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Double-Motion Dasher Churn: One Crank Spins One Dasher and Plunges the Other
Emma

Yaremwe na

Emma

6. Ukwakira 2026SE
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Double-Motion Dasher Churn: One Crank Spins One Dasher and Plunges the Other

Hall combined "a vertical reciprocating-dasher with a horizontal rotary-dasher so as to break and agitate the cream in two directions at once." Alexander Hall of Loydsville, Ohio, received US 6,777, dated 9 October 1849, for a churn with a vertical spindle carrying a rotary dasher at its foot, turned by a bevel pinion and wheel from a horizontal driving shaft on the lid; a crank on the inner end of that shaft works, through a rod, a reciprocating dasher on a tubular stem sliding on the spindle, so "the currents produced by either dasher are broken and distorted by the other." This rung works out the two motions, then prints a crown wheel and lantern, the two dashers, builds the drive on a box lid, and makes butter.
Hejuru
About 5 hours, plus printing

Amabwiriza

1

Two motions from one crank

Gupakira ikaye ya Jupyter…
2

Rotary and vertical motion together before it

The embedded blueprint gives one dasher both motions through a spiral slot. Hall gives each motion its own dasher, from one crank.
3

Read US 6,777

"The cream or milk is placed in the tub and power being applied to the driving shaft (c) a rapid rotary motion is communicated through the wheels c d to the dasher b while at the same time the upper dasher h receives a vertical reciprocating motion through the crank k and rod i."
4

Print the parts

Print the crown wheel with its pegs and crank pin, the lantern pinion, the rotary dasher, the perforated reciprocating dasher with its sleeve and the crank arm. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Ibikoresho by'iyi ntambwe:

Fibere ya PETGFibere ya PETG1 igice

Ibikoresho bikenewe:

Imashini icapa 3D ikoresha umugozi (FDM)Imashini icapa 3D ikoresha umugozi (FDM)
5

Print the crown wheel

The crown wheel, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
6

Print the lantern

The lantern, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
7

Print the rotary dasher

The rotary dasher, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
8

Print the reciprocating dasher

The reciprocating dasher, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
9

Print the crank arm

The crank arm, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
10

Spindle and dashers

Glue the rotary dasher on the foot of a 10 mm square hardwood spindle and stand it in a seat drilled in the centre of a food-safe box's floor. Slide a 16 mm tube over the spindle as the stem, glue the reciprocating dasher's sleeve on its lower end, and glue the lantern on the spindle's top above the lid.

Ibikoresho by'iyi ntambwe:

Ikibindi cyo kubikamo cy'urwego rw'ibiribwaIkibindi cyo kubikamo cy'urwego rw'ibiribwa1 igice
Udukoni tw'ibiti bikomeyeUdukoni tw'ibiti bikomeye1 igice
Umuyoboro wa PVCUmuyoboro wa PVC1 igice
Ikinyabutabire cy'IbitiIkinyabutabire cy'Ibiti1 igice

Ibikoresho bikenewe:

Icyuma Cyivumbura Kidafite InsingaIcyuma Cyivumbura Kidafite Insinga
Ibyuma Byinshi byo GucukuraIbyuma Byinshi byo Gucukura
Umucumita w'IbyumaUmucumita w'Ibyuma
11

Drive on the lid

Screw two pine standards to a plywood half-lid and pass a 10 mm square driving shaft through them, with the crown wheel on its inner end meshing the lantern and the crank arm on its outer end. Join the crown wheel's crank pin to the stem's top with a pine rod on screws.

Ibikoresho by'iyi ntambwe:

Urupapuro rw'ibiti byometseUrupapuro rw'ibiti byometse1 igice
Ikibaho cy'igiti cya pinusiIkibaho cy'igiti cya pinusi1 igice
Udukoni tw'ibiti bikomeyeUdukoni tw'ibiti bikomeye1 igice
Ibitorezo by'imashiniIbitorezo by'imashini1 igice
Umupira w'Impande EsheshatuUmupira w'Impande Esheshatu1 igice
Uruganda rw'igiti #8 x 1"Uruganda rw'igiti #8 x 1"1 igice

Ibikoresho bikenewe:

Umucumita w'IntokiUmucumita w'Intoki
Icyuma Cyivumbura Kidafite InsingaIcyuma Cyivumbura Kidafite Insinga
Ibyuma Byinshi byo GucukuraIbyuma Byinshi byo Gucukura
Ikusanyirizo ry'ibitoreziIkusanyirizo ry'ibitorezi
Isupana ihindurwaIsupana ihindurwa
12

The build in 3D

FreeCAD model of this build, not of the patent: the box cut away to show the rotary dasher at the spindle's foot and the perforated dasher on its sliding stem, and on the lid the crown wheel and lantern, the rod and the crank.
Dosiye y'IgishushanyoBLENDCC0 - Free
13

Crank and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres. Crank steadily; time until the butter 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.
Intambwe 13 - Image 1

Ibikoresho by'iyi ntambwe:

Igice cy'ibinure cy'amataIgice cy'ibinure cy'amata2000 ml
Umunyu w'inyanja muniniUmunyu w'inyanja munini1 igice
AmaziAmazi1 igice

Ibikoresho bikenewe:

Igipima ubushyuhe gifite uruti rusigara mu kintuIgipima ubushyuhe gifite uruti rusigara mu kintu
Isaha yo GuhagarikaIsaha yo Guhagarika
Iminzani ya Digitale yo mu GikoniIminzani ya Digitale yo mu Gikoni
Ibakure rinini ryo kuvanga ry'icyuma kitagira ingeseIbakure rinini ryo kuvanga ry'icyuma kitagira ingese
14

Gears that skip, a stem that binds

Double-motion dasher churn troubleshooting.

Flow

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15

History and honest limits

**Alexander Hall** of Loydsville, Belmont County, Ohio, received US 6,777, dated 9 October 1849, signed 7 August 1849. The spindle could be stepped in the bottom with a bearing in the top, or hung from the top alone; and by putting the pinion on the tubular stem instead, the upper dasher could revolve and the lower reciprocate. He claimed "the combination of a reciprocating dasher with a revolving dasher." **Honest limits.** A pegged crown wheel and lantern pinion stand in for his bevel wheels; a food-safe box and printed dashers for his tub and dashers. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

Ibikoresho

13

Ibikoresho bikenewe

11

Dosiye z'igishushanyo

6

CC0 Umurenge rusange

Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.

Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.

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