1. Week 43of the BladeForums.com Year of Giveaways is live! Enter to win a Spyderco C243PBK Edela + Misc Prize Pack

    Click here to enter the drawing for your chance to win a Spyderco Endela + Misc Prize Pack , Bladeforums.com swag or memberships!
    Be sure to read the rules before entering, and help us decide next week's giveaway by hitting the poll in that thread!

    Entries will close at 11:59PM Saturday, Oct 26 ; winners will be drawn on Sunday @ 5pm on our Youtube Channel: TheRealBladeForums. Bonus prizes will be given during the livestream!

    Questions? Comments? Post in the discussion thread here
  2. Week 42 drawing for the BladeForums.com 20th Anniversary Year of Giveaways live stream, going on from 5-6PM eastern!!
    Tune in to our YouTube Channel, http://www.youtube.com/TheRealBladeforums, we'll be drawing winners for BladeForums.com merchandise & the grand prize:
    an Kizer Vanguard V4516A1 Domin Folding Knife & Ka-Bar Dozier Folding Hunter , along with BladeForums branded gear!

    Additional prize(s) will be awarded to people in the livestream chat, so watch for your chance to win bonus prize(s)

Spark Bong Dust Collector

Discussion in 'Hammer & Tongs' started by J. Hoffman, Dec 12, 2015.

  1. J. Hoffman

    J. Hoffman KnifeMaker / Craftsman / Service Provider Knifemaker / Craftsman / Service Provider

    Jan 1, 2011
    I did this video showing my spark bong that I made for collecting dust and sparks from the grinder. Check it out and feel free to ask questions, or bring up concerns. I'm sure it's not perfect.
  2. Bill Sutherland

    Bill Sutherland

    Mar 13, 2016
    Mr. J. Hoffman,
    Your idea is great, it gets the job done, and done well!
    Is there a way to use the gravitational pull/fall of the spark debris within a non-heat-conducting pipe material, in addition to a copper tube heat sink positioned in the center of the downdraft pipe that pulls the heated air up and out of the bucket? The more you create sparks, the hotter the copper tubing becomes, and the more aggressive exhaust of heated rising air will create a negative pressure in the bucket which will suck-in the cloud of sparks. The size and configuration of the copper heat sink will determine the success of this design. A number of medium-sized copper tubes or a coil of copper tubing feeding into one small vertical tube will increase the velocity of air being exhausted. The catch pipe must not absorb heat, but must direct the sparks and heat to the heat sink tubing.
    If this works, there may be no need for a noisy shop vacuum.
    Thanks for your ear,
    Bill Sutherland
  3. Stacy E. Apelt - Bladesmith

    Stacy E. Apelt - Bladesmith ilmarinen - MODERATOR Moderator Knifemaker / Craftsman / Service Provider

    Aug 20, 2004
    That sounds good in theory, but what you are talking about is convection, not extraction. You need a moving air volume to extract the fines and the dust. It requires a shop vac or a large blower.
  4. Cody Hofsommer

    Cody Hofsommer

    Dec 2, 2011
    Jess, any idea what percentages of grinding dust ends up on the bong versus the shop vac? Or maybe a better way to say it is, how much makes it to the vac?
    I'm assuming you only use this for steel, not handle material.

  5. melsdad


    Apr 3, 2008
    With this set-up do grind both steel and wood without issue?

Share This Page