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Diagonal Screw Dasher Churn: Dished Blades on a Slanting Shaft Twist the Butter Together
Jacob Boyers, Granville, Virginia · Public domain (expired patent)
Hoop

Creado por

Hoop

7. octubre 2026GB
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Diagonal Screw Dasher Churn: Dished Blades on a Slanting Shaft Twist the Butter Together

Jacob Boyers of Granville, Virginia, received US 13,421, dated 14 August 1855, for dished, perforated dashers set "at an angle thereto, so as to resemble a screw" on a shaft laid diagonally in the tub, so the butter is gathered "lump joining lump as it is twisted by the screw." This rung prints the dashers, step and top slot, fits them in a tub and makes butter.
Intermedio
About 3 hours, plus printing

Instrucciones

1

The diagonal shaft

Cargando el cuaderno de Jupyter…
2

A screw in the churn before it

An upright screw keeps the cream moving; Boyers lays his screw diagonally.
3

Read US 13,421

"The placing the shaft diagonally in the tub, is not from mere caprice; its position enables me to create a vortex, or whirlpool; the lower end of the shaft, viz., at A; while on the opposite side of the tub, viz., at B, the butter is comparatively quiet and suffered to gather in lumps."
4

Print the parts

Print three dashers, with supports under the dished blades, the corner step and the top slot. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Materiales para este paso:

Filamento PETGFilamento PETG1 pieza

Herramientas necesarias:

Impresora 3D de filamento (FDM)Impresora 3D de filamento (FDM)
5

Print the dasher

The dasher, printed as step 4 describes.
Archivo de DisenoSTLCC0 - Free
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6

Print the corner step

The corner step, printed as step 4 describes.
Archivo de DisenoSTLCC0 - Free
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7

Print the top slot

The top slot, printed as step 4 describes.
Archivo de DisenoSTLCC0 - Free
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8

Tub and shaft

Use a rectangular food-grade container about 260 by 180 mm and 220 mm deep. Seal the step into one bottom corner with food-safe silicone and clip the top slot on the opposite rim. Slide the dashers onto a 10 mm square hardwood shaft, each turned 60° from the last, and lay it from the step into the slot. Glue a crank arm and handle on its top end.

Materiales para este paso:

Recipiente de almacenaje de grado alimentarioRecipiente de almacenaje de grado alimentario1 pieza
Sellador de siliconaSellador de silicona1 pieza
Espigas de madera duraEspigas de madera dura1 pieza
Tabla de pinoTabla de pino1 pieza
Cola de carpinteroCola de carpintero1 pieza

Herramientas necesarias:

SerruchoSerrucho
Taladro inalámbricoTaladro inalámbrico
Juego de brocasJuego de brocas
9

The build in 3D

FreeCAD model of this build: the tub cut away to show the diagonal shaft from the corner step to the top slot, with three pairs of dished, perforated blades set like a screw.
Archivo de DisenoBLENDCC0 - Free
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10

Churn

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres. Turn the crank steadily and watch the butter gather on the quiet side; time until it comes. 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.
Paso 10 - Image 1

Materiales para este paso:

Crema de leche espesaCrema de leche espesa2000 ml
Sal marina gruesaSal marina gruesa1 pieza
AguaAgua1 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
11

Troubleshooting

Diagonal screw dasher troubleshooting.

Flow

Loading...
12

History and honest limits

**Jacob Boyers** of Granville, Virginia (the specification writes "Monongahela" County), US 13,421, 14 August 1855. He claimed the shaft combined with the dashers as arranged. A container and printed parts stand in for his tub. FDM prints hold food in their layer lines, so wash well and replace when worn.

Materiales

9

Herramientas requeridas

8

Archivos de diseño

4

Este plano hace

Thumbnail
Marcador

Mantequera

Free

19
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