Machine Guarding


Machine guarding hazards are addressed in specific OSHA standards for agriculture, general industry, maritime, and construction. This section highlights OSHA standards and documents related to machine guarding.

OSHA Standards
General Industry (29 CFR 1910)
General Industry (29 CFR 1910)
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1910 Subpart O - Machinery and Machine Guarding

1910.211, Definitions.

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1910.212, General requirements for all machines.

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1910.213, Woodworking machinery requirements.

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1910.215, Abrasive wheel machinery.

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1910.216, Mills and calenders in the rubber and plastics industries.

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1910.217, Mechanical power presses.

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1910.218, Forging machines.

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1910.219, Mechanical power-transmission apparatus.

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1910 Subpart R - Special Industries

1910.262, Textiles.

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1910.263, Bakery equipment.

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1910.268, Telecommunications. Paragraph (b)(1)(v) addresses some general requirements for machine guarding.

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Maritime (29 CFR 1915, 1917, 1918)
Maritime (29 CFR 1915, 1917, 1918)
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1917 Subpart G - Related Terminal Operations and Equipment

1917.151, Machine guarding.

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1918 Subpart I

1918.96, Maintenance and repair work in the vicinity of longshoring operations. Paragraph (e) contains general requirements for machine guarding (see also 29 CFR 1918.2, definition of "danger zone").

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Construction Industry (29 CFR 1926)
Construction Industry (29 CFR 1926)
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1926 Subpart I - Tools - Hand and Power

1926.300, General requirements.

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1926.301, Hand tools.

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1926.302, Power-operated hand tools.

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1926.303, Abrasive wheels and tools.

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1926.304, Woodworking tools.

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1926.305, Jacks-lever and ratchet, screw, and hydraulic.

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1926.306, Air receivers.

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1926.307, Mechanical power-transmission apparatus.

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Agriculture Industry (29 CFR 1928)
Agriculture Industry (29 CFR 1928)
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1928 Subpart D - Safety for Agricultural Equipment

1928.57, Guarding of farm field equipment, farmstead equipment, and cotton gins.

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State Plan Standards

There are 29 OSHA-approved State Plans operating state-wide occupational safety and health programs. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or more stringent requirements.

Additional Federal Register Notices

Note: The federal registers in this list provide additional information that is not necessarily connected to a specific OSHA standard highlighted on this Safety and Health Topics page.

  • Power Presses. Proposed Rules 72:30729-30734, (June 4, 2007). OSHA is seeking comments on whether and how the mechanical power presses standard should be amended, including whether the requirements pertaining to the use of presence-sensing-device initiation (PSDI) systems should be revised and whether the scope of the standard should be expanded to cover other types of presses.
  • Mechanical Power -- Transmission Apparatus; Mechanical Power Presses; Telecommunications; Hydrogen. Final Rules 69:31880-31882, (June 8, 2004). Corrects errors in four OSHA standards:
    1. The first correction deletes two references to a non existing table in the Mechanical Power-Transmission Apparatus Standard.
    2. The second is a correction of typographical errors in the Mechanical Power Presses Standard.
    3. The third correction is to a cross-reference in the Telecommunications Standard.
    4. The fourth correction is to a reference to a table contained in the Hazardous Materials Standard for Hydrogen.
  • Notice of Availability of the Regulatory Flexibility Act Review of Presence Sensing Device Initiation for Mechanical Power Presses. Proposed Rules 69:31927-31929, (June 8, 2004). OSHA has conducted a review of the Presence Sensing Device Initiation (PSDI) requirements of the Mechanical Power Presses Standard pursuant to section 610 of the Regulatory Flexibility Act, and section 5 of Executive Order 12866 on Regulatory Planning and Review. Based on this review and public comments, OSHA has decided to update its mechanical power press standard to ANSI B.11.1-2001
  • Mechanical Power Presses. Final Rules 53:8322-65, (March 14, 1988). Amendment of the standard for mechanical power presses, 29 CFR 1910.217, to allow (but not require) presence sensing device initiation (PSDI) on certain types of power presses.
Additional Directives

Note: The directives in this list provide additional information that is not necessarily connected to a specific OSHA standard highlighted on this Safety and Health Topics page.

National Consensus

Note: These are NOT OSHA regulations. However, they do provide guidance from their originating organizations related to worker protection.

American National Standards Institute (ANSI)

  • ANSI B11 Subcommittees. The ANSI B11 committee is responsible for developing machine tool safety standards. This document provides brief descriptions of the subcommittees and the hazards they are addressing.
    • B11.1, Safety Requirements for Mechanical Power Presses
    • B11.2 (R05), Hydraulic Power Presses - Safety Requirements for Construction, Care, and Use
    • B11.3, Safety Requirements for Power Press Brakes
    • B11.4, Safety Requirements for Shears
    • B11.5 (R05), Ironworkers - Safety Requirements for Construction, Care, and Use
    • B11.6, Safety Requirements for Manual Turning Machines with or without Automatic Control
    • B11.7 (R05), Cold Headers & Cold Formers - Safety Requirements for Construction, Care, and Use
    • B11.8, Safety Requirements for Manual Milling, Drilling, & Boring Machines with or without Automatic Control
    • B11.9 (R05), Safety Requirements for the Construction, Care, and Use of Grinding Machines
    • B11.10, Safety Requirements for Metal Sawing Machines
    • B11.11, Safety Requirements for Gear and Spline Cutting Machines
    • B11.12, Safety Requirements for Roll Forming & Roll Bending Machines
    • B11.13 (R98), Single and Multiple-Spindle Automatic Bar, and Chucking Machines - Safety Requirements for Construction, Care, and Use
    • B11.14, Coil Slitting Machines - Safety Requirements for Construction, Care, and Use
    • B11.15, Safety Requirements for Pipe, Tube and Shape Bending Machines
    • B11.16 (MPIF #47), Safety Requirements for Powder/Metal Compacting Presses
    • B11.17, Safety Requirements for Horizontal Hydraulic Extrusion Presses
    • B11.18, Safety Requirements for Machines and Machinery Systems for Processing or Slitting or Non-Coiled Metal Strip, Sheet or Plate
    • B11.19, Performance Criteria for Safeguarding
    • B11.20, Safety Requirements for Integrated Manufacturing Systems
    • B11.21, Safety Requirements for Machine Tools Using Lasers For Processing Materials
    • B11.22, Safety Requirements for Turning Centers and Automatic Numerically Controlled Turning Machines
    • B11.23, Safety Requirements for Machining Centers and Automatic Numerically Controlled Milling, Drilling and Boring Machines
    • B11.24, Safety Requirements for Transfer Machines
    • B11.TR 1, Ergonomic Guidelines for the Design, Installation And Use of Machine Tools
    • B11.TR 2, Mist Control Considerations for the Design, Installation And Use of Machine Tools Using Metalworking Fluids
    • B11.TR 3, Risk Assessment and Risk Reduction- A Guideline to Estimate, Evaluate and Reduce Risks Associated with Machine Tools
    • B11.TR 4, Selection of Programmable Electronic Systems (PES/PLC) for Machine Tools
    • B11.TR5, Sound Level Measurement Guidelines (not an approved document; in development)
    • B11.TR6, Control Reliable Circuits and Servo Drive Technology