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Production > Boring/Mortising Machines
Boring and mortising machines use boring bits or mortising chains to cut cavities in pieces of stock. These cavities are often used in mortise and tenon joints. This shows a chain mortising machine. Chain mortising machine with labeled parts such as dust hood, back fence, stock clamp, foot treadle, elevation crank, and mortising chain
Fig 1 - Chain mortising machine



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Point of Operation Top
Potential Hazard:
Possible Solutions:

Engineering Controls
  • Enclose boring bits with a guard that encloses the bit and chuck above the material being worked [1910.213(l)(2)].
  • Enclose the top of the cutting chain and driving mechanism [1910.213(l)(3)].

  • Cover operating treadles with inverted U-shaped guard to prevent accidental tripping [1910.213(l)(6)].
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Rotating Parts Top
Potential Hazard:

  • Rotating parts - Clothing or hair may be caught on rotating boring bit or mortising chain.
Possible Solutions:

Engineering Controls
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Miscellaneous Hazards/Solutions Top
Potential Hazards:

  • In-running nip points - Clothing, hair, or hands may be caught by and pulled into in-running rolls of automatic feed.

  • Flying chips - Wood chips and splinters may be thrown by the cutting action.

  • Kickbacks - Stock may be thrown back at operator.
Possible Solutions:

Engineering Controls
  • If a counterweight is used, prevent it from dropping by bolting it to the bar or attaching a safety chain to it [1910.213(l)(4)].
  • Cover operating treadles with inverted U-shaped guard to prevent accidental tripping [1910.213(l)(6)].
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