30 CFR § 33.22 - Mode of use.

---
identifier: "/us/cfr/t30/s33.22"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 33.22 - Mode of use."
title_number: 30
title_name: "Mineral Resources"
section_number: "33.22"
section_name: "Mode of use."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "B"
subchapter_name: "TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS"
part_number: "33"
part_name: "DUST COLLECTORS FOR USE IN CONNECTION WITH ROCK DRILLING IN COAL MINES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 957, 961."
regulatory_source: "Schedule 25B, 25 FR 6473, July 9, 1960, unless otherwise noted."
cfr_part: "33"
---


# 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.