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Rotary-Dasher Box Churn: Float Boards on Crossed Arms in a Curved Box
Martin

Oluşturan

Martin

6. Ekim 2026NO
12
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Rotary-Dasher Box Churn: Float Boards on Crossed Arms in a Curved Box

An up-and-down dash churn is slow, tiring work. Rufus Porter of Billerica, Massachusetts, received US 735, dated 10 May 1838, for a churn: a box eighteen inches long with a bottom curved from end to end; a wooden shaft running between a hollow cone and a pointed centre screw; two parallel pairs of rods through the shaft at right angles, carrying float boards parallel with the shaft — "what is termed the rotary dasher" — turned by a crank whose twisted tenon is pressed into the shaft and comes out when the occasion requires. This rung compares his churn's sweep with a tabletop one, then prints the dasher, builds the box, and makes butter.
Orta
About 5 hours, plus printing

Talimatlar

1

Butter yield and sweep

Jupyter defteri yükleniyor…
2

A board pushed through liquid before it

The embedded blueprint drives a boat with a flat paddle. Porter's float boards push through cream the same way, turning on a shaft.
3

Read US 735

"Four round bars or rods, sixteen inches long and one inch in diameter, pass through the shaft; two of these rods are parallel, and about five inches apart, each being one inch from one end of the shaft. The other two are parallel to each other, but at right angles with the first pair, and three inches apart; the four bars thus constituting eight arms."
4

Print the dasher

Print the rotary dasher: core, two parallel pairs of arms at right angles, and four float boards (/uploads/blueprints/rotary-dasher-box-churn-dasher.stl). Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Bu adım için malzemeler:

PETG filamentPETG filament1 adet

Gerekli aletler:

FDM 3B yazıcıFDM 3B yazıcı
5

Use a box with a curved bottom

Take a food-safe storage box about 150 × 100 mm and 150 mm deep. Drill both ends on the dasher's axis, 85 mm up. Bed a plywood strip curved from end to end in its floor with silicone, as his curved bottom.

Bu adım için malzemeler:

HDPE saklama kabıHDPE saklama kabı1 adet
Kontrplak levhaKontrplak levha1 adet
Silikon Dolgu MacunuSilikon Dolgu Macunu1 adet

Gerekli aletler:

Kıl TestereKıl Testere
Kablosuz MatkapKablosuz Matkap
Matkap Ucu TakımıMatkap Ucu Takımı
6

Cone, centre screw and crank

File an M5 screw to a point and run it through one end as the centre screw into the dasher's end hole. Through the other end pass a 5 mm rod into the dasher's seat as the hollow-cone bearing, bent outside into a crank.

Bu adım için malzemeler:

Makine vidalarıMakine vidaları1 adet
Altıgen SomunAltıgen Somun1 adet
Yumuşak Çelik ÇubukYumuşak Çelik Çubuk1 adet

Gerekli aletler:

Eğeler (El Eğesi)Eğeler (El Eğesi)
Tezgah MengenesiTezgah Mengenesi
Kurbağacık anahtarKurbağacık anahtar
7

The patent drawing

US 735 drawing sheet, public domain (expired patent).
Adım 7 - Image 1
8

Make butter

Let 500 ml of heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour it into the box, close the lid, and crank steadily; time until the butter comes. Pour off the buttermilk, add cold water, churn a few turns and pour off again until it runs clear; work in a pinch of salt and weigh the butter.
Adım 8 - Image 1

Bu adım için malzemeler:

Yağlı kremaYağlı krema500 ml
İri Deniz Tuzuİri Deniz Tuzu1 adet
SuSu1 adet

Gerekli aletler:

Takılı kalan problu termometreTakılı kalan problu termometre
KronometreKronometre
Dijital Mutfak TerazisiDijital Mutfak Terazisi
Büyük paslanmaz çelik karıştırma kâsesiBüyük paslanmaz çelik karıştırma kâsesi
9

A dasher that sticks, a box that leaks

Rotary-dasher box churn troubleshooting.

Flow

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10

History and honest limits

**Rufus Porter** of Billerica, Massachusetts, received US 735, dated 10 May 1838. His box is eighteen inches long, ten wide and eighteen deep, of boards three-quarters of an inch thick; the bottom, three-eighths thick, is curved so its centre is three inches lower than its ends; a lid with ventilation apertures fits a rabbet; the float boards are eight inches long and three wide. He gave the dimensions of every part. **Honest limits.** A storage box and a printed dasher at tabletop scale stand in for his. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

Malzemeler

10

Gerekli Aletler

11

CC0 Kamu Malı

Bu plan CC0 lisansıyla yayınlanmıştır. İzin almadan kopyalayabilir, değiştirebilir, dağıtabilir ve herhangi bir amaçla kullanabilirsiniz.

Planı üzerinden ürün satın alarak Maker'ı destekleyin, böylece Maker Komisyonu Satıcılar tarafından belirlenen komisyonu kazanırlar veya bu Planın yeni bir versiyonunu oluşturun ve gelir paylaşımı için kendi Planınıza bağlantı olarak ekleyin.

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