Terms of service
Last updated: 15 October 2026
What these terms cover
This website, proctfive.com, and the proct5 apps.
The proct5 apps
The proct5 apps are private tools. They publish our own videos to the proct5 accounts on YouTube, Instagram and TikTok and read those accounts' statistics. They are not offered to anyone else, and no one else can sign in to them.
Content
Our videos and texts explain rolling bearings in general terms. They are not engineering advice for a particular application: check a bearing's suitability with a qualified engineer and the manufacturer's data before relying on it.
Copyright
Videos, images and texts are © Friedrich Schulz. You are welcome to link to them and to share them on the platforms where they are published.