Linear Line EN

5 Technical instructions

Friction / displacement resistance Mono Rail profile rails have a low friction characteristic and thus low dis placement resistance. The low start-up friction (breakaway force) is al most identical to the moving friction (running resistance). The displacement resistance is dependent upon several factors: ■ Friction of the sealing system ■ Friction of the balls with each other ■ Friction between balls and redirection ■ Rolling resistance of the balls in the running grooves ■ Resistance of lubricant in the carriage ■ Resistance by contamination in the lubricant ■ Preload for increase of rigidity ■ Moment load

Resistance of the seals

0.015

Type

f [N]

0.010

MRS15

0.15

MRS20

0.2

MRS25

0.35

0.005

MRS30

0.7

Coefficient of friction (µ)

MRS35

0.8

MRS45

0.9

0

0.1

0.2

Loading ratio: (P/C) P: Loading C: Dynamic load capacities

MCS55

1.0

Tab. 34

Fig. 43

Displacement resistance The following formula is used for general approximate calculation of the displacement resistance. Please note that the level of preload or the visco sity of the lubricant used can also influence the displacement resistance.

F m = Displacement resistance (N) F = Load (N) µ = Coefficient of friction f = Resistance of the seals (N)

F m = µ · F + f

Fig. 44

Mono Rail profile rails have a coefficient of friction of approx. µ = 0.002 - 0.003.

MR-34