---
kind: "section"
citation: "30 C.F.R. § 33.22"
title: "30"
number: "33.22"
heading: "Mode of use."
url: "https://uscodex.org/cfr/30/33.22"
---

# §33.22. Mode of use.

- (a) A unit or system may be designed for use in connection with percussion and/or rotary drilling in any combination of the following drilling positions: (1) Vertically upward, (2) upward at angles to the vertical, (3) horizontally, and (4) downward.
- (b) Dust-collector units may be designed for use with specific drilling equipment or at specific drilling speeds.

## Notes

### Authority

Authority: 30 U.S.C. 957, 961.

### Source

Source: Schedule 25B, 25 FR 6473, July 9, 1960, unless otherwise noted.