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Bench Grinder Has a Finger-Eating Gap

Retired Engineer Alan Falk spends lots of time in his workshop. Recently, he spent some unwelcome time in the ER: small-cimg1721.jpg

“Earlier this year I learned that my Ryobi bench grinder has an awful design flaw: The shields on the grinding wheels have too wide of a gap between the “shield” and the wheel – wide enough to suck your finger in by friction when the wheel is spinning. It happened to me and cut a nice wedge out of my fingertip, like the “cross-sectional diagrams” of planets and stars you might see in an issue of Astronomy Magazine. My finger healed completely, but Ryobi has not responded to my gentle prods to redesign the covers. Basically, the outer protective covers should provide clearance at the center [axle] for the nuts and washers that hold the wheels onto the shaft and after that, should be as close as practical (maybe 0.25 inch max) to the side surface of the grinding wheels. Anyone who designs it any other way has had too much design school and apparently ZERO time in the workshop.”

Tags: Bench Grinder, engineer, grinding wheels, planets and stars, washers

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7 Comments

  1. March 30, 2009 12:45

    Thanks for sharing that, Mark. I can’t find equivalent UK regulations online.

  2. Mark Browne
    March 27, 2009 15:08

    OSHA spells all this out in 1910.215:
    http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_id=9839&p_table=STANDARDS
    The OSHA standards are online and free.

  3. Richard Jacobs
    February 24, 2009 00:42

    yeah!!! puttin you’re finger’s within 10 feet oops i meen 8 metre’s of a grinda is just stupid????!!! you crazy fool!!!

  4. Trevor Clay
    August 18, 2008 19:39

    I do, inches are much easier to work with than metric, It is easier to see the divisions on a ruler as well. I can work in metric but I was bought up in th 1970′s on imperial.

  5. richard jacobs
    August 13, 2008 11:30

    Oh and sorry who still works in inch’s?????????

  6. richard jacobs
    August 13, 2008 11:29

    What are you doing with your fingers neer that part of the wheel/grinder???????????? own fault sorry!!!

  7. paul
    June 02, 2008 17:33

    just a quick question i hope you can answer for me what is the correct name for the piece that is in front of the grinder that you use to rest is it a guard, seat? cheers

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