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drylin® T - System design, horizontal, 1 rail and 2 carriages or 2 rails and 4 carriages

2st Step:

Check whether the clearances of the aggressive forces lie within the permitted values (see Maximum permitted clearances).

Maximum permitted clearances:

Option: 1 rail, 2 carriage
Option: 2 rails, 4 carriages
sy + sz < 2 wx - Y0
ay + az < 2 wx - Y0

3st Step:

Calculate the required driving power


Center of mass in x- and z-direction within the carriage(s)


Center of mass in z-direction outside the carriage(s)


Center of mass in x-direction outside the carriage(s)

In case the position of the center of mass cannot be classified:

4st Step:

Calculate the maximum bearing load


Maximum bearing load in y-direction


Maximum bearing load in z-direction

Variables in the calculation:

Fa: Driving power [lbs]
Fs: Mass force [lbs]
Fy, Fz: Bearing load in y- or z-direction [lbs]
sx, sy, sz: Clearance of the mass force
in x-, y- or z-direction
ay, az: Clearance of the driving power
in y- or z-direction
wx: Clearance of the carriage on a rail [mm]
LX: Constant based on the installation size [mm]
Zm: Constant based on the installation size [mm]
Y0: Constant based on the installation size [mm]
b: Clearance of the guide rails [mm]
µ: Coefficient of friction,
µ = 0 in static loads,
µ = 0.2 in dynamic loads
ZW: Number of carriages per rail  

The constant values:

Order no. LX ZM Y0
  [mm] [mm] [mm]
TW-01-15 29 16 11.5
TW-01-20 35 23 15.0
TW-01-25 41 25 19.0
TW-01-30 49 29 21.5


  1 rail,
2 carriages
2 rails,
3-4 carriages
K1 |(ay+Y0)/Wx| |(ay+Y0)/Wx|
K2 (sy+Y0)/Wx (sy+Y0)/Wx
K3 |az/Wx| |az/Wx|
K4 |sx/Wx| |sx/Wx|
K5 |sz/Wx| |sz/Wx|
K6 |(sy+Y0)/Zm| |(sy+Y0)/b|
K7 |sz/Zm| |(sz/b)-0,5|

5st Step:

Check the maximum bearing load of the most strongly stressed bearing with the calculated load in Step No. 4.

Maximum permitted load:

Order no. Fymax, Fzmax
TW-01-15 450
TW-01-20 830
TW-01-25 1125
TW-01-30 1575

6st Step:

Determination of the maximum permitted speed for the load in Step No. 4

Diagram for the determination of the maximum permitted speed for the determined bearing load