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Gold Prospecting Forums - General => Do It Yourself Projects => Topic started by: sawdust on May 04, 2019, 07:39:36 AM

Title: crevice hand suction tool
Post by: sawdust on May 04, 2019, 07:39:36 AM
i`m looking for plans for an  efficient hand crevice suction tool. If anyone knows a a design for a good one  for cleaning the last bits out of bedrock crevices I`d appreciate  the help.
Title: Re: crevice hand suction tool
Post by: DharmaSoldat on May 04, 2019, 07:46:11 AM
I've built a couple... out of ABS and PVC pipe and fittings using a pair of Oatey mechanical test plugs.

There are lots of good vids on youtube, and there are posts on here too (including a couple of my designs).

The only caveat is that unless you have the glue/cement/primer and related tools it's a bit more up front cost than you'd expect. That being said, I've had a bunch of builds using plastics that make it worthwhile.

The classic:
https://www.youtube.com/watch?v=Cq9VlFFWtN8

A shrimp sucker, but uses the same oatey plug design I use for all of mine:
https://www.youtube.com/watch?v=mgmh4ztISu0

Lastly, a biggun - I built a 3" one that does wonders:
https://www.youtube.com/watch?v=uASsYLwdJy4

Hope this helps :D
Title: Re: crevice hand suction tool
Post by: sunshine on May 04, 2019, 09:22:03 AM
I bought my hand dredge/crevice sucker.  My one modification was to put a rubber flexible gasket between the crevice tip and the main body of the sucker (rather than glue it).   This solved a problem,  whereby I broke the tip off (twice) when using the sucker in fast water.  The tip got caught between rocks and then the rushing water pushed the sucker at an angle, snapping off the tip.  The rubber still seals well, but has some flex (more forgiving). 
Title: Re: crevice hand suction tool
Post by: mcbain on May 04, 2019, 09:30:54 PM
 :) ;) <-smug-> <~ShOcK~> <~ShOcK~> <-hypnotized-> :-[ <-waiting-> <-frustrated-> >:( {-censored-} [^Crazy!#].AskA  junor inspector. <-d'oh-> <-sealed_> <-dont~know-> <-dont~know->
Title: Re: crevice hand suction tool
Post by: sawdust on May 05, 2019, 07:56:42 AM
Well, I appreciate your sentiments, Mark, but I think that would result in nearby moss being sucked off the rock. Too much suck. I watched a couple of Youtube videos and picked a few points out of each. Should turn out good. Thanks for the suggestions, all.