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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 steeel & 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.
Download the Hertzian Pressure table or full Combined Roller Bearings catalogue.

Bearing Part Number
Data
Sheet
(pdf)
Profile Part Number

Diameter
(mm)

Circumference (mm)
Contact Width (mm)
Approx. Contact Area (mm2)
Steel Grade for steel profiles Maximum Static Force between RADIAL roller & channel (N) Maximum Static Force between AXIAL roller & channel (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


Standard Combined Bearings standard cr bearing
Channel / Profile Data
Jumbo Bearings (4.089-4.096)
combined bearings catalogue