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Spiral-Wing Spheroid Churn: A Ball Dasher on Balls Turns Freely on Its Rod, Its Spiral Wings Spinning It Each Stroke
Buttercup

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Buttercup

11. Novemba 2026IE
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Spiral-Wing Spheroid Churn: A Ball Dasher on Balls Turns Freely on Its Rod, Its Spiral Wings Spinning It Each Stroke

Otis W. Stanford of Cincinnati received US 28,696, dated 12 June 1860, for a churn. On the foot of an ordinary up-and-down dash rod he hangs a round or egg-shaped wooden dasher that turns freely on balls, with spiral wings nearly touching the tub's sides. As the rod is worked, the cream spins the dasher one way then the other; the cream is squeezed between the wings and the wall, and air trapped under the round body is carried into it. The patent gives no sizes; every size here is ours.
Kati
About 1 day, plus printing

Maagizo

1

How far the dasher turns each stroke

Inapakia daftari la Jupyter…
2

A dash that turns as it is driven, one week before

Ross's pitched blades turn the dash and handle on a swivel. Stanford's spiral wings turn the dasher alone, on balls.
3

Read US 28,696

"The rod C being reciprocated, as in the common churn, the inertia of the fluid acts to swiftly rotate the dasher in successively opposite directions and this reacting upon the liquid imparts to the latter a quick succession of opposite vertical movements resulting in violent agitation."
4

Print the dasher's upper half

Upper half of the spheroid, 150 mm across and 80 tall, with the upper halves of three spiral wings reaching 116 mm; bored 12.8 mm with a 32 mm recess for the upper ring of balls. PETG, 0.2 mm layers, 30 % infill, 4 walls.
Faili ya UsanifuSTLCC0 - Free
5

Print the dasher's lower half

Lower half, printed upside down, with the lower halves of the wings and the recess for the lower ring of balls. PETG, 0.2 mm layers, 30 % infill, 4 walls.
Faili ya UsanifuSTLCC0 - Free
6

Lid B with boss b

Turn a hardwood lid to fit the bucket's rim, 20 mm thick, with a boss 60 mm across and 140 mm tall in the middle, bored 26 mm through as the guide for the rod.

Vifaa kwa hatua hii:

Ubao wa Mti MgumuUbao wa Mti Mgumu1 kipande
Gundi ya MbaoGundi ya Mbao1 kipande

Zana zinazohitajika:

Kerezo cha mbaoKerezo cha mbao
Seti ya vichwa bapa vya kutoboaSeti ya vichwa bapa vya kutoboa
Kekee cha BetriKekee cha Betri
Sandarusi (karatasi ya kusugua)Sandarusi (karatasi ya kusugua)
7

Rod C, dasher D, balls G, screw E and washer F

Cut a 25 mm hardwood rod 500 mm long and glue a 12 mm stainless spindle 170 mm long into its foot. Glue the two printed halves together with the wings lined up. Slide on a ring of 6 mm stainless balls in the upper recess, the dasher, and a second ring in the lower recess, and hold them with a stainless washer and a machine screw into the spindle's end. The dasher must spin freely.

Vifaa kwa hatua hii:

Vijiti vya mbao ngumuVijiti vya mbao ngumu1 kipande
Fimbo ya chuma cha puaFimbo ya chuma cha pua1 kipande
Gundi ya MbaoGundi ya Mbao1 kipande
Beringi za mipiraBeringi za mipira20 vipande
Skrubu za mashineSkrubu za mashine1 kipande
Uzi wa PETGUzi wa PETG1 kipande

Zana zinazohitajika:

Printa ya 3D ya nyuzi (FDM)Printa ya 3D ya nyuzi (FDM)
Msumeno wa chumaMsumeno wa chuma
Tupa (Tupa ya Mkono)Tupa (Tupa ya Mkono)
Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
Seti ya bisibisiSeti ya bisibisi
8

The build in 3D

FreeCAD model of this build, the bucket and lid cut open: the rod through the boss, the spheroid dasher with its three spiral wings on its two rings of balls, held by the washer.
Faili ya UsanifuBLENDCC0 - Free
9

Churn

Pour about 6 litres of heavy cream at about 15 °C, checked with the thermometer, into the bucket, set the dasher in and put on the lid over the rod. Work the rod up and down about 150 mm, steadily, timing it; the dasher turns one way and back. When the butter comes, lift the lid and dasher out, take out the butter, pour the buttermilk into a bowl, wash the butter in cold water until it runs clear, salt and weigh it.

Vifaa kwa hatua hii:

Malai nzitoMalai nzito6 l
Chumvi ya Bahari MbichiChumvi ya Bahari Mbichi1 kipande
MajiMaji1 kipande
Ndoo ya Lita 20Ndoo ya Lita 201 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
10

Troubleshooting

Spiral-wing dasher churn troubleshooting.

Flow

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11

History and honest limits

**Otis W. Stanford** of Cincinnati, Hamilton County, Ohio, US 28,696, 12 June 1860, "Churn". He claimed the upright tub with the reciprocating rod, the spheroidal dasher and spiral wings fitting the tub. His dasher is wooden; ours is printed in two halves, and the wings' number, twist and every size are ours.

Vifaa

11

Zana Zinazohitajika

13

Faili za muundo

3
  • stanford-spiral-wing-spheroid-dasher-churn-dasher-upper.stlSTLCC0
  • stanford-spiral-wing-spheroid-dasher-churn-dasher-lower.stlSTLCC0
  • stanford-spiral-wing-spheroid-dasher-churn.blendBLENDCC0

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