---
kind: "section"
citation: "14 C.F.R. § 25.693"
title: "14"
number: "25.693"
heading: "Joints."
url: "https://uscodex.org/cfr/14/25.693"
---

# §25.693. Joints.


Control system joints (in push-pull systems) that are subject to angular motion, except those in ball and roller bearing systems, must have a special factor of safety of not less than 3.33 with respect to the ultimate bearing strength of the softest material used as a bearing. This factor may be reduced to 2.0 for joints in cable control systems. For ball or roller bearings, the approved ratings may not be exceeded.


## Notes

### Amendments

[Amdt. 25-72, 55 FR 29777, July 20, 1990]

### Authority

Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701, 44702 and 44704; Pub. L. 115-254, 132 Stat 3281 (49 U.S.C. 44903 note).

### Source

Source: Docket No. 5066, 29 FR 18291, Dec. 24, 1964, unless otherwise noted.

### Amendments

[Amdt. 25-72, 55 FR 29777, July 20, 1990]