shop vac. as dust collection question

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Forum topic by jems posted 03-18-2010 06:29 AM 1053 views 0 times favorited 2 replies Add to Favorites Watch
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47 posts in 3025 days

03-18-2010 06:29 AM

Topic tags/keywords: question shop vac as dust collector

i have a 4.5 hp vac. with a 1 1/2 hose should i change it out to a 3 or 4 in hose i would plug the existing hole and just make a bigger hole for the bigger hose

-- every good gift and every pefect gift is from above James 1:17

2 replies so far

View Rick  Dennington's profile

Rick Dennington

5912 posts in 3221 days

#1 posted 03-18-2010 06:44 AM

Greetings jems: Changing out the size of the hose is not to make one bit of difference in the suction of the vac….. a little explanation here….. a shop vac is NOT a dust collector. It usually only has about 180-200 cfm pull. It works fine for vacumning up the sawdust on the floor or shop maintanance, but not for collecting sawdust and chips from tools like jointers, planers, tablesaws, etc. You need a d.c that has about 1100-1200 cfms for that kind of job on machines. If it were me, I wouldn’t destroy a shop vac to try to gain more suction with a bigger hose…. it ain’t gonna happen….. just my nickels worth of advice. Keep on keeping on…...

-- " At my age, happy hour is a crap and a nap".....

View davidpettinger's profile


661 posts in 3227 days

#2 posted 03-18-2010 03:12 PM

I have to agree with Rick, The shop vac was designed to operate with that specific hose size. Going bigger will only reduce its efficiency. Use it in conjunction with a dust collection system.

As Rick stated, the volume of air that a dust collector moves helps remove particulate matter. The vac is great for the cleanup.

-- Methods are many,Principles are few.Methods change often,Principles never do.

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