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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

Creado por

Buttercup

11. noviembre 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.
Intermedio
About 1 day, plus printing

Instrucciones

1

How far the dasher turns each stroke

Cargando el cuaderno de 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.
Archivo de DisenoSTLCC0 - 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.
Archivo de DisenoSTLCC0 - 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.

Materiales para este paso:

Tabla de madera duraTabla de madera dura1 pieza
Cola de carpinteroCola de carpintero1 pieza

Herramientas necesarias:

Torno de maderaTorno de madera
Juego de brocas de palaJuego de brocas de pala
Taladro inalámbricoTaladro inalámbrico
Papel de lijaPapel de lija
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.

Materiales para este paso:

Espigas de madera duraEspigas de madera dura1 pieza
Varilla de acero inoxidableVarilla de acero inoxidable1 pieza
Cola de carpinteroCola de carpintero1 pieza
Rodamientos de bolasRodamientos de bolas20 piezas
Tornillos de máquinaTornillos de máquina1 pieza
Filamento PETGFilamento PETG1 pieza

Herramientas necesarias:

Impresora 3D de filamento (FDM)Impresora 3D de filamento (FDM)
Sierra para metalesSierra para metales
Limas (lima de mano)Limas (lima de mano)
Taladro inalámbricoTaladro inalámbrico
Juego de brocasJuego de brocas
Juego de destornilladoresJuego de destornilladores
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.
Archivo de DisenoBLENDCC0 - 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.

Materiales para este paso:

Crema de leche espesaCrema de leche espesa6 l
Sal marina gruesaSal marina gruesa1 pieza
AguaAgua1 pieza
Cubo de 20 litrosCubo de 20 litros1 pieza

Herramientas necesarias:

Termómetro de sonda permanenteTermómetro de sonda permanente
CronómetroCronómetro
Báscula digital de cocinaBáscula digital de cocina
Bol grande de acero inoxidableBol grande de acero inoxidable
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.

Materiales

11

Herramientas requeridas

13

Archivos de diseño

3

CC0 Dominio público

Este Blueprint se publica bajo CC0. Eres libre de copiar, modificar, distribuir y usar este trabajo para cualquier propósito, sin pedir permiso.

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