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UTAMADUNI NA HISTORIA
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TEKNOLOJIA
VAZI
The Grain Auger: Archimedes' Screw Spun Fast in a Tube
RICHI Manufacture · CC BY 4.0
Martin

Imeundwa na

Martin

27. Septemba 2026NO
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The Grain Auger: Archimedes' Screw Spun Fast in a Tube

Archimedes' screw lifts water slowly by trapping it between turns of a spiral. Close the spiral in a tight tube and spin it fast, and it moves dry grain instead: the flights push the grain along and the tube keeps it from turning with them. The auger fills bins, empties combine tanks and loads trucks, at any angle from flat to steep, with nothing but a shaft and a motor. It is a sibling of the bucket elevator: the elevator lifts straight up in buckets and needs a tower; the auger lifts at a slant in a single tube and goes where it is carried. This rung works out an auger's theoretical delivery and why its fill factor must be measured, and builds a clear-tube auger to measure it at three angles.
Mwanzo
About 4 hours

Maagizo

1

Delivery, fill factor and power

Inapakia daftari la Jupyter…
2

The water sibling

The same spiral lifts water when turned slowly in an open trough. The embedded blueprint builds one; compare how each holds its load.
3

Build a clear-tube auger

3D-print screw flights 40 mm across with a 40 mm pitch, in 150 mm sections with an 8 mm bore, and thread them onto an 8 mm threaded rod locked with nuts. Slide the screw into a clear acrylic tube with a 42 mm bore. Cut an intake window at the bottom and a discharge hole at the top. Mount the tube on a plywood stand that can be set at 0, 20 and 40 degrees, with the rod running in skateboard bearings at each end. Drive the top end from a geared DC motor on an adjustable supply. Keep your fingers, hair and sleeves clear of the intake window while it turns.

Vifaa kwa hatua hii:

Bomba la akriliki (wazi)Bomba la akriliki (wazi)1 kipande
Fimbo yenye nyuziFimbo yenye nyuzi1 kipande
Beringi za SkeitibodiBeringi za Skeitibodi2 vipande
Bati la mbao za kubandikaBati la mbao za kubandika1 kipande
Mota ya DC yenye giaMota ya DC yenye gia1 kipande
Dengu kavuDengu kavu3 kilogram

Zana zinazohitajika:

Printa ya 3D ya nyuzi (FDM)Printa ya 3D ya nyuzi (FDM)
Uzi wa PETGUzi wa PETG
Chanzo cha nishati ya mkondo wa moja kwa mojaChanzo cha nishati ya mkondo wa moja kwa moja
Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
Kipima-pembeKipima-pembe
Miwani ya usalama iliyo waziMiwani ya usalama iliyo wazi
4

Measure the fill factor

Keep the intake window buried in a tray of lentils. At each angle and at two motor speeds, run for 30 seconds, catch the discharge, weigh it, and read the shaft speed with the tachometer. Work out the theoretical delivery from the notebook's formula using your flight diameter, rod diameter and pitch, and the lentils' bulk density (weigh a measured jug full). The fill factor is measured delivery divided by theoretical. Tabulate it: it is highest flat and falls as the tube is tipped up, because more lentils slip back over the flights.

Zana zinazohitajika:

Kipimamzunguko cha DijitaliKipimamzunguko cha Dijitali
Saa ya kupima mudaSaa ya kupima muda
Mizani ya dijitali ya jikoniMizani ya dijitali ya jikoni
Mtungi wa kupimiaMtungi wa kupimia
NdooNdoo
5

An auger that is not moving the grain

Grain auger faults, from the first to check.

Flow

Loading...
6

Context and honest limits

The screw conveyor is old; the portable farm auger in a tube is the form that moves most grain on farms today, from combine unloading augers to bin-filling augers. **Honest limits.** The notebook's theoretical delivery assumes a full tube moving one pitch per turn — no auger does this, which is why the bench test measures the fill factor. An auger damages some grain by rubbing, more at high speed and with fragile crops. And the exposed intake is one of the most common causes of serious injury on farms: guards stay on.

Vifaa

6

Zana Zinazohitajika

13

Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

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