Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Machine Guarding OSHA requirements...

Machine Guarding OSHA requirements...

Machine Guarding OSHA requirements...

thread283-394070: Add Emergency Stop Button to old machinery (machne tools)
In reference to the year-old question, my professional opinion as a CSP consultant is the following: OSHA requirements are legal, not moral or ethical standards. On the other hand, the failure to comply with community standards or to observe due diligence or best practice, beyond the legal requirements, might expose the person or business to undesirable liability risk.

OSHA requirements originated from the ANSI B series of machine guarding when OSHA was formed in 1970-71. Beyond the limited text of the standards at 29 CFR 1910.212 through 219, OSHA also incorporated by reference ANSI standards related to safeguarding grinders, power transmission (belts, sprockets, chains, etc.), and conveyors. These ANSI Stds are: a) ANSI B7.1-70 (grinders), b) ANSI B15.1-53 (R 58) (belts, sprockets, etc.), and c) ANSI B20.1-57 Safety Code for Conveyors, etc.

Neither the OSHA regulatory text nor the consensus standards incorporated by reference require the use of stop emergency buttons, or one-handed/two-handed controls of machinery or equipment.

OSHA enforces these requirements through one of three ways: a) The general machine guarding requirement at 1910.212(a)(1), where various methods of protection are suggested, including but not limited to buttons, to protect from "from hazards such as those created by point of operation, in-going nip points, rotating parts, flying chips and sparks"; b) for the point of operation guarding only, 1910.212(a)(3)(ii), which requires guarding conforming to "any appropriate standards" or otherwise effective; c) for other types of hazards or machinery, OSHA would apply the general duty clause Sec 5(a)(1) of the Act, having to show a recognized serious hazard and a feasible means of abatement, usually by referencing ANSI, NFPA, NEC, ASME, ASHRAE, and even ACGIH.

Age of the equipment WILL not preempt a violation of machine guarding standards subject to one of these regulatory tools. There are a lot of machine-guarding guides that will help with most applications. For more complicated requirements, many outfits who specialize in machine guarding or a knowledgeable consultant would be able to assist.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close