AKA Bearing Preload Washers
65 different sizes in stock from 9.8mm up to 358mm outside diameter
With dimensions to suit most standard roller bearings (radial ball bearings), this range of plain bearing preload disc springs are manufactured from CK75 Carbon Steel (DIN 1.1248) with a zinc phosphate and oiled finish.
The preload disc springs (or washers) assist in maintaining positioning accuracy of the bearing (with no end play) and also minimise vibration and shaft deflections. Correct preloading will also increase bearing rigidity and negate excessive running noise.
Preload disc springs can also be useful in other applications. The relatively low forces of the preloaded disc springs means they could act as light duty linkages or mechanisms.
A note of caution however when considering columns of these disc springs. A ratio of cone height/thickness in excess of 1.50 could cause springs to invert and the column to collapse.
Search the table below if you know the plain bearing preload washer part number.
| Please note: measurements are in millimeters & weight in kilograms | |||||||||
| Ball Bearing Ref. No. |
Disc Spring Code No. |
Outer Dia. (De) |
Inner Dia. (Di) |
Thickness (t) |
Cone Height (ho) |
Total Height (lo) |
Cone Height | Force (N) 75% Defl. |
Weight per 1000 pcs. |
|---|---|---|---|---|---|---|---|---|---|
| Thick. Ratio | |||||||||
| 623 | P986202 | 9.8 | 6.2 | 0.20 | 0.20 | 0.40 | 1.00 | 23 | 0.07 |
| 624 | P12872025 | 12.8 | 7.2 | 0.25 | 0.25 | 0.50 | 1.00 | 29 | 0.16 |
| 625 634 |
P15882025 | 15.8 | 8.2 | 0.25 | 0.30 | 0.55 | 1.20 | 23 | 0.26 |
| 626 635 |
P1889203 | 18.8 | 9.2 | 0.30 | 0.35 | 0.65 | 1.17 | 31 | 0.47 |
| 607 | P188102035 | 18.8 | 10.2 | 0.35 | 0.35 | 0.70 | 1.00 | 51 | 0.51 |
| 608 627 |
P218123035 | 21.8 | 12.3 | 0.35 | 0.40 | 0.75 | 1.14 | 46 | 0.66 |
| 609 | P23714304 | 23.7 | 14.3 | 0.40 | 0.50 | 0.90 | 1.25 | 81 | 0.83 |
| 6000 629 |
P25714304 | 25.7 | 14.3 | 0.40 | 0.50 | 0.90 | 1.25 | 63 | 1.10 |
| 6001 | P27717304 | 27.7 | 17.3 | 0.40 | 0.60 | 1.00 | 1.50 | 80 | 1.10 |
| 6200 | P29717404 | 29.7 | 17.4 | 0.40 | 0.70 | 1.10 | 1.75 | 83 | 1.40 |
| 6002 6201 |
P31720404 | 31.7 | 20.4 | 0.40 | 0.70 | 1.10 | 1.75 | 81 | 1.40 |
| 6300 | P34620404 | 34.6 | 20.4 | 0.40 | 0.70 | 1.10 | 1.75 | 61 | 1.80 |
| 6003 6202 |
P34622405 | 34.6 | 22.4 | 0.50 | 0.70 | 1.20 | 1.40 | 118 | 2.00 |
| 6301 | P36620405 | 36.6 | 20.4 | 0.50 | 0.80 | 1.30 | 1.60 | 110 | 270 |
| 6203 | P39625505 | 39.6 | 25.5 | 0.50 | 0.80 | 1.30 | 1.60 | 110 | 2.70 |
| 6004 6302 |
P41625505 | 41.6 | 25.5 | 0.50 | 0.90 | 1.40 | 1.80 | 113 | 3.10 |
| 6005 6204 6303 |
P46530506 | 46.5 | 30.5 | 0.60 | 0.90 | 1.50 | 1.50 | 153 | 4.30 |
| 6205 6304 |
P51535506 | 51.5 | 35.5 | 0.60 | 0.90 | 1.50 | 1.50 | 135 | 4.80 |
| 6006 | P54540506 | 54.5 | 40.5 | 0.60 | 0.90 | 1.50 | 1.50 | 141 | 4.60 |
| 6007 6206 6305 |
P61540507 | 61.5 | 40.5 | 0.70 | 1.10 | 1.80 | 1.57 | 176 | 8.70 |
| 6008 | P67550507 | 67.5 | 50.5 | 0.70 | 1.00 | 1.70 | 1.43 | 161 | 8.10 |
| 6306 | P71545507 | 71.5 | 45.5 | 0.70 | 1.40 | 2.10 | 2.00 | 185 | 12.0 |
| 6207 | P7155057 | 71.5 | 50.5 | 0.70 | 1.40 | 2.10 | 2.00 | 218 | 10.0 |
| 6009 | P74555508 | 74.5 | 55.5 | 0.80 | 1.10 | 1.90 | 1.38 | 211 | 11.0 |
| 6307 | P79550508 | 79.5 | 50.5 | 0.80 | 1.50 | 2.30 | 1.88 | 227 | 17.0 |
| 6010 6208 |
P79555508 | 79.5 | 55.5 | 0.80 | 1.50 | 2.30 | 1.88 | 263 | 15.0 |
| 6209 | P84560509 | 84.5 | 60.5 | 0.90 | 1.60 | 2.50 | 1.78 | 359 | 18.0 |
| 6308 | P89560509 | 89.5 | 60.5 | 0.90 | 1.60 | 2.50 | 1.78 | 288 | 23.0 |
| 6011 6210 |
P89565509 | 89.5 | 65.5 | 0.90 | 1.60 | 2.50 | 1.78 | 335 | 19.0 |
| 6012 | P9457551 | 94.5 | 75.5 | 1.00 | 1.20 | 2.20 | 1.20 | 325 | 19.0 |
| 6309 | P996551 | 99.0 | 65.5 | 1.00 | 1.60 | 2.60 | 1.60 | 292 | 32.0 |
| 6013 6211 |
P997051 | 99.0 | 70.5 | 1.00 | 1.60 | 2.60 | 1.60 | 332 | 28.0 |
| 6310 | P109705125 | 109.0 | 70.5 | 1.25 | 1.45 | 2.70 | 1.16 | 357 | 50.0 |
| 6014 6212 |
P109755125 | 109.0 | 75.5 | 1.25 | 1.45 | 2.70 | 1.16 | 398 | 45.0 |
| 6015 | P114905125 | 114.0 | 90.5 | 1.25 | 1.20 | 2.45 | 0.96 | 398 | 35.0 |
| 6311 | P119755125 | 119.0 | 75.5 | 1.25 | 1.55 | 2.80 | 1.24 | 320 | 61.0 |
| 6213 | P119855125 | 119.0 | 85.5 | 1.25 | 1.55 | 2.80 | 1.24 | 392 | 50.0 |
| 6016 6214 |
P124905125 | 124.0 | 90.5 | 1.25 | 1.75 | 3.00 | 1.40 | 445 | 52.0 |
| 6312 | P129855125 | 129.0 | 85.5 | 1.25 | 1.95 | 3.20 | 1.56 | 405 | 68.0 |
| 6017 6215 |
P129955125 | 129.0 | 95.5 | 1.25 | 1.95 | 3.20 | 1.56 | 500 | 54.0 |
| 6313 | P139905125 | 139.0 | 90.5 | 1.25 | 2.00 | 3.25 | 1.60 | 353 | 81.0 |
| 6018 6216 |
P139101125 | 139.0 | 101.0 | 1.25 | 2.00 | 3.25 | 1.60 | 429 | 66.0 |
| 6134 | P14995515 | 149.0 | 95.5 | 1.50 | 1.70 | 3.20 | 1.13 | 379 | 114.0 |
| 6020 6217 |
P14910165 | 149.0 | 106.0 | 1.50 | 1.70 | 3.20 | 1.13 | 450 | 95.0 |
| 6315 | P15910115 | 159.0 | 101.0 | 1.50 | 2.00 | 3.50 | 1.33 | 412 | 131 |
| 6021 6218 |
P15911115 | 159.0 | 111.0 | 1.50 | 2.00 | 3.50 | 1.33 | 477 | 113 |
| 6316 | P16911115 | 169.0 | 111.0 | 1.50 | 2.30 | 3.80 | 1.53 | 470 | 141 |
| 6022 6219 |
P16912115 | 169.0 | 121.0 | 1.50 | 2.30 | 3.80 | 1.53 | 546 | 121 |
| 6317 | P1791212 | 179.0 | 121.0 | 2.00 | 2.20 | 4.20 | 1.10 | 864 | 202 |
| 6024 6220 |
P1791262 | 179.0 | 126.0 | 2.00 | 2.20 | 4.20 | 1.10 | 928 | 187 |
| 6318 | P1891212 | 189.0 | 121.0 | 2.00 | 2.30 | 4.30 | 1.15 | 758 | 244 |
| 6221 | P1891312 | 189.0 | 131.0 | 2.00 | 2.30 | 4.30 | 1.15 | 858 | 215 |
| 6319 | P1981312 | 198.0 | 131.0 | 2.00 | 2.50 | 4.50 | 1.25 | 811 | 256 |
| 6026 6222 |
P1981412 | 198.0 | 141.0 | 2.00 | 2.50 | 4.50 | 1.25 | 922 | 224 |
| 6224 6320 |
P213151225 | 213.0 | 151.0 | 2.25 | 2.25 | 4.50 | 1.00 | 941 | 294 |
| 6030 6321 |
P223161225 | 223.0 | 161.0 | 2.25 | 2.35 | 4.60 | 1.04 | 942 | 310 |
| 6226 | P228161225 | 228.0 | 161.0 | 2.25 | 2.70 | 4.95 | 1.20 | 1036 | 340 |
| 6032 6322 |
P238161225 | 238.0 | 161.0 | 2.25 | 3.00 | 5.25 | 1.33 | 1020 | 401 |
| 6228 | P24817125 | 248.0 | 171.0 | 2.50 | 2.50 | 5.00 | 1.00 | 1004 | 467 |
| 6034 6324 |
P25817125 | 258.0 | 171.0 | 2.50 | 3.00 | 5.50 | 1.20 | 1106 | 541 |
| 6230 | P26818125 | 268.0 | 181.0 | 2.50 | 3.20 | 5.70 | 1.28 | 1154 | 566.0 |
| 6036 6326 |
P27818125 | 278.0 | 181.0 | 2.50 | 3.50 | 6.00 | 1.40 | 1154 | 645.0 |
| 6038 6232 |
P288191275 | 288.0 | 191.0 | 2.75 | 3.00 | 5.75 | 1.09 | 1145 | 741.0 |
| 6328 | P298191275 | 298.0 | 191.0 | 2.75 | 3.60 | 6.35 | 1.31 | 1306 | 834.0 |
| 6040 6234 |
P3082023 | 308.0 | 202.0 | 3.00 | 3.10 | 6.10 | 1.03 | 1299 | 940.0 |
| 6236 6330 |
P3182123 | 318.0 | 212.0 | 3.00 | 3.20 | 6.20 | 1.07 | 1301 | 977.0 |
| 6044 6238 6332 |
P3382323 | 338.0 | 232.0 | 3.00 | 3.60 | 6.60 | 1.20 | 1414 | 1050.0 |
| 6048 6240 6334 |
P3582423 | 358.0 | 242.0 | 3.00 | 4.00 | 7.00 | 1.33 | 1424 | 1210.0 |
Please note: measurements are in millimeters & weight in kilograms.
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