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30 CFR § 18.21 - Machines equipped with powered dust collectors.

---
identifier: "/us/cfr/t30/s18.21"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 18.21 - Machines equipped with powered dust collectors."
title_number: 30
title_name: "Mineral Resources"
section_number: "18.21"
section_name: "Machines equipped with powered dust collectors."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "B"
subchapter_name: "TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS"
part_number: "18"
part_name: "ELECTRIC MOTOR-DRIVEN MINE EQUIPMENT AND ACCESSORIES"
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: "33 FR 4660, Mar. 19, 1968, unless otherwise noted."
cfr_part: "18"
---

# 18.21 Machines equipped with powered dust collectors.

Powered dust collectors on machines submitted for approval shall meet the applicable requirements of Part 33 of this chapter (Bureau of Mines Schedule 25B), and shall bear the approval number assigned by MSHA.