HERTZIAN PRESSURE
The Hertzian pressure must not exceed the tensile strength of the mating steel profile in order to avoid depressions in the profile. By ensuring that the maximum pressure is less than 750N/mm2 for S355 steel & 900N/mm2 for S450J2 steel, such depressions should be prevented. The following table shows the approximate maximum static force on each bearing based on 0.31% of the bearing's surface area being in contact with the channel at any moment in time.
First calculate the bearing loads using the Moment-Balance Calculations. Once you have determined these loads, select the bearing size from the chart below.
You can follow a link to the relevent product page or download the product datasheet from the table below. The datasheet shows the bearings, plates, rails and clamps available for that particular size. You can also download the Hertzian Pressure table (pdf) or our full Combined Roller Bearings catalogue.
If you need help with any of these calculations, call Kate or Matt (01908 511733) or email a drawing to: sales@euro-bearings.com
Calculate the bearing loads using the Moment-Balance Calculations
| Part Number | Data Sheet | Profile | Diameter | Circumference | Contact Width | Approx Contact Area | Steel Grade for steel profiles | Maximum Static Force between RADIAL roller & rail (N) | Maximum Static Force between AXIAL roller & rail (N) |
|---|---|---|---|---|---|---|---|---|---|
| 4.053 |  |
EC053 | 52.5 | 164.96 | 14 | 7.33 | S355J0 | 5500 | 1680 |
| 4.054 |  |
2890 | 62.5 | 196.38 | 15 | 9.35 | S450J2 | 8200 | 3100 |
| 4.055 | |
2867 3018 |
70.1 | 220.25 | 16 | 11.19 | S450J2 | 9800 | 3730 |
| 4.056 | |
2810 | 77.7 | 244.13 | 16 | 12.4 | S450J2 | 10900 | 3870 |
| 4.057 | |
3019 | 77.7 | 244.13 | 16 | 12.4 | S450J2 | 10900 | 2970 |
| 4.058 | |
2811 3020 |
88.4 | 277.75 | 21 | 18.52 | S450J2 | 16300 | 6760 |
| 4.059 | |
2912 | 101.2 | 317.97 | 18 | 18.17 | S450J2 | 16000 | 5150 |
| 4.060 | |
3100 | 107.7 | 338.39 | 21 | 22.56 | S450J2 | 19800 | 5490 |
| 4.061 | |
2862 | 107.7 | 338.39 | 21 | 22.56 | S450J2 | 19800 | 7160 |
| 4.062 | |
2891 3353 |
123 | 386.47 | 26 | 31.90 | S450J2 | 28000 | 10200 |
| 4.063 | |
2757 | 149 | 468.16 | 36 | 53.51 | S450J2 | 47000 | 17800 |
| 4.089 | |
FC165 FM165 |
165 | 518.36 | 35 | 56.24 | S355 | 42180 | 13910 |
| 4.090 | |
FC190 FM190 |
190 | 596.90 | 43 | 79.57 | S355 | 59677 | 19400 |
| 4.091 | |
FC220 FM220 |
220 | 691.15 | 53 | 113.56 | S355 | 85170 | 28000 |
| 4.092 | |
FC250 FM250 |
250 | 785.40 | 55 | 133.91 | S355 | 100432 | 33900 |
| 4.093 | |
FC280 FM280 |
280 | 879.65 | 67 | 182.70 | S355 | 137027 | 46500 |
| 4.094 | |
FC320 | 320 | 1005 | 77 | 239.97 | S355 | 179975 | |
| 4.095 | |
FC340 | 340 | 1068 | 81 | 268.21 | S355 | 201150 | |
| 4.096 | |
FC390 | 390 | 1125 | 111.5 | 423.50 | S355 | 317600 |
All dimensions are in mm and areas are in mm2. Loads are in Newtons.
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