[secretgarden]

Jet 2 hp 1200 with 5 in duct data

I changed all my hoods to 6 in then bought a Super Dust Deputy (SSD) after seeing the action of a small Dust Deputy. I failed to read the clearly marked box on the SSD that states a 5 in intake. Oops.

I bought long 6in to 5in tapered reducers from Home Depot (HD) adding this to the 6in hoods. I borrowed a Alnor Anemometer model RVA+ and measured the intake numbers at several spots with the results as follows;

1) 6 in impeller opening with a 90 degree joint measured 5676 fpm/1114 cfm

2) 6 in impeller opening with above plus 2 each 90 degree joints and 4 ft 6 in metal snap together duct 26 gauge from HD and it measured 5004 fpm/1001 cfm.

3) above data hooked to the SSD sitting on a 55 gal drum and 5 feet of 5 in metal duct from the intake of the SSD measured 5852 fpm/1170 cfm,

4) using 8 foot of 6in flex instead of 4 foot of 6in metal duct from the impeller to the SSD did not make much of a change when compared to #3 (5447 fpm/1089 cfm).

I did not hook up a 4 in duct but I believe using Bill Pentz data shows that just increasing to 5 in will give you better numbers. Therefore, I would have used all 6in duct, but due to my inability to read clearly marked info I used 5in with a lot more air/dust captured vs using 4in duct. I called Oneida and there will not be a 6 in intake and they do not recommend changing the intake size. Oh well I'll start taking reading lessons with the grandkids.

 

[secretgarden]

Your cart is exactly the project I started yesterday, but I am still in the design phase. I have the same DC with an add on Walmart wok ($5.00) to keep the dust inside the collection bag (works great). The major difference will be that my impeller intake port will be turned 90 degrees from yours to face the output port of the SDD sitting on top on a 55 gal metal drum ($27.00 from Dan the Barrel Man, San Antonio) eliminating one 90 degree turn and some flex tubing.

I was concerned about changing the impeller position to the upside down position and potentially causing undue stress to any bushing/bearings/motor. I had called Jet but they were non-committal about any stress that might occur to making impeller upside down.

You saved me a great deal of design time. Thanks loads, Fred Thompson San Antonio

PS. Home Depot (HD) has 6 inch thin walled, black interior HDPE/SDR 43 pipe for $14.03 shipping free to my local store with delivery time <1 week. Lowe's Online has 666 wye/664 wye/22.5/45/90 fittings that perfectly mate to this pipe. It is available cheap with same free delivery as HD. I assume these are available across the US, but for sure here in San Antonio, TX. I drew blank looks previously asking for the ASTM 2729 pipe/fittings. Apparently they stock it as irrigation pipe.

Order on line with delivery to store because the negative feedback from both stores website mostly complain about damage in shipping. My stores allow to refuse the material if damaged thereby any aggravation with their return policies. I just do not have to accept damage goods at their store. No cost, no problem.