Thread: Please help understand the difference

You could buy 2 of the Sherwood and still have some change in you pocket, that a big difference

The only thing I can see is the Leda has slightly bigger filters so it will have a slightly greater air flow.
Other that that - nothing.

Ahh so thats where the higher CFM spec comes from, bigger bags? Its actually the exact same machine though isnt it?

I was never buying it new, but there is the leda available cheap second hand, but even the second price is the sherwood new price...i would rather get something like this new.

Any issues with building a direct connected cyclone and venting this outside with a single outlet?

The inlet on the Sherwood is 6" while on the Leda it's 8". Although they look the same on the outlet side of the fan I'd be surprised if the dimensions of the outlet are the same. The Sherwood is almost certainly made in China whilst the Leda is likely made in Taiwan. The Leda is 17% (10 Kg) heavier. Despite these differences it's very hard to see that much extra value in the Leda.

Originally Posted by Pete99

Ahh so thats where the higher CFM spec comes from, bigger bags? Its actually the exact same machine though isnt it?

Yep - pretty much. I would forget the CFM ratings they are overblown to billy-o.
The air flow limit through those DCs is what they can pull through a 6" duct and that will be (on a good day, with wind assistance and squinting eyes) 1250 CFM.

I was never buying it new, but there is the leda available cheap second hand, but even the second price is the sherwood new price...i would rather get something like this new.
Any issues with building a direct connected cyclone and venting this outside with a single outlet?

If you put a cyclone on those you will just slow down the airflow - it depends on the cyclone but my guess is it will be between 25 and 40%, this will drop the flow significantly below the 1250 CFM. This is critical because this then means you won't be harvesting the fine dust at the source and that means it ends up contamination your shed.

The most flow you will get through those impellers is with no cyclone and clean bags.
Eventually if you let the bags clog up the flow will fall below that of having a cyclone BUT if you let things get that bad you deserve this to happened.
I reckon its also better to never let teh collection bags get too full and they should be emptied before that get more than 2/3rds fukk and preferably when they are about 1/2 full.

Best solution is DC with filter bags outside the shed , or inside an air tight enclosure inside ether shed than is vented outside the shed.

@Aldav so what is the difference do you think?

@Bobl i have the room etc to put this outside, but i need to build some lean to on the shed, would need to look nice, i'm not sure. The only methods i have seen are where the Cyclone was inside and the vent outside which was fairly simple. I'd prefer simple, which is to vent outside as i wouldnt have to build a housing for the whole DC/Bags etc. Is this possible with this model?

I've had two different 3hp DE's over the years, one a Total Tools DC7 (Chinese) and the Taiwanese machine that I currently use (no branding). The most significant difference that I found between the two machines is the size of the fan outlet at the point noted in the attached picture. I don't recall the exact measurements but the Total Tools machine had perhaps 15% (?) less volume at this point compared to the Taiwanese machine. I recall that the Chinese machine had a volume at this point of a 6" round inlet (possibly even slightly less) whereas the Taiwanese machine is significantly bigger. For context the outside measurement of this outlet duct on my current machine is approx. 140 x 200mm. Being an older model my Taiwanese machine has a straight bladed fan of approx. 350mm, so very different to the Leda. I would expect the Leda to flow more air, but as previously stated I can't see the additional value over the Sherwood for a one man, one machine at a time, operation.

I really like this unit for enclosing in an internal room and venting outside.
https://www.timbecon.com.au/sherwood...-collector-3hp

It’s got a 6” impeller under that manifold, and it points up. That doesn’t sound like a big deal, but it makes ducting significantly easier, assuming you want to go up first to make a run across the ceiling. The air path is efficient, and dust goes straight to the bags without to much up, down, and around.

3HP really sucks air. I have it on the standard bags, with a single run of 6 inch ducting, and 3 drops with blast gates. It’s spectacular, very affordable, and sealed away. Surprisingly, I feel like I gained space. I built a basic stud wall room that is a perfect fit for the machine, and gained some space abode for storage. Perfect!

[QUOTE=rogerwilco;2272797]I really like this unit for enclosing in an internal room and venting outside.
https://www.timbecon.com.au/sherwood...-collector-3hp

It’s got a 6” impeller under that manifold, and it points up. [QUOTE]
I think you mean it has a 6" impeller entry.
The impeller itself is significantly bigger than 6"

Ideally an entry port bigger than 6" is desirable because the impeller will draw better if it has a Bell Mouth Hood entry - like this.

Dish1.jpg

Mine (the blue one) had an 8" entry port but to add a BMH the opening should be close to 225 mm so I replaced it with the Al one which itself has a flared opening.

Yeah, that’s what I meant! Thank you.

one of my main criteria was that I did not want to make any modifications to the machine whatsoever. Not because I can’t, but just me cause I didn’t want to be futzing around. I just wanted to plug in and go.

would 8 inch inlet have any advantage if it’s immediately stepped down to 6” PVC? I thought not so much, so the 6” inlet seemed perfect to me.

Originally Posted by rogerwilco

Yeah, that’s what I meant! Thank you.
one of my main criteria was that I did not want to make any modifications to the machine whatsoever. Not because I can’t, but just me cause I didn’t want to be futzing around. I just wanted to plug in and go.

Sounds like a MOAM (man on a mission )
I'm usually the other way - I futz around, lots.

would 8 inch inlet have any advantage if it’s immediately stepped down to 6” PVC? I thought not so much, so the 6” inlet seemed perfect to me.

No, it only has an advantage if a 6" Bell mouth hood is used.

I am still searching for something...each day the dust annoys me just that bit more to motivate me.

For my small one man, one tool at a time shop would the HafCo DC3 with a pleat filter be a decent step up from my Bayer 60L shop vac (i know i need to not use flexi, use the right size, no 90s etc). There is one nearby i am thinking about.

Would it be ok for inside use for a few months with this filter until i could plumb it to outside?

Appreciate any comments!

W394 - DC-3 Dust Collector | Hare & Forbes Machineryhouse

Originally Posted by Pete99

I am still searching for something...each day the dust annoys me just that bit more to motivate me.

For my small one man, one tool at a time shop would the HafCo DC3 with a pleat filter be a decent step up from my Bayer 60L shop vac (i know i need to not use flexi, use the right size, no 90s etc).

nothing wrong with using 90º bends - just make sure you use the large radius DWV bends - they are less restrictive that 2 x 45º.
Sometimes its easier to use flex - just avoid using great big long lengths of it.

Either one of the two you mentioned in your first post will be better than the DC3. If you don't use 6" ducting and open up the machine ports you really need to add some forced ventilation - I would recommend doing that anyway.