Working Principle
The most critical function of the MB lock washer is to prevent KM lock nuts from loosening due to vibration, shock loads, or rotational forces. This maintains the precise axial position of the bearing on the shaft, ensuring the machine operates with stability and safety.
The MB lock washer is placed onto the shaft or adapter sleeve prior to assembly. The internal tab (or key) of the washer seats into the keyway on the shaft or sleeve, effectively preventing the washer itself from rotating.
Then the KM lock nut is tightened. This action pushes the bearing onto the tapered surface of the shaft or sleeve.
Once the nut reaches the correct torque, one of the outer tabs of the washer is bent into one of the slots around the circumference of the nut to lock it. This bent tab physically prevents the nut from rotating backward.
High Durability
Steel used in production and long-lasting use.
Perfect Fit / Full Compatibility
Compatibility with different shaft and bearing sizes.
Easy Installation
Quick Installation with Standard KM Nut and MB Washer.
Quality Control
Tested and reliable products at every stage.
| d | d1 | d2 | B | f | M | Designations | Mass |
|---|---|---|---|---|---|---|---|
| mm | mm | mm | mm | mm | mm | kg | |
| 10 | 13,5 | 21 | 1 | 3 | 8,5 | MB 0 | 0,001 |
| 12 | 17 | 25 | 1 | 3 | 10,5 | MB 1 | 0,002 |
| 15 | 21 | 28 | 1 | 4 | 13,5 | MB 2 | 0,003 |
| 17 | 24 | 32 | 1 | 4 | 15,5 | MB 3 | 0,003 |
| 20 | 26 | 36 | 1 | 4 | 18,5 | MB 4 | 0,004 |
| 25 | 32 | 42 | 1,25 | 5 | 23 | MB 5 | 0,006 |
| 30 | 38 | 49 | 1,25 | 5 | 27,5 | MB 6 | 0,008 |
| 35 | 44 | 57 | 1,25 | 6 | 32,5 | MB 7 | 0,011 |
| 40 | 50 | 62 | 1,25 | 6 | 37,5 | MB 8 | 0,013 |
| 45 | 56 | 69 | 1,25 | 6 | 42,5 | MB 9 | 0,016 |
| 50 | 61 | 74 | 1,25 | 6 | 47,5 | MB 10 | 0,016 |
| 55 | 67 | 81 | 1,5 | 8 | 52,5 | MB 11 | 0,024 |
| 60 | 73 | 86 | 1,5 | 8 | 57,5 | MB 12 | 0,026 |
| 65 | 79 | 92 | 1,5 | 8 | 62,5 | MB 13 | 0,029 |
| 70 | 85 | 98 | 1,5 | 8 | 66,5 | MB 14 | 0,034 |
| 75 | 90 | 104 | 1,5 | 8 | 71,5 | MB 15 | 0,036 |
| 80 | 95 | 112 | 1,75 | 10 | 76,5 | MB 16 | 0,047 |
| 85 | 102 | 119 | 1,75 | 10 | 81,5 | MB 17 | 0,053 |
| 90 | 108 | 126 | 1,75 | 10 | 86,5 | MB 18 | 0,064 |
| 95 | 113 | 133 | 1,75 | 10 | 91,5 | MB 19 | 0,068 |
| 100 | 120 | 142 | 1,75 | 12 | 96,5 | MB 20 | 0,078 |
| 105 | 126 | 145 | 1,75 | 12 | 100,5 | MB 21 | 0,085 |
| 110 | 133 | 154 | 1,75 | 12 | 105,5 | MB 22 | 0,096 |
| 115 | 137 | 159 | 2 | 12 | 110,5 | MB 23 | 0,11 |
| 120 | 135 | 152 | 2 | 14 | 115 | MBL 24 | 0,049 |
| 138 | 164 | 2 | 14 | 115 | MB 24 | 0,11 | |
| 125 | 148 | 170 | 2 | 14 | 120 | MB 25 | 0,12 |
| 130 | 145 | 161 | 2 | 14 | 125 | MBL 26 | 0,077 |
| 149 | 175 | 2 | 14 | 125 | MB 26 | 0,120 | |
| 135 | 160 | 185 | 2 | 14 | 130 | MB 27 | 0,14 |
| 140 | 155 | 172 | 2 | 16 | 135 | MBL 28 | 0,080 |
| 160 | 192 | 2 | 16 | 135 | MB 28 | 0,150 | |
| 145 | 172 | 202 | 2 | 16 | 140 | MB 29 | 0,160 |
| 150 | 170 | 189 | 2 | 16 | 145 | MBL 30 | 0,110 |
| 171 | 205 | 2 | 16 | 145 | MB 30 | 0,160 | |
| 155 | 182 | 212 | 2,5 | 16 | 147,5 | MB 31 | 0,233 |
| 160 | 180 | 199 | 2,5 | 18 | 154 | MBL 32 | 0,150 |
| 182 | 217 | 2,5 | 18 | 154 | MB 32 | 0,219 | |
| 165 | 193 | 222 | 2,5 | 18 | 157,5 | MB 33 | 0,262 |
| 170 | 190 | 211 | 2,5 | 18 | 164 | MBL 34 | 0,170 |
| 193 | 232 | 2,5 | 18 | 164 | MB 34 | 0,250 | |
| 180 | 200 | 222 | 2,5 | 20 | 174 | MBL 36 | 0,185 |
| 203 | 242 | 2,5 | 20 | 174 | MB 36 | 0,282 | |
| 190 | 210 | 232 | 2,5 | 20 | 184 | MBL 38 | 0,200 |
| 214 | 252 | 2,5 | 20 | 184 | MB 38 | 0,260 | |
| 200 | 222 | 245 | 2,5 | 20 | 194 | MBL 40 | 0,295 |
| 226 | 262 | 2,5 | 20 | 194 | MB 40 | 0,310 | |
| 220 | 250 | 292 | 3 | 24 | 213 | MB 44 | 0,460 |
| 240 | 270 | 312 | 3 | 24 | 233 | MB 48 | 0,640 |
| 260 | 300 | 342 | 3 | 28 | 253 | MB 52 | 0,760 |
| 280 | 320 | 362 | 3 | 28 | 273 | MB 56 | 0,820 |
| B | M | M1 | M2 | M3 | Mass | Designations | headed bolt | lock nut | lock nut |
|---|---|---|---|---|---|---|---|---|---|
| mm | mm | mm | mm | mm | kg | ||||
| 20 | 12 | 4 | 13,5 | 7 | 0,02 | MS 3044 | M6x12 | HM 3044 | - |
| 20 | 12 | 4 | 22,5 | 9 | 0,03 | MS 3144 | M8X16 | HM 3144 | HM 3148 |
| 20 | 12 | 4 | 17,5 | 9 | 0,03 | MS 3052-48 | M8x16 | HM 3048 | HM 3052 |
| 24 | 12 | 4 | 25,5 | 12 | 0,035 | MS 3152 | M10x20 | HM 3152 | HM 3156 |
| 24 | 12 | 4 | 17,5 | 9 | 0,030 | MS 3056 | M8x16 | HM 3056 | |
| 24 | 12 | 4 | 20,5 | 9 | 0,033 | MS 3060 | M8x16 | HM 3060 | - |
| 24 | 12 | 4 | 30,5 | 12 | 0,040 | MS 3160 | M10x20 | HM 3160 | - |
| 24 | 15 | 5 | 21 | 9 | 0,046 | MS 3068-64 | M8x16 | HM 3064 | HM 3068 |
| 24 | 15 | 5 | 31 | 12 | 0,055 | MS 3164 | M10x20 | HM 3164 | - |
| 28 | 15 | 5 | 20 | 9 | 0,051 | MS 3072 | M8x16 | HM 3072 | - |
| 28 | 15 | 5 | 24 | 12 | 0,055 | MS 3080-76 | M10x20 | HM 3076 | HM 3080 |
| 28 | 15 | 5 | 38 | 14 | 0,069 | MS 3172-68 | M12x25 | HM 3168 | HM 3172 |
| 32 | 15 | 5 | 24 | 12 | 0,063 | MS 3084 | M10x20 | HM 3084 | - |
| 32 | 15 | 5 | 28 | 14 | 0,067 | MS 3092-88 | M12x25 | HM 3088 | HM 3092 |
| 32 | 15 | 5 | 40 | 14 | 0,083 | MS 3176 | M12x25 | HM 3176 | - |
| 32 | 15 | 5 | 45 | 18 | 0,089 | MS 3184-80 | M16x30 | HM 3180 | HM 3184 |
| 36 | 15 | 5 | 28 | 14 | 0,076 | MS 30/500-96 | M12x25 | HM 3096 | HM 30/500 |
| 36 | 15 | 5 | 43 | 18 | 0,097 | MS 3192-88 | M16x30 | HM 3188 | HM 3192 |
| 36 | 15 | 5 | 53 | 18 | 0,11 | MS 3196 | M16x30 | HM 3196 | - |
| 40 | 15 | 5 | 45 | 18 | 0,11 | MS 31/500 | M16x30 | HM 31/500 | - |
| 40 | 21 | 7 | 29 | 18 | 0,15 | MS 30/560 | M16x30 | HM 30/560 | - |
| 40 | 21 | 7 | 34 | 18 | 0,14 | MS 30/600-530 | M16x30 | HM 30/530 | HM 30/600 |
| 40 | 21 | 7 | 51 | 22 | 0,19 | MS 31/530 | M20x40 | HM 31/530 | - |
| 45 | 21 | 7 | 34 | 18 | 0,17 | MS 30/630 | M16x30 | HM 30/630 | - |
| 45 | 21 | 7 | 39 | 18 | 0,19 | MS 30/670 | M16x30 | HM 30/670 | - |
| 45 | 21 | 7 | 54 | 22 | 0,22 | MS 31/600-560 | M20x40 | HM 31/560 | HM 31/600 |
| 50 | 21 | 7 | 39 | 18 | 0,21 | MS 30/710 | M16x30 | HM 30/710 | - |
| 50 | 21 | 7 | 61 | 22 | 0,27 | MS 31/630 | M20x40 | HM 31/630 | |
| 50 | 21 | 7 | 66 | 22 | 0,28 | MS 31/670 | M20x40 | HM 31/670 | - |
| 55 | 21 | 7 | 39 | 18 | 0,23 | MS 30/800-750 | M16x30 | HM 30/750 | HM 30/800 |
| 55 | 21 | 7 | 69 | 26 | 0,32 | MS 31/710 | M24x50 | HM 31/710 | - |
| 60 | 21 | 7 | 44 | 22 | 0,26 | MS 30/900-850 | M20x40 | HM 30/850 | HM 30/900 |
| 60 | 21 | 7 | 46 | 22 | 0,28 | MS 30/950 | M20x40 | HM 30/950 | - |
| 60 | 21 | 7 | 51 | 22 | 0,30 | MS 30/1000 | M20x40 | HM 30/1000 | HM 30/1060 |
| 60 | 21 | 7 | 70 | 26 | 0,35 | MS 31/800-750 | M24x50 | HM 31/750 | HM 31/800 |
| 70 | 21 | 7 | 76 | 26 | 0,60 | MS 31/900 | M24x50 | HM 31/900 | |
| 70 | 21 | 7 | 71 | 26 | 0,41 | MS 31/850 | M24x50 | HM 31/850 | - |
| 70 | 21 | 7 | 78 | 26 | 0,43 | MS 31/950 | M24x50 | HM 31/950 | - |
| 70 | 21 | 7 | 88 | 26 | 0,45 | MS 31/1000 | M24x50 | HM 31/1000 | HM 31/1060 |
| 70 | 21 | 7 | 88 | 26 | 0,74 | MS 31/1060 | M24X45 | HM 31/1060 | |
| 60 | 21 | 7 | 51 | 22 | 0,45 | MS 30/1120 | M20x40 | HM 30/1120 | |
| 70 | 21 | 7 | 88 | 26 | 0,74 | MS 31/1120 | M24x45 | HM 31/1120 | |
| 60 | 21 | 7 | 51 | 22 | 0,45 | MS 30/1180 | M20x40 | HM 30/1180 | |
| 70 | 21 | 7 | 88 | 26 | 0,74 | MS 31/1180 | M24x45 | HM 31/1180 | |
| 60 | 21 | 7 | 51 | 22 | 0,45 | MS 30/1250 | M20x40 | HM 30/1250 | |
| 70 | 21 | 7 | 88 | 26 | 0,74 | MS 31/1250 | M24x45 | HM 31/1250 | |
| 60 | 21 | 7 | 51 | 22 | 0,45 | MS 30/1320 | M20x40 | HM 30/1320 | |
| 70 | 21 | 7 | 88 | 26 | 0,74 | MS 31/1320 | M24x45 | HM 31/1320 | |
| 60 | 21 | 7 | 51 | 22 | 0,45 | MS 30/1400 | M20x40 | HM 30/1400 | |
| 70 | 21 | 7 | 88 | 26 | 0,74 | MS 31/1400 | M24x45 | HM 31/1400 | |
| 60 | 21 | 7 | 56 | 22 | 0,47 | MS 30/1500 | M20x40 | HM 30/1500 | |
| 70 | 21 | 7 | 88 | 26 | 0,74 | MS 31/1500 | M24x45 | HM 31/1500 |
| d | d1 | d2 | B | f | M | Designations | Mass |
|---|---|---|---|---|---|---|---|
| mm | mm | mm | mm | mm | mm | kg | |
| 12 | 17 | 25 | 1,2 | 3 | 10,5 | MB-1 A | 0,003 |
| 15 | 21 | 28 | 1,2 | 4 | 13,5 | MB-2 A | 0,004 |
| 17 | 24 | 32 | 1,2 | 4 | 15,5 | MB-3 A | 0,004 |
| 20 | 26 | 36 | 1,2 | 4 | 18,5 | MB-4 A | 0,005 |
| 25 | 32 | 42 | 1,8 | 5 | 23 | MB-5 A | 0,009 |
| 30 | 38 | 49 | 1,8 | 5 | 27,5 | MB-6 A | 0,011 |
| 35 | 44 | 57 | 1,8 | 6 | 32,5 | MB-7 A | 0,015 |
| 40 | 50 | 62 | 1,8 | 6 | 37,5 | MB-8 A | 0,018 |
| 45 | 56 | 69 | 1,8 | 6 | 42,5 | MB-9 A | 0,021 |
| 50 | 61 | 74 | 1,8 | 6 | 47,5 | MB-10 A | 0,023 |
| 55 | 67 | 81 | 2,5 | 8 | 52,5 | MB-11 A | 0,036 |
| 60 | 73 | 86 | 2,5 | 8 | 57,5 | MB-12 A | 0,040 |
| 65 | 79 | 92 | 2,5 | 8 | 62,5 | MB-13 A | 0,050 |
| 70 | 85 | 98 | 2,5 | 8 | 66,5 | MB-14 A | 0,053 |
| 75 | 90 | 104 | 2,5 | 8 | 71,5 | MB-15 A | 0,058 |
| 80 | 95 | 112 | 2,5 | 10 | 76,5 | MB-16 A | 0,066 |
| 85 | 102 | 119 | 2,5 | 10 | 81,5 | MB-17 A | 0,076 |
| 90 | 108 | 126 | 2,5 | 10 | 86,5 | MB-18 A | 0,087 |
| 95 | 113 | 133 | 2,5 | 10 | 91,5 | MB-19 A | 0,094 |
| 100 | 120 | 143 | 2,5 | 12 | 96,5 | MB-20 A | 0,110 |
| d | d1 | d2 | B | f | M | V | Designations | Mass |
|---|---|---|---|---|---|---|---|---|
| mm | mm | mm | mm | mm | mm | kg | ||
| 0.406 | 0,655 | 0.875 | 0.032 | 0.120 | 0.334 | 0.062 | W-00 | 0,002 |
| 0.484 | 0.719 | 1.016 | 0.033 | 0.120 | 0.412 | 0.062 | W-01 | 0,002 |
| 0.601 | 0.813 | 1.156 | 0.034 | 0.120 | 0.529 | 0.062 | W-02 | 0,003 |
| 0.679 | 0.938 | 1.328 | 0.035 | 0.120 | 0.607 | 0.062 | W-03 | 0,005 |
| 0.801 | 1.125 | 1.531 | 0.036 | 0.176 | 0.729 | 0.062 | W-04 | 0,007 |
| 0.989 | 1.281 | 1.719 | 0.040 | 0.176 | 0.909 | 0.094 | W-05 | 0,008 |
| 1.193 | 1.500 | 1.922 | 0.040 | 0.176 | 1.093 | 0.094 | W-06 | 0,008 |
| 1.396 | 1.813 | 2.250 | 0.040 | 0.176 | 1.296 | 0.094 | W-07 | 0,014 |
| 1.583 | 2.000 | 2.469 | 0.048 | 0.290 | 1.475 | 0.094 | W-08 | 0,019 |
| 1.792 | 2.281 | 2.734 | 0.048 | 0.290 | 1.684 | 0.125 | W-09 | 0,021 |
| 1.992 | 2.438 | 2.922 | 0.048 | 0.290 | 1.884 | 0.125 | W-10 | 0,02 |
| 2.182 | 2.656 | 3.109 | 0.053 | 0.290 | 2.069 | 0.125 | W-11 | 0,022 |
| 2.400 | 2.844 | 3.344 | 0.053 | 0.290 | 2.267 | 0.125 | W-12 | 0,025 |
| 2.588 | 3.063 | 3.578 | 0.053 | 0.290 | 2.455 | 0.125 | W-13 | 0,027 |
| 2.791 | 3.313 | 3.828 | 0.053 | 0.290 | 2.658 | 0.188 | W-14 | 0,032 |
| 2.973 | 3.563 | 4.109 | 0.062 | 0.290 | 2.831 | 0.188 | W-15 | 0,048 |
| 3.177 | 3.844 | 4.375 | 0.062 | 0.353 | 3.035 | 0.188 | W-16 | 0,053 |
| 3.395 | 4.031 | 4.625 | 0.062 | 0.353 | 3.253 | 0.188 | W-17 | 0,057 |
| 3.582 | 4.281 | 4.938 | 0.084 | 0.353 | 3.418 | 0.188 | W-18 | 0,07 |
| 3.800 | 4.563 | 5.219 | 0.084 | 0.353 | 3.636 | 0.188 | W-19 | 0,082 |
| 3.988 | 4.813 | 5.500 | 0.084 | 0.353 | 3.809 | 0.250 | W-20 | 0,092 |
| 4.192 | 5.000 | 5.703 | 0.084 | 0.353 | 4.013 | 0.250 | W-21 | 0,1 |
| 4.395 | 4.921 | 5.688 | 0.115 | 0.350 | 4.185 | W-022 | 0,094 | |
| 4.395 | 5.281 | 6.063 | 0.115 | 0.353 | 4.185 | 0.250 | W-22 | 0,16 |
| 4.801 | 5.333 | 6.188 | 0.115 | 0.350 | 4.591 | W-024 | 0,11 | |
| 4.801 | 5.688 | 6.469 | 0.115 | 0.353 | 4.591 | 0.250 | W-24 | 0,17 |
| 5.191 | 5.723 | 6.625 | 0.115 | 0.469 | 4.961 | W-026 | 0,13 | |
| 5.191 | 6.188 | 7.031 | 0.115 | 0.435 | 4.961 | 0.250 | W-26 | 0,22 |
| 5.582 | 6.129 | 7.094 | 0.115 | 0.594 | 5.352 | W-028 | 0,16 | |
| 5.582 | 6.531 | 7.438 | 0.115 | 0.590 | 5.352 | 0.250 | W-28 | 0,22 |
| 5.983 | 6.708 | 7.719 | 0.115 | 0.594 | 5.722 | W-030 | 0,19 | |
| 5.983 | 7.063 | 8.063 | 0.146 | 0.590 | 5.722 | 0.313 | W-30 | 0,33 |
| 6.389 | 7.114 | 8.156 | 0.115 | 0.594 | 6.128 | W-032 | 0,2 | |
| 6.389 | 7.438 | 8.438 | 0.146 | 0.590 | 6.128 | 0.313 | W-32 | 0,34 |
| 6.764 | 7.508 | 8.594 | 0.115 | 0.719 | 6.503 | W-034 | 0,23 | |
| 6.764 | 8.031 | 9.063 | 0.146 | 0.715 | 6.503 | 0.313 | W-34 | 0,42 |
| 7.171 | 7.899 | 9.000 | 0.115 | 0.719 | 6.910 | W-036 | 0,24 | |
| 7.171 | 8.375 | 9.438 | 0.146 | 0.715 | 6.910 | 0.313 | W-36 | 0,43 |
| 7.577 | 8.290 | 9.438 | 0.115 | 0.719 | 7.316 | W-038 | 0,24 | |
| 7.577 | 8.781 | 9.875 | 0.146 | 0.715 | 7.316 | 0.313 | W-38 | 0,46 |
| 7.982 | 8.774 | 9.969 | 0.115 | 0.844 | 7.721 | W-040 | 0,29 | |
| 7.982 | 9.156 | 10.313 | 0.146 | 0.840 | 7.721 | 0.313 | W-40 | 0,47 |
| 8.701 | 9.570 | 10.406 | 0.115 | 0.945 | 8.327 | W-044 | 0,3 | |
| 8.701 | 9.875 | 11.438 | 0.146 | 0.940 | 8.327 | W-44 | 0,6 |
High Quality Standards
At every stage of our production process, we implement rigorous quality control procedures. All steps, from material selection to final inspection, are carried out in accordance with international standards. Thus, we offer long-lasting, durable, and reliable products.
On-Time Delivery
To ensure there are no disruptions in our customers' projects, we meticulously plan our production and shipment processes. We support your business continuity by delivering your orders securely and swiftly on the scheduled dates.
Competitive Pricing Policy
We offer solutions at competitive prices without compromising on quality. We help you protect both your budget and productivity by providing sustainable price advantages in long-term partnerships.