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Forum topic by secretgarden | posted 02-12-2014 05:58 PM | 1008 views | 0 times favorited | 2 replies | ![]() |
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02-12-2014 05:58 PM |
I have a Jet 1200 2 hp dc hooked up with a wok baffle, Super Dust Deputy (SSD) and a 5 ft run of 5 inch duct. I measured the velocity at this juncture at 5447 fpm/1089 cfm. At this point, I’m a happy camper. I then ran 8 ft of 5 inch flex to my Jet 10in cabinet tablesaw and measured 4375 fpm/875 cfm. Still happy. I changed the 4 in port on the tablesaw to a 4 in x 10 in metal HAVC floor vent with a 6 in intake port. I had to add a 5 in to 6 in tapered reducer in order to hook up to the floor vent, thank you SSD for the 5 inch port. I measured the suction from the inside of my tablesaw cabinet at the 4 in x 10 in opening with a shocking drop down to 1560 fpm/310 cfm. I’m doing all this work to buy time till next year when I plan to purchase a Clear View cyclone and sell the Jet. Is this a normal drop from 4375 fpm/875cfm down to 1560 fpm/310 cfm due to the size of 4 in x 10 in adapted tablesaw hood or was my thinking on this wrong ie… bigger duct, shorter runs would produce better dust collection using the 2 hp dc? I will add that the velocity measured at the throat plate was 550 fpm and felt a lot stronger than I have ever had. |