Heavy-Line EN

HEAVY-LINE | Data sheet

■ Diagram b) Load F applied parallel to axis X

Y

Y

x F

F

y F

I y

X

Z

I x

Fig.25

■ Diagramma c) Load F applied parallel to axis X In this case the external load F₁, applied at the point of coordinate (y1; z1), should be considered together with reaction F 2 = -F 1 applied at the point of co-ordinate (y 2 ; z 2 ). Calling ∆y the absolute value of y 2 -y 1 and ∆z the absolute value of z 2 -z 1 , the following formula is used:

Y

Y

z 1

F 1

y 1

I y

Z

X

y 2

F 2

I x

z 2

Fig.26

■ Guide Roller Calculation In the table for each roller, the following data is specified:

□ C w basic dynamic load, it is the radial load (N) that can be applied to the guide roller gives 100 km nominal life. □ F r limit radial load, it is the maximum radial load (N) that can be applied on the guide roller; guide roller considering the strength of the stud. □ F a limit axial load, it is the maximum axial load (N) that can be applied on the guide roller; guide roller considering the strength of the stud. □ X and Y coefficients to define the equivalent load for bearing life. □ α is the contact angle dependent on the guide roller type.

Note: ISO 281 states ‘the nominal life will be exceeded by 90 % of bearings before the first sign of material fatigue’.

System life is the minimum life of either the bearings in the guide roller or the rail / roller contact surfaces.

For the rail / roller surface see the lubrication paragraph. For the bearings’ life proceed as follows.

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