WebCAP - Online Drive & Tension Calculation Software


Optibelt WebCAP is an easy-to-use online drive design and tension calculation tool. It can be used without the need to register and there is no software to install.
Click on the link above to go to the WebCAP site. 

WebCAP can be used for simple 2-pulley v-belt drives to design for optimal efficiency or to calculate proper tension values.

SOFTWARE CAP 6.0 / 6.5

Two-pulley calculation program



The optibelt CAP drive calculation program has been used for years worldwide for calculating and designing belt drives. The updated version CAP 6.0, with a new look, allows for quick and clear drive design and calculation.

Different options for calculation are available to the user:

  • CAP Standard: simple performance calculations for drives with V-belts, timing belts or ribbed belts
  • CAP Professional: detailed performance calculations in all variations with many details
  • Economic feasibility calculation: Option to compare existing drives to optimised drives  

The new CAP 6.5 calculation software for multi-pulley drives for timing belts is available now, see above.

Software download

CAP 6.0 for Windows 2000/XP/7/8/10
44 MB

For multi-pulley drives for timing belts



With this software, the user can design simple 2-pulley drives or calculate the correct timing belt for complicated multi-pulley drives. Whether standard, high performance, double section or ALPHA FLEX timing belts, nearly all common profiles can be calculated.

Those who already own the CAP6.0 software can use the same serial number for activation. Those who do not yet own CAP software can register on the Optibelt website.

Software download

CAP 6.5 for Windows 2000/XP/7/8/10
21 MB

U.S. (Imperial) Calculations for V-Belts (Single, Banded, Cogged, Ribbed)

Optibelt's free CAP drive calculation software is used to calculate various aspects of power transmission drives for v-belts, timing belts and ribbed belts. Software installs onto any Windows operating system 2000/XP/7. Software must me registered for extended use.


Optibelt CAP software can calculate the following: 

  • Performance & efficiency
  • Durability / Longevity
  • Cost savings
  • Compare existing and optimized drive performance 

Software download

optibelt CAP v10.1
46 MB

After successful registration, you can download optibelt CAP 6.0 and optibelt CAP 6.5 as full, licenced single-user versions.

User registration


If you experience issues running optibelt CAP after installation, please follow these instructions to resolve. If you need further assistance, simply send an e-mail to info[at]optibelt-usacom with the subject "CAP Software".

Drive Calculation Forms

Need a drive calculation performed, but don't want to install software?

Simply download the easy-to-use form, fill out the needed information and save it to your computer.
Then e-mail it to us at info[at]optibelt-usacom. A member of our sales staff will give you the results of your requested calculation! 

Drive Calculation Form
113 KB
Drive Calculation Form / Multi-Pulley
115 KB

Get in contact with us

Optibelt GmbH

Image trailer


Illinois (Headquarters)

1580 W. Stearns Rd.
Bartlett, IL 60103

Phone: 630-628-8400
E-mail: info[at]optibelt-usacom