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Pass-Through Barrel Churn: A Twisted-Wing Dasher That Comes Out Whole Through a Hatch
Edward Spain, Philadelphia, Pennsylvania · Public domain (expired patent)
Woody

Imeundwa na

Woody

6. Oktoba 2026NO
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Pass-Through Barrel Churn: A Twisted-Wing Dasher That Comes Out Whole Through a Hatch

Spain set out to keep "the cream when it becomes thick, from revolving with the dasher," and to get the whole dasher out through a small hatch for cleaning. Edward Spain of Philadelphia, Pennsylvania, received US 5,585, dated 16 May 1848, for a barrel churn whose dasher has four beating wings, each broader at one end than the other, joined to a long and a short bar crossed at each end, the long arms at one end opposite the short arms at the other. It runs on a pivot in a bearing box at one end; the crank's axle screws into a nut at the other; unscrewed, the dasher is lifted onto its pivot end and passed out "diagonally into the square aperture in the barrel." This rung looks at the wings' geometry, then prints the dasher, bearing box and hatch, fits them to a container laid on its side, and makes butter.
Kati
About 4 hours, plus printing

Maagizo

1

The wings' geometry

Inapakia daftari la Jupyter…
2

Oblique wings on a crank before it

The embedded blueprint sets four wings at 30° to the axle on a cross. Spain twists his wings from a long arm at one end to a short arm at the other.
3

Read US 5,585

"The dasher is removed from the churn by unscrewing the operating axle from the same, and elevating the dasher on to its pivot end by passing the broad ends of the beating wings at its opposite end, diagonally into the square aperture in the barrel; when it can readily be lifted out."
4

Print the parts

Print the dasher standing on one end, with supports, and press an M10 nut into the socket at its crank end. Print the bearing box, the hatch frame and the cover with its vent tube. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Vifaa kwa hatua hii:

Uzi wa PETGUzi wa PETG1 kipande
Nati ya pembe sitaNati ya pembe sita1 kipande

Zana zinazohitajika:

Printa ya 3D ya nyuzi (FDM)Printa ya 3D ya nyuzi (FDM)
Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
5

Print the dasher

The dasher, printed as step 4 describes.
Faili ya UsanifuSTLCC0 - Free
Pakua modeli
6

Print the bearing box

The bearing box, printed as step 4 describes.
Faili ya UsanifuSTLCC0 - Free
Pakua modeli
7

Print the hatch frame

The hatch frame, printed as step 4 describes.
Faili ya UsanifuSTLCC0 - Free
Pakua modeli
8

Print the hatch cover with its vent tube

The hatch cover with its vent tube, printed as step 4 describes.
Faili ya UsanifuSTLCC0 - Free
Pakua modeli
9

The barrel

Lay a round food-grade container about 170 mm across on its side. Cut a 66 mm square hatch in its side near one end and set the hatch frame in it with silicone. Screw the bearing box inside the far end on the axis, and drill the near end on the axis for the axle. Stand it on two pine cradles.

Vifaa kwa hatua hii:

Chombo cha kuhifadhi cha daraja la chakulaChombo cha kuhifadhi cha daraja la chakula1 kipande
Kizibo cha SilikoniKizibo cha Silikoni1 kipande
Ubao wa msonobariUbao wa msonobari1 kipande
Skrubu ya mti #8 x inchi 1Skrubu ya mti #8 x inchi 11 kipande

Zana zinazohitajika:

Msumeno wa kukata mikunjoMsumeno wa kukata mikunjo
Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
Msumeno wa mkonoMsumeno wa mkono
Seti ya bisibisiSeti ya bisibisi
10

Dasher and crank

Pass the dasher in through the hatch, pivot end first, and seat its pivot in the bearing box. Cut a length of M10 threaded rod, pass it through the near end and screw it into the dasher's nut. Bend or fix a crank handle on its outer end.

Vifaa kwa hatua hii:

Fimbo yenye nyuziFimbo yenye nyuzi1 kipande
Nati ya pembe sitaNati ya pembe sita1 kipande
Vijiti vya mbao ngumuVijiti vya mbao ngumu1 kipande

Zana zinazohitajika:

Msumeno wa chumaMsumeno wa chuma
Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
Sandarusi (karatasi ya kusugua)Sandarusi (karatasi ya kusugua)
11

The build in 3D

FreeCAD model of this build, not of the patent: the barrel cut away to show the dasher of four tapering wings between a long-and-short cross at each end, the bearing box, the axle and crank, the hatch frame and its cover with the vent tube, and the cradles.
Faili ya UsanifuBLENDCC0 - Free
Pakua modeli
12

Crank and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 1 litre through the hatch and fit the cover. Turn the crank steadily and time until the butter comes. Unscrew the axle and lift the dasher out through the hatch. Pour off the buttermilk, add cold water, churn a little and pour off again until it runs clear; work in a pinch of salt and weigh the butter.
Hatua 12 - Image 1

Vifaa kwa hatua hii:

Malai nzitoMalai nzito1000 ml
Chumvi ya Bahari MbichiChumvi ya Bahari Mbichi1 kipande
MajiMaji1 kipande

Zana zinazohitajika:

Kipima joto chenye kijiti kinachobaki ndaniKipima joto chenye kijiti kinachobaki ndani
Saa ya kupima mudaSaa ya kupima muda
Mizani ya dijitali ya jikoniMizani ya dijitali ya jikoni
Bakuli kubwa la kuchanganyia la chuma cha puaBakuli kubwa la kuchanganyia la chuma cha pua
13

A dasher that will not come out, an axle that slips

Pass-through barrel churn troubleshooting.

Flow

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14

History and honest limits

**Edward Spain** of Philadelphia received US 5,585, dated 16 May 1848. A sheet-metal lining, its upper edge stiffened by a strong wire, supported the aperture so "the perfect contour of the churn about the aperture, is preserved"; a tube through the cover let "the gas" escape and fresh air enter. He claimed the form of the dasher, which gives the cream a compound reciprocating and rotary motion and lets a large dasher pass whole through a small square aperture. **Honest limits.** A food-grade container and printed parts stand in for his staved barrel and wooden dasher. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

Vifaa

11

Zana Zinazohitajika

13

Faili za muundo

5

Mchoro huu unatengeneza

Thumbnail
Kishikilia nafasi

Chombo cha kusukia siagi

Free

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

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