HERTZIAN PRESSURE

standard combined roller bearing

 

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

 

Catalogue

 

calculating moment for bearings

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 data sheet EC053 52.5 164.96 14 7.33 S355J0 5500 1680
4.054 data sheet 2890 62.5 196.38 15 9.35 S450J2 8200 3100
4.055 data sheet 2867
3018
70.1 220.25 16 11.19 S450J2 9800 3730
4.056 data sheet 2810 77.7 244.13 16 12.4 S450J2 10900 3870
4.057 data sheet 3019 77.7 244.13 16 12.4 S450J2 10900 2970
4.058 data sheet 2811
3020
88.4 277.75 21 18.52 S450J2 16300 6760
4.059 data sheet 2912 101.2 317.97 18 18.17 S450J2 16000 5150
4.060 data sheet 3100 107.7 338.39 21 22.56 S450J2 19800 5490
4.061 data sheet 2862 107.7 338.39 21 22.56 S450J2 19800 7160
4.062 data sheet 2891
3353
123 386.47 26 31.90 S450J2 28000 10200
4.063 data sheet 2757 149 468.16 36 53.51 S450J2 47000 17800
4.089 data sheet FC165
FM165
165 518.36 35 56.24 S355 42180 13910
4.090 data sheet FC190
FM190
190 596.90 43 79.57 S355 59677 19400
4.091 data sheet FC220
FM220
220 691.15 53 113.56 S355 85170 28000
4.092 data sheet FC250
FM250
250 785.40 55 133.91 S355 100432 33900
4.093 data sheet FC280
FM280
280 879.65 67 182.70 S355 137027 46500
4.094 data sheet FC320 320 1005 77 239.97 S355 179975  
4.095 data sheet FC340 340 1068 81 268.21 S355 201150  
4.096 data sheet FC390 390 1125 111.5 423.50 S355 317600  

 

All dimensions are in mm and areas are in mm2. Loads are in Newtons.

 

Related Products and Links

Standard combined roller bearings
Eccentric adjustable combi bearings
Standard channels (rails / steel profiles) for standard, eccentric and shim adjustable bearings
Flanged clamps for fixing channels
Jumbo combined bearings
Jumbo C section rail
Technical data for combined roller bearings and steel profiles
Application Examples for combined roller bearings and steel profiles