Guide · Cyclone separators and lids
Why a separator bucket collapses, and which buckets the makers name
What Oneida and Dustopper say about 90 mil buckets, airflow restriction and bucket fit, plus the bucket each kit includes and the 30-gallon drum lid option.
We may earn a commission if you buy through links on this page. How we make money
Picks that fit
- Dustopper PRO cyclonic separator kit with 2‑1/2 in x 36 in hose and two sweep elbowsCheck price on Amazon
- Dustopper PRO cyclonic separator only (hose and elbows sold separately)Check price on Amazon
- Rockler Dust Right dust separator with 36 in hose and 10‑gallon bucketCheck price on Amazon
Short answer
Thin, old or damaged buckets can collapse under a separator's vacuum. Oneida and Dustopper each recommend a bucket with a wall of 90 mil (0.090 inch) or thicker, and Dustopper also points to airflow restriction from very long or small hoses. Use the bucket the separator maker names or supplies, and do not modify the bucket, lid or hoses to stop a collapse.
Picks that fitAll picks and how to choose
Why a bucket collapses
A separator lid seals onto a bucket, and the vacuum pulls air out through it. If the bucket wall is too thin, the outside air pressure can crush it. This is bucket collapse. The makers name two factors: the bucket's wall and how restricted the airflow is.
What Oneida says
Oneida recommends a bucket with a wall thickness of 90 mil or more for its Dust Deputy separators, and notes that the wall thickness is usually marked on the bucket bottom.[1] In Oneida's words, a 90-mil bucket "will completely avoid bucket collapse"; that is Oneida's statement, not ours.
Oneida advises against old, damaged or thin-walled buckets, and suggests nesting two thin-walled buckets to resist collapse.[1] Its Dust Deputy Deluxe kits list a 5-gallon, 100-mil bucket among their contents.[2]
What Dustopper says
Dustopper's FAQ advises a bucket that is 90 mil (0.090 inch) thick or thicker.[3] It attributes bucket collapse to too much airflow restriction, such as very long or small-diameter hoses.[3]
Dustopper says the PRO latches onto a standard 5-gallon bucket without drilling or tools,[4] and that it fits most standard 5-gallon buckets.[5] "Most" is Dustopper's word: buckets vary, and no maker gives rim dimensions.
We do not publish any fix that involves drilling, cutting or modifying a bucket, lid, reducer or hose. If collapse continues with a bucket the maker approves, ask the separator maker.
Retailer wording
Woodcraft's listing for the Dust Deputy Low-Pro Deluxe kit (AXD259922) describes a clear "collapse-proof" 5-gallon bucket.[6] That is listing wording about that kit, not a guarantee.
Drums instead of buckets
Grizzly says the Shop Fox W1049 two-stage separator lid fits a standard 30-gallon metal trash can, which is not included, and has molded inlets and outlets for 4-inch flexible hose.[7] Grizzly gives no rim dimensions, so check that your can's rim fits the lid before you rely on it.
What each maker names
| Maker | Bucket guidance | Bucket included? | Source |
|---|---|---|---|
| Oneida (Dust Deputy) | 90 mil or more; avoid old, damaged or thin buckets | 100-mil 5-gallon bucket in Deluxe kits | Oneida FAQ, manual |
| Dustopper (PRO) | 90 mil (0.090 in) or thicker | Not in the PRO kit contents | Dustopper FAQ, product page |
| Woodcraft listing (Low-Pro Deluxe) | "Collapse-proof" 5-gallon bucket, listing wording | Yes, per the listing | Woodcraft |
| Grizzly (Shop Fox W1049) | Standard 30-gallon metal trash can | No | Grizzly |
Separators on our list
Picks that fit3 products
The Dustopper PRO kit and the separator-only version both need your own 5-gallon bucket; use one marked 90 mil or thicker, as Dustopper advises.
More on choosing
The Rockler Dust Right separator is listed with its own 10-gallon bucket (the seller's description). On Amazon, check that 'Ships from / Sold by' shows Amazon.com or the brand.
Bucket-top separator kit for 2-1/2 in vacs
Dustopper PRO cyclonic separator kit with 2‑1/2 in x 36 in hose and two sweep elbows
Separator only, for owners with hose and elbows
Dustopper PRO cyclonic separator only (hose and elbows sold separately)
Separator with its own 10-gallon bucket
Rockler Dust Right dust separator with 36 in hose and 10‑gallon bucket
Next
Questions
Why did my Dust Deputy bucket collapse?
Oneida advises against old, damaged or thin-walled buckets and recommends a wall of 90 mil or more, usually marked on the bucket bottom. Dustopper also points to airflow restriction from very long or small-diameter hoses.[1][3]
What bucket thickness do I need?
Oneida recommends 90 mil or more for its Dust Deputy separators, and Dustopper advises 90 mil (0.090 inch) or thicker for its own.[1][3]
Will any 5-gallon bucket fit a Dustopper?
Dustopper says the PRO fits most standard 5-gallon buckets, not all, and gives no rim dimensions. Check the fit on your bucket.[5]
Can I use a 30-gallon drum?
With a lid made for one. Grizzly says the Shop Fox W1049 lid fits a standard 30-gallon metal trash can, not included, but gives no rim dimensions, so check the fit yourself.[7]