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The history is cornerstone of the
present time as well as challenge to the future.

Single direction thrust ball bearings

51256M

375
280
min. 2.1
80
min. 2.1
284
380

339
2
2
321



Správné označení: 51256M

Radiální vůle: C
Přesnost: P
Stabilizace: S




Typ
Type
51256M
Konstrukce
Design
Single direction thrust ball bearings
Hlavní rozměry
Dimensions
d D d1 D1 H rs (min)
mm
280 380 375 284 80 2.1
Výkonové parametry
Performance parameters
Cr Cor Pu MFO-pl. maz. MFO - olej
kN min-1
483.100 58.100 560 750
Hmotnost
Mass
- [ kg ]
26.5
Připojovací rozměry
Mounting Dimensions
da (min) Da (max) ra (max)
339 321 2
Minimum axial load factor 30

 

 

Calculations

vzorec C = kN  
P = kN  
L10 = 106ot
vzorec Fa
Fr
  n=
 
L10h = h
  D=
 
L10km = 106km
vzorec   a23=
  a1=
Lna = 106ot

Bearing frequencies

rotational speed of the inner ring

ni [RPM] 

fi [Hz] 

rotational frequency of the inner ring

fc [Hz] 

rotational frequency of the rolling element and cage assembly

fr [Hz] 

rotational frequency of a rolling element about its own axis

fip [Hz] 

over-rolling frequency of one point on the inner ring

fep [Hz] 

over-rolling frequency of one point on the outer ring

frp [Hz] 

over-rolling frequency of one point on rolling element


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