Design Flex® Pro™
Design Flex® Pro™ is Gates’ free drive design software that provides a quick, accurate and flexible method of correctly designing belt drives. The user-friendly software allows you to design a drive with a few clicks, and get every optimised drive solution that fits your design parameters. At the same time, the Design Flex® Pro™ drive calculation provides the detailed belt pretension data for use with Gates deflection or sonic tension meters. Download now! (free, registration required)

Click here to download it.

Design Flex® Pro™ WEB version also available!

Technical service
Country Languages spoken Phone number
Spain      +34 93 877 7032
France     +33 1 34 47 41 33
Germany   +49 241 5108 288 or 240
Poland   +48 60 83 54 854
Russia   +7 495 933 83 78
UK +44 1387 24 20 49
Design Flex® Gates' industrial drive design software now available online
Gates' Design Flex® is a Windows based drive calculation program allowing the design of belt-drive systems with increased efficiency and enhanced performance in less time. This powerful software is now avalailable to you for free over the internet.
Design Flex® : updated version now online!
Now included: PowerGrip® GT3, Poly Chain® GT Carbon™ and Quad-Power II upgraded power ratings. Problems with Windows XP SP 2 Integrated solved.
Fast and easy

Design Flex® offers a step-by-step drive calculation procedure for both V- and synchronous belts based on the criteria and/or limitations specified by the user. By means of an easy to follow menu, two pulley drives are calculated and multiple drive design solutions are generated.

Design Flex® lets you save your drive results, so you can easily build an electronic library or immediately e-mail your design without the need for printing and faxing.
Design criteria include:
  • Service life
  • Initial cost of drive
  • Number of belts - size of drive
  • Required parts and more
Who qualifies?
Because Design Flex® is a professional-grade design tool it is intended for design engineers and others who are well versed in drive design.
Download it now!

The program offers a step-by-step drive calculation procedure for both V-belts and synchronous belts based on the critera and/or limitations specified by the user. Design Flex® runs under Windows 95, 98, 2000, NT, Millennium, requires a Pentium 133 processor or higher and an 800 x 600 screen resolution or higher. A minimum of 32 MB RAM is recommended for satisfactory calculation speed.

To download your free copy of Design Flex® simply click here to go to the sign up page now. After registering at we will notify you via email with instructions on downloading the program.

Register Now to Download Your Copy of the Gates Design Flex® program.
Mobile version
The mobile version of our Design Flex® software has arrived! This web application is available for all mobile devices with internet access at /DFMobile. It's fast and easy to design a 2-point drive with multiple synchronous and V-belt solutions that fit your parameters. You can email the solution – as well as the DFPro source file – to yourself or your customer. Need to know proper tension for a known drive? DFMobile can help with that, too!