.5 | 3/4 | 3/8 | |
M75-200 | 2 | 50.8 | 161 | 1.000 | 129 | 0.800 | 81 | 0.500 | 174 | 1.081 | 16.1 | 3/4 | 3/8 | |
M75-250 | 2.5 | 63.5 | 159 | 1.250 | 127 | 1.000 | 79 | 0.625 | 174 | 1.374 | 12.7 | 3/4 | 3/8 | |
M75-300 | 3 | 76.2 | 158 | 1.500 | 126 | 1.200 | 79 | 0.750 | 175 | 1.667 | 10.5 | 3/4 | 3/8 | |
M75-350 | 3.5 | 88.9 | 156 | 1.750 | 125 | 1.400 | 78 | 0.875 | 175 | 1.961 | 8.9 | 3/4 | 3/8 | |
M75-400 | 4 | 101.6 | 154 | 2.000 | 123 | 1.600 | 77 | 1.000 | 174 | 2.254 | 7.7 | 3/4 | 3/8 | |
M75-450 | 4.5 | 114.3 | 155 | 2.250 | 124 | 1.800 | 78 | 1.125 | 176 | 2.547 | 6.9 | 3/4 | 3/8 | |
M75-500 | 5 | 127 | 153 | 2.500 | 122 | 2.000 | 76 | 1.250 | 173 | 2.841 | 6.1 | 3/4 | 3/8 | |
M75-550 | 5.5 | 139.7 | 154 | 2.750 | 123 | 2.200 | 77 | 1.375 | 176 | 3.134 | 5.6 | 3/4 | 3/8 | |
M75-600 | 6 | 152.4 | 153 | 3.000 | 122 | 2.400 | 77 | 1.500 | 175 | 3.426 | 5.1 | 3/4 | 3/8 | |
M75-650 | 6.5 | 165.1 | 153 | 3.250 | 122 | 2.600 | 76 | 1.625 | 175 | 3.720 | 4.7 | 3/4 | 3/8 | |
M75-750 | 7.5 | 190.5 | 154 | 3.750 | 123 | 3.000 | 77 | 1.875 | 177 | 4.306 | 4.1 | 3/4 | 3/8 | |
M75-1200 | 12 | 304.8 | 150 | 6.000 | 120 | 4.800 | 75 | 3.000 | 174 | 6.945 | 2.5 | 3/4 | 3/8 | |
M100-100 | 1 | 25.4 | 290 | 0.500 | 232 | 0.400 | 145 | 0.250 | 295 | 0.509 | 58.0 | 1 | 1/2 | |
M100-125 | 1.25 | 31.8 | 330 | 0.625 | 264 | 0.500 | 165 | 0.313 | 350 | 0.663 | 52.8 | 1 | 1/2 | |
M100-150 | 1.5 | 38.1 | 301 | 0.750 | 241 | 0.600 | 150 | 0.375 | 318 | 0.792 | 40.1 | 1 | 1/2 | |
M100-175 | 1.75 | 44.5 | 294 | 0.875 | 235 | 0.700 | 147 | 0.438 | 317 | 0.944 | 33.6 | 1 | 1/2 | |
M100-200 | 2 | 50.8 | 289 | 1.000 | 231 | 0.800 | 145 | 0.500 | 317 | 1.097 | 28.9 | 1 | 1/2 | |
M100-250 | 2.5 | 63.5 | 283 | 1.250 | 226 | 1.000 | 141 | 0.625 | 317 | 1.403 | 22.6 | 1 | 1/2 | |
M100-300 | 3 | 76.2 | 279 | 1.500 | 223 | 1.200 | 140 | 0.750 | 318 | 1.709 | 18.6 | 1 | 1/2 | |
M100-350 | 3.5 | 88.9 | 277 | 1.750 | 221 | 1.400 | 138 | 0.875 | 318 | 2.014 | 15.8 | 1 | 1/2 | |
M100-400 | 4 | 101.6 | 274 | 2.000 | 219 | 1.600 | 137 | 1.000 | 318 | 2.320 | 13.7 | 1 | 1/2 | |
M100-450 | 4.5 | 114.3 | 272 | 2.250 | 218 | 1.800 | 136 | 1.125 | 318 | 2.625 | 12.1 | 1 | 1/2 | |
M100-500 | 5 | 127 | 270 | 2.500 | 216 | 2.000 | 135 | 1.250 | 317 | 2.931 | 10.8 | 1 | 1/2 | |
M100-550 | 5.5 | 139.7 | 270 | 2.750 | 216 | 2.200 | 135 | 1.375 | 317 | 3.236 | 9.8 | 1 | 1/2 | |
M100-600 | 6 | 152.4 | 270 | 3.000 | 216 | 2.400 | 135 | 1.500 | 319 | 3.542 | 9.0 | 1 | 1/2 | |
M100-700 | 7 | 177.8 | 266 | 3.500 | 213 | 2.800 | 133 | 1.750 | 316 | 4.154 | 7.6 | 1 | 1/2 | |
M100-800 | 8 | 203.2 | 268 | 4.000 | 214 | 3.200 | 134 | 2.000 | 319 | 4.764 | 6.7 | 1 | 1/2 | |
M100-1200 | 12 | 304.8 | 264 | 6.000 | 211 | 4.800 | 132 | 3.000 | 317 | 7.21 | 4.4 | 1 | 1/2 | |
M125-150 | 1.5 | 38.1 | 389 | 0.750 | 311 | 0.600 | 194 | 0.375 | 410 | 0.792 | 51.8 | 1-1/4 | 5/8 | |
M125-175 | 1.75 | 44.5 | 350 | 0.875 | 280 | 0.700 | 175 | 0.438 | 374 | 0.935 | 40.0 | 1-1/4 | 5/8 | |
M125-200 | 2 | 50.8 | 357 | 1.000 | 286 | 0.800 | 179 | 0.500 | 413 | 1.156 | 35.7 | 1-1/4 | 5/8 | |
M125-250 | 2.5 | 63.5 | 391 | 1.250 | 313 | 1.000 | 196 | 0.625 | 464 | 1.481 | 31.3 | 1-1/4 | 5/8 | |
M125-300 | 3 | 76.2 | 383 | 1.500 | 306 | 1.200 | 191 | 0.750 | 460 | 1.804 | 25.5 | 1-1/4 | 5/8 | |
M125-350 | 3.5 | 88.9 | 378 | 1.750 | 302 | 1.400 | 189 | 0.875 | 460 | 2.131 | 21.6 | 1-1/4 | 5/8 | |
M125-400 | 4 | 101.6 | 374 | 2.000 | 299 | 1.600 | 187 | 1.000 | 459 | 2.457 | 18.7 | 1-1/4 | 5/8 | |
M125-450 | 4.5 | 114.3 | 371 | 2.250 | 297 | 1.800 | 186 | 1.125 | 459 | 2.784 | 16.5 | 1-1/4 | 5/8 | |
M125-500 | 5 | 127 | 370 | 2.500 | 296 | 2.000 | 185 | 1.250 | 461 | 3.112 | 14.8 | 1-1/4 | 5/8 | |
M125-550 | 5.5 | 139.7 | 369 | 2.750 | 295 | 2.200 | 184 | 1.375 | 460 | 3.435 | 13.4 | 1-1/4 | 5/8 | |
M125-600 | 6 | 152.4 | 366 | 3.000 | 293 | 2.400 | 183 | 1.500 | 458 | 3.758 | 12.2 | 1-1/4 | 5/8 | |
M125-700 | 7 | 177.8 | 364 | 3.500 | 291 | 2.800 | 182 | 1.750 | 459 | 4.418 | 10.4 | 1-1/4 | 5/8 | |
M125-800 | 8 | 203.2 | 364 | 4.000 | 291 | 3.200 | 182 | 2.000 | 461 | 5.068 | 9.1 | 1-1/4 | 5/8 | |
M125-1000 | 10 | 254 | 360 | 5.000 | 288 | 4.000 | 180 | 2.500 | 459 | 6.375 | 7.2 | 1-1/4 | 5/8 | |
M125-1200 | 12 | 304.8 | 360 | 6.000 | 288 | 4.800 | 180 | 3.000 | 461 | 7.681 | 6.0 | 1-1/4 | 5/8 | |
M150-200 | 2 | 50.8 | 450 | 1.000 | 360 | 0.800 | 225 | 0.500 | 504 | 1.120 | 45.0 | 1-1/2 | 3/4 | |
M150-250 | 2.5 | 63.5 | 525 | 1.250 | 420 | 1.000 | 263 | 0.625 | 572 | 1.361 | 42.0 | 1-1/2 | 3/4 | |
M150-300 | 3 | 76.2 | 519 | 1.500 | 415 | 1.200 | 260 | 0.750 | 603 | 1.744 | 34.6 | 1-1/2 | 3/4 | |
M150-350 | 3.5 | 88.9 | 520 | 1.750 | 416 | 1.400 | 260 | 0.875 | 584 | 1.966 | 29.7 | 1-1/2 | 3/4 | |
M150-400 | 4 | 101.6 | 532 | 2.000 | 426 | 1.600 | 266 | 1.000 | 624 | 2.344 | 26.6 | 1-1/2 | 3/4 | |
M150-450 | 4.5 | 114.3 | 513 | 2.250 | 410 | 1.800 | 257 | 1.125 | 592 | 2.595 | 22.8 | 1-1/2 | 3/4 | |
M150-500 | 5 | 127 | 500 | 2.500 | 400 | 2.000 | 250 | 1.250 | 592 | 2.960 | 20.0 | 1-1/2 | 3/4 | |
M150-550 | 5.5 | 139.7 | 506 | 2.750 | 405 | 2.200 | 253 | 1.375 | 589 | 3.203 | 18.4 | 1-1/2 | 3/4 | |
M150-600 | 6 | 152.4 | 480 | 3.000 | 384 | 2.400 | 240 | 1.500 | 569 | 3.554 | 16.0 | 1-1/2 | 3/4 | |
M150-700 | 7 | 177.8 | 497 | 3.500 | 398 | 2.800 | 249 | 1.750 | 591 | 4.162 | 14.2 | 1-1/2 | 3/4 | |
M150-800 | 8 | 203.2 | 516 | 4.000 | 413 | 3.200 | 258 | 2.000 | 626 | 4.856 | 12.9 | 1-1/2 | 3/4 | |
M150-1000 | 10 | 254 | 500 | 5.000 | 400 | 4.000 | 250 | 2.500 | 609 | 6.094 | 10.0 | 1-1/2 | 3/4 | |
M150-1200 | 12 | 304.8 | 492 | 6.000 | 394 | 4.800 | 246 | 3.000 | 588 | 7.172 | 8.2 | 1-1/2 | 3/4 | |
M200-250 | 2.5 | 63.5 | 1216 | 1.250 | 973 | 1.000 | 608 | 0.625 | 1245 | 1.280 | 97.3 | 2 | 1 | |
M200-300 | 3 | 76.2 | 1140 | 1.500 | 912 | 1.200 | 570 | 0.750 | 1178 | 1.55 | 76.0 | 2 | 1 | |
M200-350 | 3.5 | 88.9 | 1138 | 1.750 | 910 | 1.400 | 569 | 0.875 | 1192 | 1.834 | 65.0 | 2 | 1 | |
M200-400 | 4 | 101.6 | 1128 | 2.000 | 902 | 1.600 | 564 | 1.000 | 1199 | 2.125 | 56.4 | 2 | 1 | |
M200-450 | 4.5 | 114.3 | 1105 | 2.250 | 884 | 1.800 | 552 | 1.125 | 1157 | 2.356 | 49.1 | 2 | 1 | |
M200-500 | 5 | 127 | 1095 | 2.500 | 876 | 2.000 | 548 | 1.250 | 1202 | 2.745 | 43.8 | 2 | 1 | |
M200-550 | 5.5 | 139.7 | 1108 | 2.750 | 887 | 2.200 | 554 | 1.375 | 1198 | 2.972 | 40.3 | 2 | 1 | |
M200-600 | 6 | 152.4 | 1116 | 3.000 | 893 | 2.400 | 558 | 1.500 | 1221 | 3.282 | 37.2 | 2 | 1 | |
M200-700 | 7 | 177.8 | 1071 | 3.500 | 857 | 2.800 | 536 | 1.750 | 1165 | 3.806 | 30.6 | 2 | 1 | |
M200-800 | 8 | 203.2 | 1072 | 4.000 | 858 | 3.200 | 536 | 2.000 | 1190 | 4.439 | 26.8 | 2 | 1 | |
M200-1000 | 10 | 254 | 1050 | 5.000 | 840 | 4.000 | 525 | 2.500 | 1231 | 5.860 | 21.0 | 2 | 1 | |
M200-1200 | 12 | 304.8 | 990 | 6.000 | 792 | 4.800 | 495 | 3.000 | 1118 | 6.775 | 16.5 | 2 | 1 |