Timing belt drive

Design of the Uhing® timing belt drive


List of contents:

  1. Side thrust
  2. Drive torque
  3. Order specifications


Formulae and units used

F (N) = required side thrust
Fx1) (N) = side thrust of the timing belt drive
m (kg) = total mass to be moved
a (m/sec2) = acceleration
FR (N) = frictional loss
Si = safety factor 1.2 ... 2
g (m/sec2) = acceleration due to gravity (9.81 m/sec2)
mN (kg) = payload
mS1) (kg) = own mass of the carriage
Md (Nm) = required drive torque
d01) (kg) = effective belt pulley diameter
M01) (kg) = idling torque
1) Value to be taken from the technical data


1. Side thrust

The timing belt drive to be selected must have a maximum permissible side thrust which is greater than the calculated value.

F < FX

If the available side thrust is too low, either a larger timing belt drive must be selected or the acceleration or deceleration time must be increased.

Horizontal application:
F = (m ·a + FR)·Si

Vertical application:
F =( m·a+ FR + m·g)·Si

m = mS + mN

FR = m · g · coefficient of friction1)

No safety allowance is made for a possible belt rupture in vertical installations. The load can drop in an uncontrolled manner. Danger of injuries!

2. Drive torque


3. Order specifications

LGes = stroke + width of carriage + end frames + safety allowance.
Stroke = max. working range.
Max. travel = stroke + safety allowance (standard = 20 mm, different lengths on request of the customer).

The required braking or acceleration distances are a part of the stroke.


Ask for our offers for the timing belt drive


Joachim Uhing GmbH & Co. KG
Konrad-Zuse-Ring 20
24220 Flintbek, Germany

Tel. / Phone +49 (0) 4347 906-0
Fax Vertrieb +49 (0) 4347 906-40
Fax Einkauf +49 (0) 4347 906-31

E-mail: sales@uhing.com
Internet: www.uhing.com