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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.
Intermediate
About 3 hours, plus printing
Instructions
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1
The diagonal shaft
The diagonal shaft
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A screw in the churn before it
A screw in the churn before it
An upright screw keeps the cream moving; Boyers lays his screw diagonally.
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3
Read US 13,421
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."
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Print the parts
Print the parts
Print three dashers (/uploads/blueprints/diagonal-screw-dasher-churn-dasher.stl), with supports under the dished blades, the corner step (/uploads/blueprints/diagonal-screw-dasher-churn-corner-step.stl) and the top slot (/uploads/blueprints/diagonal-screw-dasher-churn-top-slot.stl). Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.
Materials for this step:
PETG Filament1 pieceTools needed:
FDM 3D Printer5
5
Tub and shaft
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.
Materials for this step:
Food-Grade Storage Container1 piece
Silicone Sealant1 piece
Hardwood Dowels1 piece
Pine Board1 piece
Wood Glue1 pieceTools needed:
Hand Saw
Cordless Drill
Drill Bit Set6
6
The build in 3D
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.
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7
Churn
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.
Materials for this step:
Heavy Cream2000 ml
Coarse Sea Salt1 piece
Water1 pieceTools needed:
Leave-In Probe Thermometer
Stopwatch
Digital Kitchen Scale
Stainless Steel Mixing Bowl (Large)8
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Troubleshooting
Troubleshooting
Diagonal screw dasher troubleshooting.
Flow
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9
History and honest limits
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.
Materials
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- 2000 mlPlaceholder
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Tools Required
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- 1 vendor sell this, none ship to you yetPlaceholder
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Design Files
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