Linear Line EN

Speedy Rail

Loads on twin 4 'V' rollers trolleys

Trolley on double rail horizontal

CONCENTRIC ROLLERS

T (*) x

(*)

T x

Z

F x

Fz

ECCENTRIC ROLLERS

SIDE VIEW

(*)

(*)

T x

T x

F z

= =

X

F x

L

TOP VIEW

Fig. 166

(*) Traction force (chain or belt) T x = F x /2

When assembling lines with parallel rail and long strokes it would be wise to use axially-free roller assemblies on one of the rails in order to withstand minor misalignments due either to assembly or maintenance errors.

All 'F' values must include the dynamic component obtained by: Inertia Force = mass (kg) x acceleration (mt/s 2 ).

S R

Roller-guide load verification

F Rad => ––– + ————— F z 4 F x · Z + F z · X 2 · L

Fig. 167

Important : the load on most loaded rollers must be, for each roller type, less or equal to the corresponding rated load on the catalogue.

SR-73