Sawdust Collection

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  #1  
Old 07-05-05, 08:30 AM
sorethumb
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Sawdust Collection

I just bought a new table saw and it works great. However, I hooked up an old canister type vacuum cleaner to the sawdust discharge nozzle and it collects perhaps 1/2 to 2/3 of the dust with the remainder scattered around on the saw and floor. I suspect it doesn't have the power or vacuum to do the job. Since this canister actually has more vacuum than a new upright vacuum, I suspect that vacuum cleaners are not up the task.

I looked at collectors at some of the department stores but I'm distrustful that they can do the job any better. I'm not interested in a combination wet/dry system - just sawdust collection. Can anyone offer a recommendation for a sawdust collector that works well? Thanks.
 
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  #2  
Old 07-05-05, 01:19 PM
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Any Shop Vac type brand with the large 2 1/2" hose. House hold canisters have 1 1/4" hose and are undersized for tablesaws.
 
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Old 07-05-05, 04:15 PM
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Lugnut is on the right track.
You can't beat a true shop dust collector but the large Craftsman shop vac I use works well enough for my purposes.
 
  #4  
Old 07-06-05, 12:32 AM
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I'd like to echo Greg's thoughts on the dust collector. Shop vacs work fine, but dust collectors are designed with that task in mind. I think most shop vacs are rated between 100-200 CFM of airflow, whereas even a basic portable dust collector like ones made by Delta or Jet is rated for around 500. A table saw usually calls for 300-400 or so, if I remember right.

That said, it depends on your needs and how much you use your saw. In my case a dust collector is indispensable, but in your case it may not be.

For anyone else that may be interested in the topic and decide to go shop vac, the actual ShopVac brand makes a sawdust collection system with multiple vacuum gates, tubing, couplings, and so on. (Not intended to promote the brand.)

Have fun with your new saw, and here's hoping you have no "sorethumbs"!
 
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Old 07-06-05, 04:54 AM
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Originally Posted by sorethumb
I looked at collectors at some of the department stores but I'm distrustful that they can do the job any better. Can anyone offer a recommendation for a sawdust collector that works well? Thanks.
You are probably correct about the dept. store dust collectors
Try some stores where the tradesmen go
 
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Old 07-06-05, 10:15 AM
sorethumb
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Thanks guys for all the good info. I checked the Shop Vac website and only found wet/dry systems & none of the 'product descriptions' provided CFM ratings - only gal. capacity and "peak" HP. The quality of this brand is touted as being high but I'd rather stick to dry collection only. I've learned by experience that my 1-1/4" canister hose is undersized - and so is the CFM. The Sears Craftsman catalog offers a 1-1/2HP, 1200 CFM for $300 and a 1HP, 650CFM for $220 - both are dry collection only. It appears that these two have sufficient volume capacity and the hoses are 4"dia. I'm going to go look at one and perhaps check out Delta or Jet.

Again, thanks a bunch....
 
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Old 07-06-05, 11:02 AM
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Here is a chart with a few brands of dust collection units. It may give you the info you desire. Good luck with your projects.

http://www.woodcraft.com/articles.as...fcode=06IN07NL
 
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Old 07-06-05, 04:08 PM
sorethumb
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majakdragon - thanks for the chart - it's very informative

I've come down to 3 choices - all 3 are 1 HP, 650CFM; -
Delta AP400 - includes 4" hose - Amazon.com price $160
Jet DC-650A - hose is extra $18 - Amazon.com price w/hose $274*
Craftsman 921336 - incl. hose - shipping $39, tax $15 for total Sears price of $274* (* coincidence)

I'm familiar with Craftsman and always thought of their tools as "..pretty good for the money...". However I have no experience w/Delta or Jet. If I knew that the quality of all three are about the same, I would go with the Delta and save over $100. Can anyone give me some advice on how the quality of these three units compare?, i.e., what would you select? I'm a bit concerned that a unit priced at 60% of its competitors might be missing something. Thanks.
 
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Old 07-07-05, 12:52 AM
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Of the 3, I would go with the Delta. It's fundamentally the same as the Craftsman and Jet, and under those circumstances it usually comes down to brand preference or loyalty.

One advantage the Delta has over the others is price/performance. The price is more competitive than the Craftsman and Jet both, and it has a slight performance advantage in regards to static pressure over both as well, at least according to the chart from Woodcraft. A higher static pressure number usually indicates a more efficient machine, although all are rated at the same 650 CFM.

One thing you can do with any of these dust collectors down the road to improve their efficiency is upgrade to a finer bag. If you look at that chart, it shows the filter capacity in microns. The smaller the better. The ones you've selected all have 30 micron bags, which means the bag will capture any particles 30 microns or larger. A 1 micron bag will capture any particles 1 micron or larger. Doesn't sound like much but it does collect over time, and a finer bag is also much better on the old breathing apparatus.
 
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Old 07-07-05, 04:58 AM
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Davek, I might be concerned that replacing the 30 micron bag with the 1 micron bag might overload the design capacity of the motor. I suspect that a less powerful, lower cost motor/blower combination, is matched to the 30 micron bag and may be partly why it is a lower cost unit.
 
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Old 07-07-05, 02:14 PM
sorethumb
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Thanks again for the help. I'll certainly keep filtration size in mind in the future - especially if I start to acculmulate fine layers of sawdust. It appears that Delta is likely the best choice.
 
  #12  
Old 07-07-05, 09:39 PM
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Lugnut, if it were replaced by a bag with a larger capacity it could be an issue, but if it were the same size it won't make that much of a difference at all. I've known several WWs with the same collector or a different brand equivalent that have never had an issue.

The price differential is as much about the brand as it is the performance in some cases. The Sears/Craftsman brand is typically manufactured for Sears by other companies, and Sears has never been shy about recouping the cost with their retail pricing. One example is a table saw that was made by Ryobi that sold for $400-$450 under the Craftsman brand, $300 as a Ryobi tool. Delta is a brand that has traditionally catered to an broad spectrum of customer, from the novice to the professional. The Jet brand has generally covered the mid to professional level of customer, and it reflects in their prices. With the dust collectors they list on that chart. The two lower end models they have are really the same model with the same motor, one with a 30 micron bag, the other with a 2 micron canister. The price differential is a reflection of the more expensive canister system, not the performance of the unit itself. Also, you'll find less plastic in a Jet tool in general than you would a lot of lower end Delta or Crafstman tools.

Dust collection has its own gray areas, not unlike rated or maximum horespower vs. actual poweron larger tools, or amps on a cordless tool vs. torque rating.
 
  #13  
Old 07-29-05, 12:12 PM
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Something to think about

I've been using my Sears shop vac as a dust collector on my table saw and found a cheap way to improve the efficiency by adding a 'collection' bucket between the saw and the vac. It has a special cover that is supposed to create a swirling effect to capture the larger particles so the vac filter does not clog as rapidly.
 
  #14  
Old 07-29-05, 02:35 PM
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denk,

Is this what you have?
I was considering installing my shop vac outside with my air compressor and just having one of these inside.
It would be a real pleasure to not have to listen to that thing howling.

Do you loose any suction with this set up?

Click image:

<img src="http://www.leevalley.com/images/item/woodworking/powertool/05j3001s3.jpg">
Image credit: leevalley.com
 
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